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1. To exit the Graph select Close from the Files menu then click Cancel in the STK Graph Tool window To remove access graphics from the Map window highlight ERS1 in the Associated Objects list and click the Remove Access button Our next task is to see when Santiago has access to the Shuttle In the Access window highlight Shuttle in the Associated Objects list and click Compute The Map window now displays the access between the Shuttle and Santiago 3 20 Satellite Tool Kit Tutorial Intermediate Skills 4 4 4 roi CHAN For this access let s see azimuth elevation and range data Click the AER button in the Reports field An AER Report window appears summarizing azimuth elevation and range Satellite Tool Kit Tutorial 3 21 Intermediate Skills Keep this window open In the Access window click the AER button in the Graph field to see this same data in graph form Graph Facility Santiago To Satellite Shuttle AER Files Edit acility Santiago To Satellite Shuttle Azimuth Elevation amp Range 6 Jul 1997 22 56 23 Angle 2000 1500 1000 500 1 Nov 1997 08 32 05 786 1 Nov 1997 12 36 17 41 1 Nov 1997 16 40 29 04 Azimuth deg Time UTCG Elevation deg Range km m Clicked At X y AI Restore Nearest Point x y Now close both the Graph and Report windows and click Cancel in the Access window Oops We forgot to cle
2. ceeeeeeeeees 3 23 ACCESS ON SENSO TOSE O oai eee a cares eee E 3 25 PAAANO e E Cee ee 3 25 Determining Access Between the SCMSOIS secs canada cianned tina rauniedoaceapadenaeanntanas 3 26 UNG ZOON Ear e a a 3 26 CIE EAI e e Mad he tid A T te 3 28 SMT NE C N aA anmeenrainenan tare cu eeu 3 28 MORE INTERMEDIATE SKILLS ncanicatcdennsnccncreatlonaienadiaeanennatca T CAE E SMSO AE AEE A Kher TA E E E ETAT 4 2 Satellite Tool Kit Tutorial iii Table of Contents Access TOM ale Ol SUM hc cessor tear ax tage a Saori AE EE 4 2 SEINE SWA d eee eon mene net e cer a om eon NS 4 5 Creating the satellite SWVAUN 4 ach acuiieneacci isdn dient pais ha acuidene seat Ted dhene mens hions 4 5 USING Tne LONG lenin Ot IEGIGION a AA 4 ANIMANGA SCCMANO aaa sissies ATER enews 4 12 Using the City amp Satellite Databases oe cece eeeteeenttteeeeeeeeeeeeeeee 4 13 AO MAMING TING SCCM ANIO a ea E E A E 4 15 Generating lt OMmbpitatOMn kep i siaccess Goldie eaeaiaaertieluwiaenans 4 16 MAD PLO CUO Sarsia E E EE aetna 4 17 PANUNG Map sri nde deademtuaine dua cadeeenademiedaqunetaaseet tor 4 20 Vap BelICKGFOUINIGS ceia ea aa o a a aaa ea e ies 4 2 SAVN T ES sala O aaa R A 4 22 PUD PING DSI S a n e beep E N a aa D7 GOAO S o CCION kega S 5 4 Fz 0 a at a 9 lf CREE eee OEY e eara ae An Reet meen ee eee 5 2 GE MG SUAS Ca sie hteads aati A eee E A ea ates 5 2 Facility and Target CONS TaN E aa a 5 3 Setting Facility OFS EAS seasainn aS aie Mates E
3. Tutonal Simple and complex tasks designed to teach users how to manipulate objects and perform functions easily in STK VERSION 4 0 FOR ENGINEERING WORKSTATIONS AUTHORS SHEILA R MARSHALL ANALYTICAL GRAPHICS INC 660 American Avenue King of Prussia PA 19406 GS01 MO40 AG04 070797 This document and the software described in it are the proprietary and trade secret information of Analytical Graphics Incorporated They are provided under and are subject to the terms and conditions of a written software license agreement between Analytical Graphics Incorporated and its customer and may not be transferred disclosed or otherwise provided to third parties unless otherwise permitted by that agreement Use reproduction or publication of any portion of this material without the prior written authorization of Analytical Graphics Incorporated is prohibited While reasonable efforts have been taken in the preparation of this manual to ensure accuracy Analytical Graphics Incorporated assumes no liability resulting from any errors or omissions in this manual or from the use of the information contained herein Copyright 1997 Analytical Graphics Incorporated All Rights Reserved Satellite Tool Kit STK is a registered trademark of Analytical Graphics Incorporated The Analytical Graphics name and triangle logo design are registered trademarks Reg U S Pat amp Tm Off Restricted Rights Legend US Departmen
4. Make sure to Zoom Out to a normal view before you turn the Use option OFF otherwise the default resolution remains at the level displaying on the Map at the time you turn the Warning Use option OFF Satellite Tool Kit Tutorial 3 27 Intermediate Skills Clean Up To clear the access graphics from the display click the Remove All button in the UserAntenna s Access window then click Cancel Saving the Scenario Before proceeding to Chapter 4 or if you wish to stop here you should save your new scenario Highlight the Tutorial40 scenario in the Browser window and select Save from the Files menu The system saves the scenario and all objects created for and inserted into the scenario To exit STK select Exit from the Files menu 3 28 Satellite Tool Kit Tutorial MORE INTERMEDIATE SKILLS Goal for this Section The objective of this section is to learn how to use a number of STK tools including the Satellite Database City Database Long term Orbit Predictor LOP and advanced Graph features You ll also learn more about the Map window and how to display background graphics change projection types and print Chapter Contents GetiNng Stine aera a versus a E tabetha altar venti oelieh ves 4 2 Access from a Planet Or Star o oo ccc cccccccccccccccccuccccuccccuccceucuceuccencuseucusesensaeens 4 3 ee ees 000 eee ee et ee 4 5 Satellite Tool Kit Tutorial 4 1 More Intermediate SKills Crea
5. Edit Mode amp Add New Point wv Change Current Point Insert Point Delete Point 74 900 deg 74 500 de 0 000 nm 4 300 nm hr 0 000 nm OK Apply Cancel Help Satellite Tool Kit Tutorial 2 23 In the Route tab make sure the Start Time is set to 1 Nov 1997 00 00 00 and the Propagator is set to Great Arc Once you enter a Rate and Start Time for a great arc vehicle ship aircraft or ground vehicle STK calculates the Stop Time which can t be changed by the user Begin entering the waypoint values shown in Table 2 7 for the Cruise ship in the text boxes just below the Waypoints Table When you finish a line of data click the Insert Point button Table 2 7 Cruise ship waypoints Latitude Longitude Altitude Rate Turn Radius Setting the Attitude for a Ship Now we need to set the attitude of the Cruise Click the Attitude tab in the Basic Properties window and make sure that ECI velocity alignment with nadir constraint is showing in the Attitude Type field 2 24 Satellite Tool Kit Tutorial When you finish click OK In the Map window click the Reset button The Map window is updated to reflect the changes made Satellite Tool Kit Tutorial 2 25 Creating Satellites Now let s add a few satellites ERS1 Shuttle TDRS East and TDRS West During the remainder of this exercise we want the Time Units for the scenario displayed in seconds Open the scenario
6. PRO Advanced Analysis Adding an Area Target Now we re going to create an area target Area targets are used to define geographical points of interest on the ground For the purposes of this tutorial we re going to assume that the Cruise ship has run into the Iceberg Well create an area target that defines the search area for any survivors and salvageable equipment Click the Area Target icon in the lower portion of the Browser window then name the new area target SearchArea Open the Graphics Properties window for SearchArea In the Attributes tab change the Line Width to 3 select None as the Marker Type and turn OFF the Inherit Settings and the Show Label options Click OK Now let s define the target Open the Basic Properties window for the area target SearchArea Basie Properties a iL Boundary Centroid Description Latitude Longitude Edit Mode Points 78 4399 77 6125 Add New Point 77 7879 71 1578 74 5790 69 0714 71 6591 69 1316 70 0291 70 8318 wv Change Current Point Insert Point Delete Point 71 9851 deg 76 3086 der OK apply Cancel Help In the text boxes below the Points Table enter the Latitude and Longitude values found in Table 2 10 After you enter each latitude longitude pair click the Insert Point button 2 38 Satellite Tool Kit Tutorial Table 2 10 Area target boundary points Latitude Longitude 78 4399 77 6125 77 1879 7
7. z geyttehee eee et ax Sipe Sens rfin je PASS ne oF ane ae tae fF JT Line of Sight OK Apply Cancel Help Make sure that the Azimuth Angle options are ON Change the value for Min Azimuth Angle to 45 0 and the value for Max Azimuth Angle to 135 0 Click OK Setting Up the Associated Object We want the constraint pattern to be clearly visible so we ll propagate a week of ERS1 ephemeris before calculating the access Open the Basic Properties window for the ERS1 satellite We are creating a week of ephemeris for ERS1 so STK may take a few minutes to calculate the data Note 5 6 Satellite Tool Kit User s Manual Advanced Skills In the Orbit tab change the Stop Time to 8 Nov 1997 00 00 00 00 then click OK ani aN NAY j Wo NV i ii ri W f n ee AN MN My i ne ma ON N Wi nl Hi Hy Calculating the Access Now open the Access window for the Santiago facility il 1 J i l i i Satellite Tool Kit Tutorial Advanced Skills In the Associated Objects list highlight ERS1 and click Compute The Map window displays the access from the Santiago ground station to the ERS1 satellite uae ama Ki Vi g pany re a hh 7 hy T l i my he Ny NN MW AK 1 XY ON HK WAX OKY ay WA WON an W OOM i Now we can manipulate the access constraints and see an interactive update in the Map window Open the Constraints Properties window for the Santia
8. In the Map window click the Zoom In button on the tool bar Now position your cursor in the Map window hold down the left mouse button and drag the mouse until the Map displays a box around the Santiago facility Release the mouse button so that the Map is magnified to display the area within the box ajajaja ajoe _ rA E UAA 5 4 Satellite Tool Kit User s Manual Advanced Skills Next we need to change the color of the facility in the Map window so that it is more clearly visible Highlight the Santiago facility in the Browser window then select Graphics from the Properties menu Santiago Graphics Properties af Attributes AzEIMask Display Times Color red Marker Style og mi OK Apply Cancel Help Change the color of the facility to Red then click OK Santiago 1s displayed in red on the map Setting Facility Constraints The graphics don t change because these constraints only apply at the time an access is calculated with the facility Note Now we want to set some constraints for Santiago Select Santiago in the Browser then right mouse click and choose Constraints from the menu that appears Satellite Tool Kit Tutorial 5 5 Advanced Skills Santiago Constraints Properties a Basic Sun Temporal Azimuth Angle Elevation Angle E Min 45 0000 deg f Max 135 0000 deg Azimuth Rate Elevation Rate Angular Rate Altitude al Min gogig nn
9. SRP Cross Sectional Area 20 000 m 2 Vehicle Mass 1000 000 kg Cancel Help In this Force Models window we re going to change the Earth Gravity Maximum Degree and Maximum Order to 6 Make sure the Use Solar Radiation 4 8 Satellite Tool Kit Tutorial More Intermediate SKills Pressure is ON and the Use Drag option is OFF Click OK then click OK again in the Orbit tab A progress indicator appears while STK computes the data When STK is finished highlight the LOPSat in the Browser then select Graph from the Tools menu SIK Graph Tool LOPSat Styles Graph Az El Beta Angle Create Classical Orbit Elements Euler Angles Time Period l J2000 ECI Pos Vel J2000 ECI Position Velocity LLA Position Style LOP Graph Lighting Times Properties Solar AER Sun Vector ECF Add Yaw Pitch Roll New Remove Make Copy Fi LOP Graph Cancel Let s make a new style to graph the orbit parameters In the STK Graph Tool click the New button then type LOP Graph in the text box below the Styles list and click Change Now click the Properties button to define the graph s options Satellite Tool Kit Tutorial 4 9 More Intermediate SKills ai 5 CT Cr eT 5 ET 5 5 CT si CT ET 5 In the Contents tab open the LOP Mean Elements folder in the Elements list and select Argument of Perigee Use the right arrow button to copy this element to the y list No
10. Tutorial 2 3 A Load a scenario from one of the selection lists or create a new scenario Demo Scenarios Last Loaded Scenarios chains molniyal MolniyaComm cerise rfi JT Display on Startup Cancel To create a new scenario click the Scenario icon to the left of the Create a New Scenario field in the Startup Wizard A Map window appears Scenariol Earth View a if 20 20 40 Lon 50 690 Time To name the new scenario double click on the name Scenario in the Browser window type the word Tutorial40 in the highlighted text and press Enter lt 4 2 4 Satellite Tool Kit Tutorial The Browser window is updated to reflect the new name Satelite Too Kit File Edt Properties Tools Window Help EA STK 22 Tutoriali l 4 ie A a For publication purposes map colors have been reversed In most instances the Map window is a color on black display Note To change the size of the Map window click and hold the mouse button on any of the x corners and drag the window border When you release the mouse button the window H int resizes Click the button on the Map window tool bar to ensure that the correct 2 1 aspect ratio is preserved We are now ready to start building a scenario Setting the Tutorial40 Environment Before performing any tasks in STK we need to set parameters that will affect all aspects of your scenario as it
11. gt Og a OONO Ae ae ox a Ay ARSE ete a Ke XK 0 0 9 9 Ke EX ro VRE OKD KAA V A is Ni T yi KA A RY v YUKA PAN A i M EIR it oy v ve ATNA NA My W a al w Ai NVA Ai YA w M a i WV ay iN VAV MNE a i iN ih no l Nn i NNN Wie Wie AWA hi if ie Ry i Ht th Mi Hel ass il mn ANA i it W Wh Ha Nal ue i Vy ay I a N i ue a UO We MN CE E 5 oe Fe ee ae soe Se a Now click the Access button in the Reports field of the Access window to view data in a report form An Access Report window appears 5 10 Satellite Tool Kit User s Manual Advanced Skills When you finish close the Report window Now let s set some constraints on the Horizon sensor Open the Constraints Properties window for the sensor Change the Min Azimuth Angle to 60 0 and the Max Range to 500 00 nm then click OK Make sure the options are ON The Map window updates to display the constrained access aa ef el 6 2 E al a et K Pas SAM ON OG ns R K SANA iy iy Na M ay Le an ie We W WG nl Hy Ne AY hy i We y me ney ay WN ay Wives An ihe a iF a Hy ih NA Hi yi aon i ih iit i Ne 2 an Ny uh ay Wi DA AN AN vy ANA m on A iN a a ee aay E NESS Pe gt to IML Ty O Satellite Tool Kit Tutorial 5 11 Advanced Skills Summary and Clean Up Weve completed two fairly straightforward exercises using constraints however constraints can b
12. s Basic Properties window and select the Units tab Change the Time Unit to Seconds then click OK STK recalculates all time related entries to coincide with the new Time Unit set Now we can begin adding the satellites First were going to add two Tracking amp Data Relay TDRS satellites In the Browser window click the Satellite icon An Orbit Wizard appears Orbit Wizard introduction of 4 Do not display Orbit Wizard at Satellite creation EEN Next gt Cancel Click Next Now select Geostationary and click Next 2 26 Satellite Tool Kit Tutorial Orbit Wizard Geosynchronous Definition 3 of 4 A satellite in a geostationary orbit will remain fixed in the sky above the specified longitude Subsatellite Longitude 100 0000 deg lt Back Next gt Cancel In the Geostationary Orbit Wizard window make sure the Subsatellite Longitude is set to 100 0 then click Next Finally change the Start and Stop Times to 1 Nov 1997 00 00 00 00 and 2 Nov 1997 00 00 00 00 and click Finish Now change the satellite s name to TDRS Were just going to insert the next TDRS satellite Highlight the Tutorial40 scenario in the Browser then select Insert from the Files menu When the Insert window appears make sure yov re in the tutorial subdirectory then set the File Type to satellites and select TDRS_4 sa in the list of available files To resize the Browser window or any ot
13. Adding Sensors to Targets and Facilities nsnnnneeeeeee errereen 2 46 EEE LS o EEE E EE EN E T E EEA T ET 2 48 SVING He SCENO pi E E idasetats 2 48 Getting Started The directory in which STK is installed contains a subdirectory called tutorial that you ll being using to store the data generated during this tutorial 2 2 Satellite Tool Kit Tutorial With your STK software you received an stkDemo scenario and associated data files By default these files were loaded in lt Install Dir gt STKv3 Data The files are currently located in the master STK directory which is globally shared by all STK users on your system If STK is installed on a UNIX platform and you haven t yet run STK you must first identify the directory in which STK is located If you haven t yet run STK and lt iInstall Dir gt STKv3 bin is not in your current path you must type the fully qualified path lt itnstall Dir gt STKv3 bin stk Starting STK Start STK by typing stk and pressing at the user prompt Creating the Tutorial40 Scenario The scenario is the highest level object in STK it includes a map and contains all other STK objects e g satellites facilities etc This section of the tutorial guides you through the process of creating and populating a scenario This exercise assumes that you are just opening STK When you first start STK a Startup Wizard appears along with the STK Browser window Satellite Tool Kit
14. Animate Highlight and Static Highlight options in the Graphics field are ON Now click Compute 3 18 Satellite Tool Kit Tutorial Intermediate Skills The Map window ts updated to highlight the portion of the ground track during which access between ERS and Santtago is possible f ll Po ee ELS berg ae as rll i Now that the graphics for the access have been displayed let s determine the start and end time of each access as well as the duration Make sure that ERS1 is highlighted in the Associated Objects list of the Access window In the Reports field click the Access button to display associated access data in a report format Satellite Tool Kit Tutorial 3 19 Intermediate Skills Close the Access Report window To see the data presented in graph form click the Access button in the Graphs field Graph Facility Santiago To Satellite ERS1 Access Files Edit Facility Santiago To Satellite ERS1 Access Times 1 Jul 1997 18 09 43 InviewDatay H H 1 Nov 1997 00 00 00 00 1 Noy 1997 12 00 00 00 2 Nov 1997 00 00 00 00 UTCG Clicked At X 1 Nov 1997 11 28 06 71 Y 1 010309 es 5 Restore Nearest Point x 1 Nov 1997 11 27 55 368 Y 1 000000 InviewData You can click a point in the graph to display its X and Y coordinates as well as the Nearest X and Y Data Points The text box on the far bottom right of the window shows the data element selected
15. amp Shuttle TORS L TDRS_4 Cruise Iceberg 2 F122 21 0 F JT Lat 24 545 Lon 166 116 Time First lets make sure we can see the ERS1 satellite Open the Graphics Properties window for the satellite and make sure that the Display Time is set to Always On Defining a Satellite Orbit In Chapter 2 we propagated four hours of ERS1 ephemeris As a user you may want to calculate the orbit for the ERS1 satellite over the next 4 hours or maybe over a full week Our first task is to propagate ephemeris for a given period of time Satellite Tool Kit Tutorial 3 3 Intermediate Skills You may want to change orbital parameters to become familiar with the choices available A complete list of parameters can be found in the STK User s Manual Orbital parameters are currently displayed using the unit settings we specified in Chapter 2 of this tutorial In the Browser window highlight the ERS1 satellite and select Basic from the Properties menu Changing Orbital Parameters As a user you may want to manipulate orbital parameters to conduct analyses using different settings In addition the parameters specified for a satellite may be different from the parameters you wish to use For instance you may want to use apogee and perigee altitude values instead of the semimajor axis and eccentricity values originally entered for the ERS1 satellite STK allows you to switch orbital parameters a
16. minutes the Auto Save and Save Vehicle Ephemeris features are ON and the Binary Format and Save Accesses options are OFF Click OK to apply the changes and dismiss the Basic Properties window Setting Scenario amp Map Properties It is important to set parameters at the scenario level as well as the application level We re going to set units of measure to be used throughout the scenario and also set map graphics so that the display of objects in the Map window are easily visible Setting Units Set the units of measure to be used throughout the scenario by highlighting the Tutorial40 scenario in the Browser window and selecting Basic in the Properties pull down menu Satellite Tool Kit Tutorial 2 7 First change the scenario s Start Time and Epoch to 1 Nov 1997 00 00 00 00 and its Stop Time to 1 Nov 1997 04 00 00 00 Click the Animation tab To ensure that the Map window is set to the correct time period make sure the Start Time of the Animation to 1 Nov 1997 00 00 00 00 Now click the Units tab 2 8 Satellite Tool Kit Tutorial TimeUnit Hours hr DateFormat Gregorian UTC UTCG AngleUnit Degrees deg MassUnit Kilograms kg PowerUnit dBW dBW FrequencyUnit Gigahertz GHz SmallDistanceUnit Meters m LatitudeUnit Degrees deg LongitudeUnit Degrees deg OK Apply Cancel Help For the purpose of this tutorial set Units fields as shown in the table following To change the default settings hi
17. or need assistance in performing your analysis tasks 5 28 Satellite Tool Kit User s Manual A Access AER 3 23 Target to Vehicle 3 18 Vehicle to Vehicle 3 22 Access 3 18 Constrained Access 5 Constraint _ 5 1 0 Facility to Vehicle 3 18 5 7 Remove Access 3 28 4 5 Reports 3 20 3 21 4 5 5 10 Sensor to Sensor 3 25 3 26 Sensor to Vehicle 5 10 5 16 Vehicle to Planet _ 4 2 Vehicle to Star _4 2 Advanced Analysis Astrodynamics Attitude Simulation 1 6 Data Management 1 7 Data Visualization _ 1 Sensor Constraints _ 1 6 Sensor Definition 1 6 Advanced Analysis 1 6 Satellite Tool Kit Tutorial STK TUTORIAL INDEX Attitude Targeting 6 Advanced Skills 5 Advanced Skills in STK 1 4 AER Access 3 23 Animating a Scenario 242 4 12 Area Targets _ ____ 2 38 Graphics Properties 2 38 New 238 Atmospheric Drag _ 1 8 Attitude Simulation _ 1 6 Attitude Targeting 1 6 Auto Save ________ 2 6 B Barycentric Displacement 1 8 Black Bodies _ 1 8 C Changing Orbital Parameters 3 4 Ch
18. 1 1 1 al 1 Clean Up If you wish to save the work you ve completed in the Tutor4 scenario do so now When you finish select Close from the Files menu The Map window disappears Sensor Swath In the Browser window select Open from the Files menu then highlight the Basic scenario located in the Basic Scenarios subdirectory of Data 5 26 Satellite Tool Kit User s Manual Advanced Skills 150 120 gt 90 60 30 D 30 BO 50 120 150 ee eae gt f In the Browser window select BasicSensor1 right mouse click and select Swath in the menu that appears Color Line Marker Style Line Width JT Swath red Solid 4 il ad Start Time 1 Jun 1997 01 00 00 00 Stop Time 1 Jun 1997 06 00 00 00 Turn the Swath option ON Set the Swath Color to Royal Blue the Line Style to Solid and the Line Width to 2 Click Apply Satellite Tool Kit Tutorial 5 27 Advanced Skills Basic Earth View a C aj 4 4 4 tt gt leee Lat 80 554 Lon 69 796 Time You ve made it We re finished the last chapter of the tutorial Final Notes These exercises illustrate only a portion of STK s capabilities You may want to review the STK User s Manual for more complete information about features you ve worked with in this tutorial or to learn about other aspects of STK not addressed here Please call our toll free number 1 800 220 4STK if you have any questions
19. 2 3 Creating the Tutoral4 o SCCM AN O scnis annone ean ey asdtanierasieet evened ast 2 3 Setting the Tutorial40 ENVIFONMENE eee cece cece eee eeeeeeeeeeeeeeeeeeeeaaeeeaneees 2 5 seting Applicaton Properes seian a E eeiseea 2 6 Seting save Preferences nccc EE E 2 6 Setting Scenario amp Map Properties veestesseeseserscauratens aSaanvssawsdesveaeaevsequiadereataad 2 SETUP TIPS es dared ee dere N 2 setting arapAICS Properes 2656522 case a ee ee 2 10 eg Pla g ben ieee ree terete erred rere ETE AEE ret er ere te ere e etre err Terre ee 2 13 CEND F i S weeps Ree et eee ye ee etre ee eae S 2 14 Setting the Facility s POSION ce cscent eee hctctesste ma otduteccneet lt Enecendttaneta ba edoutens 2 15 identifying the Facility Tor Future Referen Esnetan inian 2 16 POOIIIG WICKET AGINICS 5 rn a E N AN 2 17 Adding Facilities Using the Facility Database sctscseicectendesadacscentcaiseseseaciecepeieenacleceass 2 18 T a E ert trent ak veneer ee rene 2 2 Setting the leargets POSIOM S Descriptor xs i sacseash nthe en DE dake 2 22 Ei aT ies Se oe Sea ec pen emcee meee cee ener gene ene ene eens a eee 2 23 CT CARING Gl SIMD ariteninntire oan agtetand ania ce A DA reacties 2 23 Setting theAtitude fora SAlOet alata tila 2 24 Credtng s wee Se ea a E E A A OTAN 2 26 Propagating UD SCORES airar REEE OT 2 27 AadinNg mMOre SatelltES saines e a e aa 2 28 changng ODJET ANTIDE riirii rinine a OO Gerais ohuhis 2 33 sampling Map FV OICCHON
20. 5 5 Setting Up the Associated O JEct oe iivcncstncnianinacesdat gualuvieedstilawncednerndnanelinigustarts 5 6 CAIGUIAUING EACCES Sse a a a E tbat dbtncy 5 SAGIE SGASOF COMSU GIGS nna AA AS 5 10 summar ma cea WO eaaa A S A 5 12 Displaying a Ground Sensor Pattern at a Specified Altitude oe 5 13 MONS AD ise toate caress asta eat eee neater agen tam aatehee connate E seta aee cate 5 16 Generating a Waker Constela eriin an tac tacpst oun alicenpbners 5 17 U k a acer ener ne err 5 20 setting Up Ue LIGMUHMG EMD UES aR a 5 22 HONN DUNNGANMIUO mremerereer aerate a er ren ne ture are rumen centr 5 24 IV Satellite Tool Kit Tutorial Table of Contents RN AIUD ea Sehnert lesan sea E E E iesatawaeeeeazes 5 2 SEU TSOM SME rsa E EEEE E E NE eb Boss eed Sealant decd 5 2 PANO cee eer ee eee ee NS ROT Oa RS Oe ee ne ONT aS Oe eee 5 29 Satellite Tool Kit Tutorial V Table of Contents vi Satellite Tool Kit Tutorial STK TUTORIAL About this Tutorial The STK Tutorial provides exercises that will assist you in developing a solid understanding of the basic functions in STK as well as a brief introduction to some of STK s more advanced features and functions For those who are entirely new to aerospace analysis and or STK these first few pages provide a general overview of both Satellite Tool Kit STK is an aerospace analysis software package with highly sophisticated capabilities While you may be familiar with some of it
21. 70 and the Stop Time to 1 Nov 1997 02 00 00 00 then click OK Satellite Tool Kit Tutorial 5 17 Advanced Skills Now we ll generate a Walker constellation Highlight the Walker satellite in the Browser window and select Walker from the Tools menu A Walker window appears Set the Number of Planes to 1 the Number of Sats per Plane to 4 and the Inter place Spacing to 0 and click Apply tutor4 Earth View 1 a O ajajajaj gt Le A wa Fi a Lat 90 000 Lon 123 375 Time Step 100 00 sec Time 1 Nov 1997 00 00 00 00 Paused Now change the Number of Planes to 2 the Number of Sats per Plane to 4 and the Inter plane Spacing to 1 and click OK 5 18 Satellite Tool Kit User s Manual Advanced Skills tutordFarthView SSCS aaam 7 ws ws S a oS i a Lat 78 444 Lon 117 776 Time Step 100 00 sec Time 1 Nov 1997 00 00 00 00 Paused aaaannniannd We can leave this scenario as it is for the next exercise Lighting It is often necessary for the analyst to understand the lighting conditions for a satellite STK allows you to display this information both in report and graph format STK can depict the lighting conditions of the satellite by changing the color of the ground track to visually display those conditions in the Map window STK can also display the solar terminator and the subsolar point during animation In the Browser window create a satellite When the Or
22. drag are used often in this manual Click means to press and release a mouse button Double click means to press and release a mouse button twice in rapid succession Click and drag means to press and hold a mouse button while moving the mouse then release the button once you stop moving to define an area on the screen Unless otherwise noted use the left mouse button to perform actions Satellite Tool Kit Tutorial STK Tutorial Window screen buttons are displayed in a sans serif font or a picture of the button is displayed For instance the manual may refer to the OK button or just display the button as __ Window titles are displayed in a bold italic sans serif font while tabs within a window are displayed in bold sans serif and fields in plain sans serif For example the Map Background tab of the Graphic Properties window contains the Background Image File field Notes to the reader are located in a shadowed box Information contained in these notes is important and should be taken into consideration Notes are identified by the heading Note and a icon in the outside margin Hints to the reader are located in a shadowed box Hints may contain shortcuts or helpful information to make your work easier They are identified by the heading Hint and a icon in the outside margin Warnings to the reader are located in a shadowed box Warnings contain important information for the user that may cause problems
23. is built To perform the tasks set out in this tutorial please use the settings in the subsections following Satellite Tool Kit Tutorial 2 5 Note Setting Application Properties You can alter parameters at any time during your session First we need to set parameters for the STK application These higher level parameters affect every object within the application regardless of the scenario currently open To set parameters for the STK application first ensure that the STK application indicated by the 4 icon is highlighted in the Browser window Click the Properties menu and highlight Basic in the pull down menu A Basic Properties window appears Setting Save Preferences It s important to save your work frequently to prevent loss of data You can use the Auto Save feature in STK to save your work for you It is a good idea to set Auto Save for your normal STK sessions as well as for this tutorial Save Prefs aren t saved when you exit STK you must reset these options each time you run STK or use the Set as Default option for the scenario level 2 6 Satellite Tool Kit Tutorial SFK Basic Properties Save Prefs Pc Online Ephemeris Accesses I Save Vehicle Ephemeris Save Accesses _Guick Save Binary Format AutoSave JT Enabled Directory Amp Save Period min 5 000 OK Apply Cancel Help For the purposes of this tutorial make sure the Save Period is set to 5
24. target This attitude data is typically used with sensor information to resolve complex geometries when computing ground site visibility and link accesses Sensor Definition and Constraints Sensor definition features allow characterization of alternative sensor types and parameters This includes targeting gimbaled sensors customization of non conical sensor patterns and characterization of specific parameters for optical sensors Sensor constraint features support a diverse and sophisticated set of parameters characterizing sensor access limitations 1 6 Satellite Tool Kit Tutorial STK Tutorial Astrodynamics Astrodynamics features enable use of specialized alternative orbit element sets and coordinate systems each offering unique analysis advantages Data Visualization Data visualization features exploit the special advantages of eight alternative map projections for visualization of ground based information Additionally area targets are provided as STK objects and visualization of vehicle and sensor swaths is supported Data Management Data management features include three data input output I O convenience functions Custom reports allow users to specity precisely those Output parameters important to their analyses This allows more concise reports containing only the data of interest Batch processing options allow users to predefine a series of mission scenarios exercising the important parameter space for a given
25. teen int in ern renee en ner hea te eran eee ce rere 10 WET IM eesti De sneha a 55 octane occas Made cae aa adieu Soleus aoe 11 FIGEUSESOIGHION IODS srera E E l 11 STK Tutorial Levels of Expertise This tutorial is intended to guide you through creating using and manipulating a sampling of the many analysis tasks that can be performed 1 2 Satellite Tool Kit Tutorial STK Tutorial with STK The tutorial s step by step approach shows you how to perform tasks that may be part of your typical workday Both new and experienced STK users will benefit by working through this tutorial section by section The intermediate tasks in Section 2 depend upon a foundation of components data and analysis performed in Section 1 Following is a summary of each tutorial section including goals and estimated completion times Chapter 2 Introductory Skills The goal of Chapter 2 is to familiarize new STK users with the components that comprise the Satellite Tool Kit You ll become familiar with STK terminology and a number of standard STK capabilities such as creating facilities satellites and other vehicles sensors and other objects that can be contained in a scenario In addition you ll learn to set the display of graphis in the Map window and animate the scenario over time 0 Task To build a scenario from scratch 6 Estimated completion time 1 hour Chapters 3 amp 4 Intermediate Skills The goal of Chapters 3 and 4 is to ex
26. the projection type to Miller then click Apply The Map window displays a Miller projection with the map s center at 80 0 longitude KOE 9 120 140 160 180 160 140 120 100 80 gt 60 gt 40 gt 20 D 20 40 BEO B0 e IN Change the Projection Type to Mollweide and click Apply then change it to Sinusoidal and click Apply 418 S Satellite Tool Kit Tutorial More Intermediate SKills Now change the Projection Type to Orthographic the Latitude to 20 0 and leave the Longitude at 80 00 Click Apply Change it to Stereographic and Click Apply EEL en ETE E To see an example of a polar projection select Azimuthal Equidistant then set the Latitude to 90 00 and the Longitude to 0 00 Click Apply Then select Hammer Aitoff and click Apply Satellite Tool Kit Tutorial 4 19 More Intermediate SKills a 3 j h i Sele f a i e ON Meese s E PON RENN ae TA i i f N i A R k B Oo g a ra Ol FN S P 180140120400 280 B 40 20 X 20 2 90 80 HO 200 420 140 160 H i i a 4 f P a Lon 0 000 Lat 90 000 Lon 0 000 Printing Maps The Perspective map projection is a nice 3 D graphic for us to print Set the Projection to Perspective the Orbit Display to ECI Latitude to 0 0 Longitude to 80 0 and the Altitude to 20000 0 When you finish c lick Apply If the i
27. values and click Add Attributes for each of the five levels you added can be set separately In the Level list highlight the first level 0 00 and turn OFF the Label option Now do the same for the remaining levels Turn the Show Elevation Angle Contours option ON then click OK To see the contour levels click the B Reset button in the Map window This Map view is zoomed to provide a better view of the SearchArea area target Satellite Tool Kit Tutorial 2 35 Tutorial40 Earth View 1 si My Tutorial g Lat 33 086 Lon 30 428 Time 1 Nov 1997 00 00 00 00 Paused Sampling Map Projections We can also see the orbits for the satellites in a 3 D perspective In the Browser window highlight the Tutorial40 scenario and select New Map Window trom the Tools menu When the second Map window appears click the button in the tool bar to open its Graphics Properties window Now select the Projection tab 2 36 Satellite Tool Kit Tutorial For the purposes of this tutorial change the Projection Type to Perspective then enter 3 418 as the Latitude 54 99 as the Longitude and 20000 _ PRO Advanced nm as the Altitude Set the 3 D Orbit Display to ECI Earth Centered Inertial Analysis and click Apply to view the changes in the Map window Click OK To display graphics in the Map window it is sometimes necessary to use the Reset button Satellite Tool Kit Tutorial 2 37
28. 1 1578 74 5279 69 0714 71 6591 69 1316 70 0291 70 8318 71 9851 76 3086 Now click the Centroid tab SearchArea Basie Properties a if Boundary Centroid Description Position Type Spherical 1 Auto Compute Centroid Latitude 74 9533 deg Longitude 74 5462 deg Local Time offset from GMT S008 oput Radius 3433 1462149 nm OK Apply Cancel Help Turn OFF the Auto Centroid Compute option Now change the Position Type to Spherical and enter 74 9533 as the Latitude 74 5482 as the Longitude and 3433 1462149 as the Radius When you finish click OK Now let s make sure that the Map window display clearly shows the area target Open the Graphics Properties window for the Iceberg target change the Marker Style to X then click OK Satellite Tool Kit Tutorial 2 39 When the Inherit Settings and Show Label options are OFF no marker or label appears in the Map window for the area target However the perimeter of the area target is shown The center of the area target 1s very close to the Iceberg target marker because the search pattern radiates outward from the area of impact This Map view is zoomed to provide a better view of the SearchArea area target Tutorial40 Earth View 1 a ORS Lat 57 606 Time 1 Nov 1997 00 00 00 00 Paused Let s leave the search efforts for now and do some sensor exercises Adding Sensors In the Tutorial40 scenari
29. 10 Satellite Tool Kit Tutorial In the tab shown here the Show Tool Bar option is ON and the Show Elevation Regions option is OFF For the purposes of this tutorial make sure the Show Tool Bar Show Status Bar and Show Scroll Bars options are ON and the Show Elevation Regions option is OFF When you finish click the Details tab Setting Map Details Now let s set map details The options in the Details tab control the display of land mass and other map features such as the display of latitude and longitude lines in the background and the image resolution of details in the Map window Farth View Map Properties a if attributes Details Projection Images Text Annotation Resolution Lat Lon Lines WwDB2 Coastlines RWDB International Borders RWDB2 Islands RWDB2 Lakes RWDB2 Provincial Borders RWDB2 Rivers Rectangles Image None B Advanced Color black a OK Apply Cancel Help For the purposes of this exercise set the options in the Details tab as follows Satellite Tool Kit Tutorial 2 11 Table 2 2 Map Details options Field Setting Items Highlight RWDB2Coastlines and RW DB2Lakes Make sure that no other option is highlighted in the Items list Lat Lon Lines Turn Latitude and Longitude Lines OFF Background Image Make sure the Background Image field is set to None and the Color is set to Black When you finish click the Projection tab Setting Ma
30. 2 5620 003350 835 461317 j i Close the Report window then click Cancel in the STK Report Tool window 4 16 Satellite Tool Kit Tutorial More Intermediate SKills Map Projections So far we ve used only one of several different map projections available in STK For our next task we re going to experiment with the various map projections available We ll leave the Equidistant Cylindrical Map projection in the original Map window but we ll open a second Map window so that we can compare the two In the Browser window highlight the Tutor2 scenario then select New Map Window from the Tools menu When the second Map window appears click the J button on the tool bar to open the Map Graphics Properties window Select the Details tab As an introductory exercise lets turn the map s latitude and longitude lines ON Now let s review some of the different map projections available in STK Click the Projection tab Earth View 2 Map Properties Attributes Details Projection Images Text Annotation Resolution Type Center Lon 0 000 deg ait SA53 050 om Projection Mercator m OK Apply Cancel Help Change the Projection Type from Equidistant Cylindrical to Mercator and click Apply The Map window displays a different view Satellite Tool Kit Tutorial 4 17 More Intermediate SKills E SIE SSE pe ee Change the Longitude to 80 0 and
31. 400 MB of storage However the data can be read directly from the CD ROM without loading it onto your hard disk This data was originally compiled by the U S Geologic Survey from a variety of sources around the world It has been processed and formatted for optimal performance with STK High Resolution Maps This module contains comprehensive very high resolution mapping data for the entire globe The data includes coastlines rivers lakes and political boundaries at approximately 1 arc second or 30 meter resolution This is ideal for visualizing ground tracks and coverage areas over small geographic regions Special data access algorithms have been incorporated to support rapid visualization of localized map data The data was extracted from the 1995 CIA RWDB2 database and requires almost 200 MB of storage It is formatted for optimal performance with STK Satellite Tool Kit Tutorial 1 11 PRO Terrain PRO Hi Res Maps STK Tutorial 1 12 Satellite Tool Kit Tutorial INTRODUCTORY SKILLS Goal for this Section New users who complete this section will acquire the skills necessary to create and manipulate Satellite Tool Kit STK objects e g scenarios targets vehicles and sensors You ll become familiar with the structure of static and dynamic elements of the STK database and learn how to save objects to and retrieve objects from the database After creating various STK objects you ll learn how to anima
32. AN option to Lon Ascn Node and to change Semimajor Axis to Apogee Altitude before entering the value listed in the table Table 2 9 Orbital elements for the Shuttle Orbital Element Setting Propagator J4 Perturbation Start Time 1 Nov 1997 00 00 00 00 2 32 Satellite Tool Kit Tutorial Orbital Element Stop Time Step Size Orbit Epoch Coordinate Type Coordinate System Apogee Altitude Perigee Altitude Inclination Argument of Perigee Long of Ascending Node True Anomaly When you finish click OK Setting 1 Nov 1997 03 00 00 00 60 0 sec 1 Nov 1997 00 00 00 00 Classical J2000 200 0 nm 200 0 nm 28 5 0 0 151 0 0 0 Changing Object Attributes Once you add the Shuttle satellite parameters you can change the line style and or color of the ground track to distinguish it from other vehicle i e satellites ships aircraft etc ground tracks Highlight the Shuttle in the Browser window right mouse click and select Graphics from the pull right menu Satellite Tool Kit Tutorial 2 33 In the Attributes tab change the Line Style to Long Dash the Marker Style to Plus and click Apply The Map window is updated to display your changes Now select the Contours tab 2 34 Satellite Tool Kit Tutorial Were going to look at elevation angle contours for the Shuttle In the Contours tab make sure the Add Method is set to Start Stop Step then enter O 50 and 10 for the Start Stop and Step
33. ERS1 and click Compute Accesses between the two objects are displayed in the Map window ie ey XX 3 24 SR by Le oy we oh 7 aa A AS D n ma en Py 4s Nay ee Satellite Tool Kit Tutorial Intermediate Skills To close this window select Close from the Files menu Access from Sensor to Sensor So far we ve determined and displayed fairly simple satellite to facility satellite to target and satellite to satellite access Often facilities targets or satellites have one or more sensors attached to them These sensors limit the direction from which another object can successfully access the first object As we learned in Chapter 2 sensors can be either relative or target pointing It is important to remember that a sensor is also defined as an object and can be attached to any facility target or satellite Once the sensor is attached to a parent object we need to define the shape of its beam and the direction in which it is pointing In this exercise we ll add an antenna to the Shuttle assume that it is in the payload bay and point it straight up We ll also add a user antenna to TDRS_4 and point it straight down Then we ll determine access between the two Adding Sensors Were just going to insert both sensors In the Browser window highlight the Shuttle satellite then select Insert from the Files menu Change directories to the tutorial subdire
34. For instance open the Graphics Properties window for ERS1 and select the Pass tab 2 30 Satellite Tool Kit Tutorial To display only the descending side of the orbit change Visible Sides from Both to Descending and click Apply When you finish return the Visible Sides option to Both and click OK Satellite Tool Kit Tutorial 2 31 Now let s add another satellite Click the 4s Satellite icon When the Orbit Wizard appears click Cancel Change the new satellite s name to Shuttle Open the Basic Properties window for the Shuttle and enter the parameters using the procedures introduced for ERS1 and the specific settings provided in Table 2 9 Shuttle Basic Properties a if orbit attitude Pass Break Mass Description Start Time 1 Nov 1997 00 00 00 00 Step Size 60 000 sec Stop Time 1 Noy 1997 03 00 00 0 Propagator J4Perturbation d Orbit Epoch 1 Nov 1997 00 00 00 00 Apogee Altitude yi 200 0000000 nm Coord Epoch Je 2008 3 SeS6 82 Perigee Altitude yi 200 0000000 nm Inclination 28 5000 de Coord Type Classical al A Argument of Perigee 0 0000 deg Coord System J2000 a Lon Ascn Node y 151 0 deg Prop Specific Special Options __Special options True Anomaly y 0 0000 deg OK apply Cancel Help STK automatically converts negative values into their positive counterparts Use the right mouse button and the down pointing arrow to change the detault RA
35. HICS Satellite Tool Kit Software License Agreement Software License Agreement 8 NOTICES Any notices regarding this agreement shall be sent to Analytical Graphics Inc 660 American Avenue Suite 200 King of Prussia PA 19406 9 ACCEPTANCE By opening the accompanying software media you agree to all of the terms of this license Agreement If you do not agree to these license terms and conditions return the software within thirty 30 days of purchase for a refund of the purchase price 10 FREE WIDGET FOUNDATION WIDGET SET COPYRIGHT BY Copyright 1995 BertBos Permission to use copy modity distribute and sell this software and its documentation for any purpose is hereby granted without fee provided that the above copyright notice appears in all copies and that both that copyright notice and this permission notice appear in supporting documentation and that the name of the author not be used in advertising or publicity pertaining to distribution of the software without specific written prior permission The author makes no representations about the suitability of this software for any purpose It is provided as is without express or implied warranty The author disclaims all warranties with regard to this software including all implied warranties of merchantability and fitness in no event shall the author be liable for any special indirect or consequential damages or any damages whatsoever resulting from loss or u
36. ND PERFORMANCE OF THE SOFTWARE SHOULD THE SOFTWARE PROVE DEFECTIVE YOUR ENTIRE AND EXCLUSIVE REMEDY SHALL BE GOVERNED BY PARAGRAPH 3 HEREOF 2 2 SOME STATES DO NOT ALLOW THE EXCLUSION OF IMPLIED WARRANTIES SO THE ABOVE EXCLUSION MAY NOT APPLY TO YOU THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO STATE 2 3 Analytical Graphics does not warrant that the functions contained in the Software will be uninterrupted or error free You are advised to test the Software thoroughly before relying on it Satellite Tool Kit Software License Agreement Software License Agreement 3 LIMITATION OF REMEDIES 3 1 IN NO EVENT WILL ANALYTICAL GRAPHICS OR ITS SUPPLIERS DISTRIBUTORS OR DEALERS BE LIABLE TO YOU FOR ANY DIRECT OR OTHER DAMAGES INCLUDING ANY LOST PROFITS LOST SAVINGS OR OTHER INCIDENTAL SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE SOFTWARE EVEN IF ANALYTICAL GRAPHICS OR ANY AUTHORIZED ANALYTICAL GRAPHICS DEALER HAD BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES NOR SHALL ANALYTICAL GRAPHICS BE LIABLE FOR ANY CLAIM BY ANY OTHER PARTY 3 2 SOME STATES DO NOT ALLOW THE LIMITATION OR EXCLUSION OF LIABILITY FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES SO THE ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY TO YOU 4 TERMINATION The license granted under this agreement is effective until terminated You may terminate this license at any ti
37. S asresten natenn tbh a 2 36 PACING AN AN ea iG E a a a 2 38 PAI SI SOW Se es a E A nee eee 2 40 AnimMmating the SCCRANON ctcazteaacruacdociaag aed chentcedsheted crea cldeaagihebs hack maadetea ives 242 ii Satellite Tool Kit Tutorial Table of Contents Adding Sensors to Targets and Facilities ais aisaadsncannaatensansasuycliinnawsiaseandenr 2 46 EEA E LO E A A E E A T E AEE TEE 2 48 DAW IPG tE SCENI Onura a a e a 2 48 INTERMEDIATE SPIES eena e A T N a ol CE IEE E A ens A E eudadimenn 3 2 peninga Semte ODIE passes eee sa Seo oe ec bende A A 3 3 Changing Orbital Parameters cc ccccecccceeeeeeeee eee e eee eeeeeeeeentesetseetteeeeeeeeees 3 4 ZF TOUS Oi DIVGMNEMS eieaa i E 3 5 FUWEEK OFE DAEMEN eeeenere terre ret er eetcne re eer A tn rete ret rr tere tere rete erence re teeta 3 6 Slay MMe TO SNS NCS arras A EE NAE E E 3 7 Generating a REBO orearen aE EA AA EE EEN 3 8 viewing BDA Iara pR FOr Ees e er ia na ea decade tesla 3 11 Bora aa ee Bs Fea il i ea ena a ee ne ee eee eee 3 14 ED Rev SED AUS ssassn ean na R one beiamae 3 15 Generating Orbits for all Sale INES icccces22 cate aun 08 detanateaalulesdktatcGaluebaotdedacareeaccs 3 16 CCUG ACCES Sas rer Naa ades ind aetna decades eae As 3 18 Access from a Facility or Target to Satellite ras oiatsts aed ie aiee sete esate 3 18 Access MOM satellite to Se CUMS coats sees tecrer ea ostaeetectonrataceiuten e n a 3 22 Access Using Azimuth Elevation and Range AEK
38. Solar radiation pressure which assumes that the satellite is either a mirror sphere or a black body Solar radiation pressure is the same for mirror spheres and black bodies with the same cross sectional area so that users need not specify the characteristics of the satellite The HPOP also takes into account all of the major predictable motions of the Earth that affect the apparent position of the satellite Precession of the equinoxes Nutation Satellite Tool Kit Tutorial STK Tutorial e Diurnal rotation Barycentric displacement In addition the HPOP accounts for the differences among the three primary astronomical time systems Universal Time Coordinated UTC also known as Greenwich Mean Time GMT International Atomic Time TAI Terrestrial Dynamic Time TDT formerly known as Ephemeris Time ET All input and output are expressed in terms of UTC TAI and TDT are used internally to achieve increased accuracy For ultra high precision the HPOP uses the Runge Kutta Fehlberg method of order 7 8 to integrate the equations of motion Long term Orbit Predictor LOP The Long term Orbit Predictor module LOP allows accurate prediction of a satellite s orbit over many months or years This is often used for long duration mission design fuel budget definition and end of life studies For performance reasons it is impractical to compute the long term variation in a satellite s orbit
39. acquire specific information and to graphically represent the results of the manipulations You ll generate orbits review pass and ephemeris data and calculate accesses and AER data You ll also learn to display satellite swaths animate scenarios change map projections and print maps Chapter Contents CEES E EEE E E E E ta E EAE 3 2 BenNNGa ete OE enaa erate ear eerste earner eran ear 3 3 CaO ING FOUN ACUI Sia R tate calasitanied stam netle 3 4 EDISDIAY TIES TOG Satelite texte he ca esate eect aia etic ced eel ea 3 7 Satellite Tool Kit Tutorial 3 1 Intermediate Skills Generating a REDO Ateeee Meee eRe eee ee ate a Seer Pee eee see ene eee ee eee ree 3 8 Viewing Data IN Graph FOrMat eee eeeeecserreeeeeeeeeeeeeeeeeeetentttetteeeeeees 3 11 Dynal DISD of Data axis cat csd aceite edad a e ded dette 3 14 AINIS MP IANNIS setae 1th spate tale AA 3 15 Generating ODIS for all Sate CS ssamen ae E Ra 3 16 CAIGUIAUIAG ACCESS iseiti e isea aa a e R T a aA 3 18 Access from a Facility or Target to SatelliLe scat Seis coedevacusleeadeceaecest a 3 18 ACCESS MONT Sate IIE tO Satele an 3 22 Access Using Azimuth Elevation and Range AEK 00 cee 3 23 PCGESS TOMA SEMSOr tO SENO ner a cst eta an as ieee nates 3 25 USWA ZOO IN eh E cys he 3 26 BENING HS SCC a O A E E E A AE E E E A 3 28 Getting Started The scenario you built in Chapter 2 of this tutorial serves as the basis for performing the analysis tasks in this se
40. anced Skills or if you wish to stop here you should save the scenario 422 Satellite Tool Kit Tutorial ADVANCED SKILLS Goal for This Section With STK access to a target or facility can be constrained by minimum and maximum azimuth angles elevation angles and range A satellite or a sensor can be constrained by minimum and maximum azimuth elevation angles range grazing angles grazing altitudes and ground elevation angles as well as the earth background In this exercise you ll learn to manipulate the constraints for a facility and a satellite sensor If you re unfamiliar with the limits to access discussed here please review the STK User s Manual before beginning This chapter also includes instructions for displaying a ground sensor at a designated altitude Well wrap up the tutorial by looking at lighting conditions lighting data and lighting graphics during animation investigating sensor swath animating a scenario involving a missile launch and customizing a report Satellite Tool Kit Tutorial 5 1 Advanced Skills Chapter Contents RO AUTOR dip SSOP stesso E E EE 5 ST ONS sen E E S 5 2 GIST SHAW Gores E S TETE ETETE TETT TE 5 2 Facility and Target Constraint 2 2 2 ee ee eeeeecerereeeeeeeeeeeeeeeeeeeennnnenteteeeees 5 3 scing eC UE CONSTA ES street ete attache eee 5 5 seting Up me Assogated ODE airiran inira reen annA NEE ta ve Trane 5 6 SAIGON TING MeEACCESS snetrinite steniarsceali
41. anging the Size of Windows 2 5 Constraints Facilities __5 3 Basic 5 6 sensor 5 1 0 Targets _______5 3 Index D Data Management 7 Data Visualizatlon c 1 7 Diurnal Rotation _ 1 8 E Ephemeris Time ET _ 1 9 F Facilities _____ 2 14 Basic Properties Position _ 2 15 Text Annotation 2 16 Constraints 5 3 Basic 5 6 New HW 2 14 G Generating 24 Hours of Ephemeris3 5 Generating a Full Week of Ephemeris 3 6 Generating a Report _3 8 Generating Orbits for All Satellites3 16 Graphs 3 1 Gravitational Effects 1 8 Greenwich Mean Time GMT 1 9 H Harris Priester Atmosphere Model 1 8 High Resolution Maps Module 1 1 1 HPOP Module _ _ __ 1 7 Intermediate Skills _3 Intermediate Skills in STK 1 3 International Atomic Time TA 1 9 Introductory Skills in STK 1 3 J Joint Gravity Model JGM 1 8 L Lifetime Module _ 1 10 Lighting ___ _ 5 20 AER Report 5 26 Animation 5 24 Reports _ 5 23 Long term Orbit Predictor See LOP LOP Module 1 9 M Map Attributes 2 10 Map Backgro
42. ar accesses from the Map window Highlight the Tutorial40 scenario in the Browser window right mouse click and select Remove Accesses from the menu that appears All accesses are cleared from the Map window Access from Satellite to Satellite We now want to find out when two satellites have access to each other In our next exercise we ll determine when the Shuttle has access to TDRS 4 3 22 Satellite Tool Kit Tutorial Intermediate Skills Open the Access window for the Shuttle satellite highlight TDRS_4 in the Associated Objects list and click Compute Access between the two objects displays in the Map window Also look at the access constraints in the second Map window showing the Perspective view E Tutorial40 Earth View 1 ala asaan ee G j Lat 0 000 Lon 0 000 Time Step 6 Time 1 Nov 1997 00 00 00 00 Paused Lets get ready for the next exercise by clearing our choices in the Access window Highlight TDRS_4 in the Associated Objects list and click the button Keep the Access window open for our next task Access Using Azimuth Elevation and Range AER In our scenario we have two satellites in a Low Earth Orbit LEO the Shuttle and ERS1 Our next task is to determine when they have access to Satellite Tool Kit Tutorial 3 23 Intermediate Skills each other and what the azimuth elevation and range is between the two satellites during access times In the Access window highlight
43. as the mission type Click Perform Search When the Satellite Database Search Results window appears select SYNCOM 2 ssc 00634 and click OK then click Cancel in the Satellite Database window Now open the SYNCOM_2 s Basic Properties window and change the Start Time to 1 Nov 1997 00 00 00 00 the Stop Time to 2 Nov 1997 00 00 00 00 and click OK Notice the ground track of the SYNCOM satellite 1s a defined figure eight in the Map window The last satellite we re going to add to this scenario is a satellite in sun synchronous orbit In the Browser window click the satellite icon When the Orbit Wizard appears click Next In the next window select Sun 414 Satellite Tool Kit Tutorial More Intermediate SKills Synchronous and click Next We ll leave the default settings for this satellite so continue through the Wizard Animating the Scenario To animate the scenario simply click the gt in the tool bar at the top of the Map window Use the buttons on the Map tool bar refer to Table 4 1 at the top of the Map window to control map animation Click m to stop the animation Table 41 Tool bar buttons Print the Map window ce Animate in forward sequence Decrease time step Move forward one step Reverse one time step Increase time step Play in reverse Zoom in magnify Click and hold the left mouse button then drag the mouse Stop and reset Resize to 2 1 aspect ratio Measure distance betw
44. b cd m City Hame Province State Latitude Miri cl fede ceeds 2 oe eee S Longitude Mlin oo REH gi Bieta E ER at a ay wha ERP RHE fied Country Brazil l City Type Administration Center Perform Search Turn the Country option ON and select Brazil then turn the City Type option ON and select Administration Center Click Perform Search Satellite Tool Kit Tutorial 4 13 More Intermediate SKills Province State Country Lat deq Lon deg Alagoas Brazil 35 7167 Amazonas Brazil 3 60 0109 Rio Grande do Norte Brazil A 35 2167 Rondonia i 63 9000 Pernambuco i 5 34 9000 Tii anelro Rio de Janerio Braz 22 9062 43 1748 Rio Branco Acre i 5 67 8000 Salvador Bahia i s 38 5167 Sao Luis Maranhao i 44 2667 Sao Paulo Sao Paulo i p 46 5823 Teresina Piaui i 42 8167 Miracema do Tocantins Tocantins i f 48 3586 Matches Found Select All Deselect an Unique REE H Selected Create Constellation Creation Class Facility Create Constellation ee When the City Database Search Results window appears select Rio de Janeiro in the list of cities and click OK then click Cancel in the City Database window Now let s add a few more satellites to the scenario Make sure the Tutor2 scenario is still highlighted and select Satellite Database in the Tools menu In the Satellite Database window turn the Mission option ON then select Comm Civil
45. before you remove them from the scenario If you don t save them they won t be available for other tasks It s time to clean up the Tutorial40 scenario Search efforts for the survivors of the Cruise ship mishap were successful All passengers and crew members have been rescued and a majority of the equipment was salvaged As a result we need to update the Tutorial40 scenario to reflect the changing circumstances In the Browser window highlight the Cruise ship and select Remove from the Files menu The ship has been removed from the scenario Use these same directions to remove the SearchArea area target from the scenario Saving the Scenario Before proceeding to Chapter 3 Intermediate Skills or if you wish to stop here you should save your new scenario Highlight the Tutorial40 scenario in the Browser window and select Save from the Files menu The system saves the scenario and all objects created for and inserted into the scenario To exit STK select Exit from the Files menu 2 48 Satellite Tool Kit Tutorial QUIT Are You Sure All unsaved data will be lost At the Confirm window click OK or Cancel to return to the current STK session Satellite Tool Kit Tutorial 2 49 2 50 Satellite Tool Kit Tutorial INTERMEDIATE SKILLS Goal for this Section The objective of this section is to learn how to propagate and analyze satellite orbits to manipulate the components of a scenario to
46. bit Wizard appears click Next then select Molniya and click Next O Satellite Tool Kit Tutorial 5 19 Advanced Skills In the Molniya Orbit Wizard window make sure the Apogee Longitude is set to 100 00 and the Perigee Altitude is set to 5000 meters Click Next In the next Orbit Wizard window change the Start Time to 1 Nov 1997 00 00 00 00 the Stop Time to 2 Nov 1997 00 00 00 00 and the Step Size to 60 seconds Name the new satellite Molniya EEE Lat 21 111 Lon 176 444 Time Step 100 00 sec Time 1 Nov 1997 00 00 00 00 Paused 5 20 Satellite Tool Kit User s Manual Advanced Skills Setting Up the Lighting Attributes Now open the Graphics Properties window for the Tutor4 scenario and click the Sun Lighting tab Set the Sunlight properties as shown in the table below Make sure the options are turned ON Table 5 1 Sunlight properties settings Field Setting Subsolar Point Set the Color of the Subsolar Point to Yellow and the Line Marker Style to Circle Sunlight Penumbra Set the Color of the Sunlight Penumbra to Red Line Style to Solid and Line Width to 3 Penumbra Umbra Set the Color of the Penumbra Umbra to Magenta Line Style to Solid and Line Width to 3 When you finish click OK then click Reset a on the Map window tool bar to display the new Sun lighting graphics ag Notice the small circle on the far right side of the Map window beneath the Walker 1 d 7 A satellite designating
47. click Apply The Map window displays the new Sun lighting graphics FR Ld PL ad ca fe mr 7 Ey F T d KA a Si Lat 44 667 Lon 176 000 Time Step 100 00 sec Time 1 Nov 1997 00 00 00 00 Paused 5 24 Satellite Tool Kit User s Manual Advanced Skills Now click the Animate Forward gt button in the tool bar to animate your scenario Notice how the area that shows lighting for the Molniya satellite changes in size and shape a E aja ajanjaj eleen AJ Lat 45 111 Lon 176 444 Time Step 100 00 sec Time 1 Noy 1997 00 36 20 00 Paused Click the Reset m button to stop the animation In the Lighting window click the AER Data button to access a Lighting Report with AER data Satellite Tool Kit Tutorial 5 25 Advanced Skills E Report MOiniya Solar AER Files Edit 7 Jul 1997 00 33 07 Satellite MOlniya ECIVVLH Solar AER Azimuth deg Elevation deg Range m 148481167725 835600 148481090253 197390 148481032686 242460 148480994870 511630 148480976387 466190 148480976583 478970 148480994608 764250 148481029461 945770 148481080035 649380 148481145159 888340 148481223640 399690 148481314290 576420 148481415956 496340 148481527535 299350 148481647987 615260 148481776344 998110 148481911713 381130 148482053273 482030 148482200279 114200 148482352053 825380 148482507986 780000 148482667528 029970 1 1 1 1 a 1 1 1 1 T 1 1 1 1 1 1 il
48. ction Before you begin make sure that the Tutorial40 scenario we created in Chapter 2 is open in STK If the Tutorial40 scenario is currently open skip ahead to the section entitled Defining a Satellite Orbit you re ready to begin this exercise If another scenario is open close it by highlighting the scenario s name in the Browser window then selecting Close from the Files menu When you first open STK a Startup Wizard appears If you ve recently completed the first exercise on this tutorial the Tutorial40 scenario should be listed in the Last Loaded Scenarios list in the Startup Wizard Double click on the Tutorial40 scenario in the list to open it in STK 3 2 Satellite Tool Kit Tutorial Intermediate Skills If the scenario isn t in the list click Cancel in the Startup Wizard then select Open from the Files menu make sure you re in the tutorial subdirectory and select Tutorial40 sc The Browser window and Map window are shown here for reference Satellite ToolKit ai File Edit Properties Tools Window S A STK S 4 Tutorial4o EA SearchArea a Baikonur cussions ten vasaaeecanielaretenin aan iniaianeeiartienial ieee aneneoa anager anaeiinaee aun nena nea ane ammennaaanen ane ennannmneenaael av Perth E Tutorial40 Earth View 3 a z Santiago a 4 a 4 1 ml of 2 2 2 5 Wallops a 72 FiveDegElev E y WhiteSands 72 FiveDegEley 6 ERS1 72 Downlink 72 Horizon
49. ctory the directory where you originally saved this scenario change the File Type to Sensor and highlight antenna sn Click OK Select the TDRS 4 satellite in the Browser window and follow the same procedure to insert the UserAntenna Satellite Tool Kit Tutorial 3 25 Intermediate Skills Determining Access Between the Sensors Our next task is to determine the access between the Shuttle s Antenna and the TDRS s UserAntenna Make sure that UserAntenna is still highlighted in the Browser window right mouse click and select Access from the menu that appears Highlight the Shuttle s Antenna sensor in the Associated Objects list and click Compute You may need to expand the object tree for both the TDRS and Shuttle satellites so that you can see the attached sensors in the Associated Objects list Notice that the ground tracks for both satellites are highlighted when there is access however the TDRS 4 satellite s ground track is small Let s zoom in on this area for a closer look Using Zoom In many analysis situations there may only be a small portion of the map that is of interest STK provides you with infinite Zoom capability In addition if you have the High Resolution Maps module you can switch among maps as you zoom in closer to the Earth This exercise assumes that the full installation of High Resolution Maps is installed on your system or network If you don t have the HiResolution Maps modu
50. e Style is Solid Click on Projection Set the Minimum Altitude to 100 0 nm the Maximum Altitude to 500 0 nm and the Step Count to 5 When you finish click Apply The Map window displays the sensor pattern at altitudes of 100 200 300 400 and 500 nautical miles Now zoom in over the Baikonur facility for a closer look Tutor3 Earth View 3 ae ais s ul i imi 15 1 212 Z Ei EEE A Lat 44 976 Lon 148 929 Ss Time 1 Nov 1997 00 00 00 00 Paused Next let s display our pattern at only the ERS1 altitude which we know is located at approximately 424 0 nm as defined by ERS1 s orbital elements In the Projection tab of the Graphics Properties window change the Min Altitude to 0 0 Max Altitude to 424 0 and the Step Count to 1 then click OK 5 14 Satellite Tool Kit User s Manual Advanced Skills SB 4 ac 0 af of gt gt 2 2 a c Lat 33 757 Lon 145 310 Time 1 Nov 1997 00 00 00 00 Paused We can now display the access from Baikonur s uplink sensor to the ERS1 satellite Open the Access window for the Uplink sensor select ERS1 in the Associated Objects list and click Compute then click Cancel Now zoom out to return to the normal Map view The Map window is updated to display access graphics for the area within the sensor s range ajsajamm eea SS ay eal Time 1 Nov 1997 00 00 00 00 Paused Satellite Tool Kit Tutorial 5 15 Advanced Skills Clean U
51. e quite complex For instance you may have a constrained facility and perform an access with a constrained satellite or satellite sensor by setting constraints for both objects Now let s clean up the display before proceeding to the next exercise Remove all accesses tor the Horizon sensor so that access graphics are cleared from the Map window To prepare for the next exercise set the propagated orbit to 24 hours for all objects Open ERS1 s Basic Properties window change the Stop Time to 2 Nov 1997 00 00 00 00 and click OK Displaying a Ground Sensor Pattern at a Specified Altitude In this section we ll add an uplink sensor to the Baikonur facility and display the defined pattern at a designated altitude In the Browser window create a new sensor named Uplink and attach it to the Baikonur facility First we need to define the sensor and identify where it s pointing Open the Basic Properties window for the Uplink sensor 5 12 Satellite Tool Kit User s Manual Advanced Skills Set the Sensor Type to Half Power change the Frequency to 1 00 GHz and the Diameter to 0 185 m When you finish click the Pointing tab Make sure the Pointing Type is set to Fixed then change the Azimuth to 120 0 and the Elevation to 5 0 Click OK Satellite Tool Kit Tutorial 5 13 Advanced Skills Now open the sensor s Graphics Properties window and change the Color to Red and the Line Width to 3 and make sure th
52. eek of Ephemeris Great Arc 2 23 Attitude _ 2 24 Lightng 5 20 New 2 23 5 17 Orbit ____ _ 3 3 Orbiting _ 2 26 Orbits _ 3 1 6 Changing Parameters 3 4 Swath 4 5 TDRS 2 27 W Walker Constellation 5 17 5 19 Z Zoom 3 26 Satellite Tool Kit Tutorial We d love to hear from you At AGI we work hard to provide quality products and services that meet your needs and expectations Your comments are an important part of our success If you have any suggestions please contact us via the World Wide web at www stk com or e mail us at info stk com For our reference please include the following information along with your response Product Version Platform O UNIX CI PC O VAXNVMS Type Manual Title ID Overall Rating of Manual O Very Good OU Good UO Satisfactory UO Fair O Poor Comments Suggestions Name Title Company Address We appreciate your suggestions and will consider each response carefully Thank you Analytical Graphics Inc 660 American Avenue King of Prussia PA 19406 610 337 3055 800 220 4785 Fax 610 337 3058 7 E Mail info stk com
53. een E Open the Map Properties window two points Click on this button then click and drag EE Sy ES ES the mouse between the points Satellite Tool Kit Tutorial 4 15 More Intermediate SKills Generating Combination Reports STK gives you the ability to generate a single report that summarizes different objects For instance you could generate a report that summarized specified data for facilities targets and satellites We re going to generate a report that shows the position of the Santiago facility Rio de Janeiro and the Hubble satellite To do this highlight all three in the Browser right mouse click and select Report from the menu that appears In the STK Report Tool window select Fac and Vehicle Position in the Styles list then click Create Report Tutor Fac and Veh Position aif Files Edit Help A 1 Jul 1997 21 28 22 Scenario Tutor2 Facility and Vehicle Position J Santiago Facility Position x km y km z km 1769 688666 5044 488713 3468 410537 Rio_de_Janeiro Facility Position x km y km z km 4286 761543 4021 993295 2467 155176 Hubble Vehicle ECF Position Time UTCG x km y km z ikm 31 Oct 1997 23 59 59 00 2773 548283 6391 009786 24 441127 1 Nov 1997 00 00 59 00 3107 325101 6232 885305 192 687781 1 Nov 1997 00 01 59 00 3429 422090 6051 217980 408 994832 1 Nov 1997 00 02 59 00 3738 680220 5846 673113 623 557584 1 Nov 1997 00 03 59 00 4033 98932
54. er Style so that it displays the facility icon Click OK The Browser and Map windows are updated My Tutorial 2 ee a a A E zje ols elolr D When objects are inserted using any of the databases shipped with STK descriptions are automatically generated for the objects Lets look at the 2 20 Satellite Tool Kit Tutorial description generated for the Santiago facility Open the Basic Properties window for the Santiago facility and select Description Santiago Basic Properties aif Position AzEIMask Atmosphere Description Short Description Long Description site Name Santiago Network NASA DSN Latitude 33 15137 deg East Longitude 70 6663 deg Altitude 703 2 m OK apply Cancel Help Notice that the Long Description field includes position and other data associated with the facility Click OK Creating Targets The target for this exercise is a glacier field over North America Click the Target icon in the lower portion of the Browser window then click in the new target s name change it to Iceberg and press Enter 4 The Browser window is updated to include the new target Select Basic from the Properties menu Satellite Tool Kit Tutorial 2 21 Setting the Target s Position amp Description The first tab in the Basic Properties window is the Position tab iceberg Basic Properties a jC Position AzEIMask Atmosphere Description Positi
55. ever is significantly simplified since the inclusion of the higher order terms doesn t impact orbit decay estimates This allows significant performance advantages and provides a quicker turn around for the analyst User inputs include an initial orbit and satellite mass area and drag coefficient The program implements the Jacchia 1971 atmospheric model to compute the drag effects Additionally Lifetime considers the effects of the Earth s oblateness through J5 solar and lunar gravity and solar radiation pressure when computing the orbital perturbations The module is based on algorithms developed at NASA s Langley Research Center 1 10 Satellite Tool Kit Tutorial STK Tutorial Terrain The Terrain module provides precise three dimensional 3 D terrain elevation data for the entire globe When used with STK Terrain exploits sophisticated multi dimensional interpolation algorithms to provide accurate 360 azimuth elevation masks for satellite access calculations from any point on the Earth s surface These algorithms also provide altitude information for user defined facilities and ground based targets For users of the VO module Terrain allows a vivid 3 D visual depiction of the Earth s true surface relief and its effect on satellite accesses The data has a resolution of less than 30 arc seconds or approximately 1 kilometer at the Earth s surface In its compressed format the complete data set requires over
56. g the Strip Chart tool Make sure ERS1 is still highlighted in the Browser window then select Strip Chart from the Tools menu In the STK Strip Chart Tool window highlight the style entitled Solar AER in the Styles list and click Open No information displays because the scenario isn t animating To view data over time click the gt Animate Forward button in the Map window tool bar ERS1 solar azimuth elevation and range data appears Satellite Tool Kit Tutorial 3 15 ag X Z i A Hint Intermediate Skills Strip Chart ERS Solar AER Files Edit Satellite ERS1 ECIVVLH Solar AER Distance 1464635000 148462000 148461000 1 Nov 1997 01 00 01 00 1 Noy 1997 01 30 01 00 1 Nov 1997 02 00 01 00 Time UTCG Azimuth deg Elevation deg Range km Clicked At x 1 Noy 1997 01 29 29 24 Y Y2 148480176 00 5 5 Restore Nearest Point x 1 Nov 1997 01 30 01 00 Y Y2 148480256 00 Range km If the data is changing too quickly too read use the K Decrease Animation Time Step button in the Map window tool bar to slow the animation time To exit the Strip Chart select Close from the Files menu then click Cancel in the STK Strip Chart Tool window Generating Orbits for all Satellites In the first part of this exercise we altered the propagation of only one satellite s orbit You may want to propagate all of the satellites in a scenario for the same amount of time The Time Period
57. ghlight the unit of interest in the Units list then select the correct unit in the Change Unit Value list To select an item from a list click the item so that it is highlighted To deselect it click the item again until it is no longer highlighted Table 2 1 Tutorial4O unit settings Field Setting Distance Unit Nautical Miles nm Time Unit Hours Date Format Gregorian UTC Angle Unit Degrees deg Mass Unit Kilograms kg Power Unit dBW Frequency Unit GHertz GHz SmallDistanceUnit Meters m LatitudeUnit Degrees deg Satellite Tool Kit Tutorial 2 9 Field Setting LongitudeUnit Degrees deg When you finish click OK Setting Graphics Properties Parameters for map graphics control the display of data and the functions available in the Map window To set the graphics properties for the scenario click the S button on the Map window tool bar to open the Map Properties window for the Map Setting Map Attributes Map attributes control the display of data such as orbit paths object names ground tracks and other satellite data You can also control the display of the tool bar at the top of the Map window and other selections through this window Earth View Map Properties a if attributes Details Projection Images Text Annotation Resolution Map Display Options E Show Tool Bar E Show Status Bar E Show Scroll Bars Show Elevation Regions OK Apply Cancel Help 2
58. go facility In the Basic tab of the Constraints Properties window that appears change the Min Azimuth Angle to 60 0 Minimum Elevation Angle to 20 02 Maximum Range to 500 0 nm Minimum Azimuth Rate to 180 00 per second Make sure each option is ON Click Apply STK recalculates the access and displays an updated Map window 5 8 Satellite Tool Kit User s Manual Advanced Skills TET i is i Oe aM nts NY WK ue AON a oh E a iN NAN OS NY OM SOK XVX Experiment with different access constraints as you wish When you finish make sure all constraints are OFF and click OK The Map window displays full horizon to horizon access UU ih i ihe We it hia at Hiv Hi fin 4 W Wo o Mw MK Wy V N Me J W AVY ROOK Wy VA M o KY NY me Before continuing clear the Map window of access graphics Open the Access window for the Santiago facility click the Remove Access button then click Cancel Then Zoom Out to the normal Map view Satellite Tool Kit Tutorial 5 9 Advanced Skills Satellite Sensor Constraints Our next task is to constrain access to a satellite sensor Well use the Horizon sensor attached to the ERS1 satellite Begin by looking at an unconstrained access to the Horizon sensor Open the Access window for the sensor select Baikonur as the Associated Object and click Compute Tutor3 Earth View 3 a iL centenarians wi SOPRA OPS
59. he icon and name the new planet Jupiter To set the properties of the planet open its Basic Properties window Jupiter Basic Properties Definition Description m Ephemeris Source JPL DE403 Jupiter 4 w Analytic w File Radius 0 0000 nm OK Apply Cancel Help eee In the Definition tab select JPL DE 403 then highlight Jupiter in the menu and click OK Now we re going to add the Hubble space telescope to our scenario Select Insert from the Files menu then change the File Type to Satellite and select Hubble sa in the tutorial directory When you save an object in STK STK saves the object itself and any subobjects such as sensors receivers transmitters attached to the object In this instance a sensor is attached to the Hubble telescope and is inserted along with the satellite Note Satellite Tool Kit Tutorial 4 3 More Intermediate SKills The Map window displays the new satellite and a sensor that was attached to the Hubble My Tutorial 4 _ ____ We want this sensor to point at Jupiter To do so change the Pointing Type to Targeted and the Boresight Type to Tracking Now select Jupiter in the Available Targets list and use the to copy it the Assigned Targets list When you finish click OK 44 Satellite Tool Kit Tutorial More Intermediate SKills Were now ready to determine access between the Hubble s Senso
60. her window in STK so that data and graphics appear in their entirety click and hold a corner of the window and drag it to the size you wish Propagating TDRS Orbits Now we re going to propagate the orbit of the second TDRS satellite Open the Basic Properties window for the TDRS 4 satellite In the Orbit tab make sure the Start Time is set to 1 Nov 1997 00 00 00 00 and the Stop Time to 2 Nov 1997 00 00 00 00 Make sure that the Step Size is set to 60 seconds then click OK Satellite Tool Kit Tutorial 2 27 ay gt E La a Hint Warning ag Lg k d Hint The ground tracks for both satellites display in the Map window as specks since they are in geostationary orbit To better see both satellites in the Map window make sure both satellites are highlighted click the right mouse button and select Graphics from the menu that appears In the Graphics Properties window select the satellite icon as the Marker Style Click OK Jutorial40 Earth View a if o nn aS ate FON Es konur mise ENN SE ie My Tutorial ees _ ee l E Lat 5 172 Lon 177 414 l Time Step 0 Time 1 Noy 1997 00 00 00 0 Paused A Adding more satellites In the Browser window click the 4 Satellite icon When the Orbit Wizard appears click Cancel Change the new satellite s name to ERS1 The orbital element sets for these satellites are fictitious and do not represent the true o
61. if not followed They are identified by the heading Warning and a icon in the outside margin STK Professional Features Some of the features and functions described in this manual are available only with the STK PRO software suite or with individual add on modules that address your requirements Because these functions are embedded in the STK application they are presented in this manual However they can be identified by the STK logo A in the outside margin The modules available as part of the PRO suite or as individual add on modules are Satellite Tool Kit Tutorial 1 5 PRO Advanced Analysis STK Tutorial Advanced Analysis The Advanced Analysis module AAM provides a package of advanced features and tools that dramatically extend the capability of STK This module is designed to meet the requirements of satellite systems engineers performing a wide variety of specialized analysis tasks Specifically these features offer advanced functionality in five areas attitude simulation and targeting sensor definition and constraints astrodynamics data visualization and data management Attitude Simulation amp Targeting Attitude simulation and targeting features allow users to define a vehicle s attitude by 1 using one of fifteen pre defined pointing profiles 2 numerically integrating the torques operating on the vehicle s physical mass matrix or 3 defining its orientation relative to a specified
62. inting 2 42 2 44 Constraints _ 5 1 0 Displaying Sensor Patterns 5 13 New 2440 243 2 46 5 13 Sensors 2 42 Solar Radiation Pressure 1 8 Specular Reflection 1 8 Starting STK _ 2 3 STK Application Properties 2 6 STK PRO 1 5 Advanced Analysis 1 6 High Resolution Maps Module 1 1 1 HPOP Module _ 1 7 Lifetime Module 1 10 LOP Module _ 1 9 Terrain Module _ 1 10 Sun Lighting ___ 5 22 Swath Sensor 5 27 Vehicles 4 5 T TAI See International Atomic Time Targets 2 21 New 2 21 Satellite Tool Kit Tutorial Index Targets Basic Properties Position ______ 2 22 Constraints ________5 3 Terrain Module _ 1 10 Terrestrial Dynamic Time TDT 1 9 Text Annotation _ 2 1 3 Tool Bar ___ 15 5 22 5 26 Tools Access _ _ 3 18 Graphs 3 1 Lighting _ 5 20 Reports 3 8 Swath 5 27 Vehicles _4 5 Walker 5 19 U Universal Time Coordinated UTC 1 9 V Vehicles 2 23 24 Hours of Ephemeris 3 5 Basic Properties _5 7 5 17 3 6 Graphics Properties 2 30 2 33 Full W
63. itude i SHE jH git Longitude Altitude Network NASA DSN Perform Search Cancel Turn the Network option ON and select NASA DSN as the Network Now click Perform Search 2 18 Satellite Tool Kit Tutorial Goldstone 34HEF Goldstone34STD Goldstone70 Guam46 Kauai46 Madrid26 Madrid34HEF Madrid34sToD Madrid70 MerrittIsland Select All Deselect anf Network NASA DSN NASA DSN NASA DSN NASA DSN NASA DSN NASA DSN NASA DSN NASA DSN NASA DSN NASA DSN NASA DSN Create Creation Class Facility 35 2403 35 1186 35 2444 13 6025 21 5669 40 2403 40 2372 40 2389 40 2414 28 4247 33 1514 34 5000 Facility Database Search Results Lat deg Lon deg Alt m 243 1128 243 1944 243 1106 144 8508 158 2519 355 7486 355 7486 355 1511 355 7519 80 6646 0 00 Matches Found Unique Selected Create Constellation Cancel l Help When the Facility Database Search Results window appears scroll to the bottom of the list then highlight Santiago and WhiteSands in the list and click OK In the Facility Database window click Cancel In the Browser window highlight Baikonur press and hold the key and highlight each of the other facilities all five facilities should now be highlighted then right mouse click and select Graphics from the menu that appears Satellite Tool Kit Tutorial 2 19 In the Attributes tab change the Mark
64. le installed the level of detail pictured here dont display as you zoom closer To set parameters for switching among map resolutions click the button on the Map window tool bar and select the Resolution tab 3 26 Satellite Tool Kit Tutorial Intermediate Skills Turn the Use option ON then select the Details tab In the Details tab click Advanced then select all of the options for Rivers and Lakes and change the Display option to YES Click OK In the Details tab click Apply Now click the Zoom In button on the Map window tool bar For this exercise click in the Pacific Ocean just below California hold down the mouse button and drag the cursor so that box encompasses all of South America Repeat this process until you are zoomed in over the middle of South America at a distance of approximately 2 nautical miles As you zoom Closer and closer the resolution of the Map changes The type of Map being used 1s displayed in the bottom of the Map window to the left of the animation time Tutoriala0 Earth View 3 a PE a a pa pa a Ea l A z Bam E AS A S i ae P i FO ee a ee ee at 2 280 Lon 56 256 Super High 11 Time 1 Nov 1997 00 00 00 00 Paused Now turn OFF all Rivers and Lakes in the Details tab and click Apply Use the Zoom Out button as many times as necessary to return the Map window to a normal view then turn the Use option in the Resolution tab OFF and click OK
65. list and use the P to copy it the ae Assigned Targets list Repeat this procedure until all of the facilities appear in the Assigned Targets list When you finish click OK To remove an object that appears in the Assigned Targets list use the button To display the new data we need to animate the scenario Use the Animate Forward gt button to begin animation and let the animation run until the ERS1 satellite moves over the Santiago facility You can see the Downlink sensor appear and disappear as facilities come in and out of the field of view The Map window shows the Downlink sensor as it passes over the Santiago facility Futorial40 Earth View asaan oee 2 Lat 13 446 Lon 172 759 Time Step 60 Time 1 Nov 1997 01 01 01 00 Paused When you finish click Reset m to stop the animation and reset it at the animation start time Satellite Tool Kit Tutorial 2 45 PRO Advanced Analysis Note Adding Sensors to Targets and Facilities When specifying targets and facilities you may want to limit access to a particular target or facility by more than the horizon limit To demonstrate this type of sensor create a sensor named FiveDegElev and attach it to the Wallops facility To set the properties for the new sensor open its Basic Properties window er O In the Definition tab select Conical and set the Inner Half angle value to 0 0 and the Outer Half angle value to 85 0 Leave
66. llite Tool Kit Tutorial 3 11 Intermediate Skills In the STK Graph Tool window highlight the graph style entitled Solar AER in the Styles list and click Create to view the data A window displaying ERS1 solar azimuth elevation and range data in graph form appears she V oe ANAAAAAA HWA poy V e AIVI ASA JAAS Tar STATAT c Time UTCG 0 i ogodido j Azimuth deg Elevation deg Range km 3 12 Satellite Tool Kit Tutorial Intermediate Skills You can click a point in the graph to display its X and Y coordinates as well as the Nearest X and Y Data Points The text box on the far bottom right of the window shows the data element selected Let s change the color of one of the data elements in the graph Select Attributes from the Edit menu A Graph Attributes window appears Attributes Graph Solar AER Element Title Elevation deg Azimuth deg Width 2 af Color purple1 Style None af oze Ka zs In the Element list select Elevation then change its color to blue Click OK The graph display and legend are updated To exit the Graph select Close from the Files menu then click Cancel in the STK Graph Tool window Satellite Tool Kit Tutorial 3 13 Intermediate Skills Dynamic Display of Data Let s see what the solar azimuth elevation and range data looks like dynamically STK allows you to view data dynamically during animation so that yo
67. mages are not printing properly check the Printer Setup using the Print Setup Reports option from the Files menu This command should be set to the same command you would use from a command line to print a PostScript file If you don t know what the setting should be consult with your System Administrator In the Map window click the amp button on the left hand side of the tool bar The following image should be at your printer x i aoe eksonis enrabneg PAATE RE e i O Q _Janeiro Be F 3 420 Satellite Tool Kit Tutorial More Intermediate SKills To prepare for the next exercise let s clean up the STK environment by setting the Latitude to 0 0 Longitude to 0 0 and the Projection back to Equidistant Cylindrical Then go back to the Details tab and reset the Lat Lon Lines so that they don t show and click Apply Map Backgrounds You can also apply a different background to display in the Map window In the Details tab set the Background to AGI1024 xpm and click OK The Map window now displays a textured background Tutor Earth View Bl aja ial eaaa ae anrr f cs ss Ss Lat 77 566 Lon 171 724 Time You can display a personalized map background in the Map window or use one of the background images shipped with STK Satellite Tool Kit Tutorial 4 21 More Intermediate SKills Saving the Scenario Before proceeding to Chapter 5 Adv
68. me by destroying all copies of the software in your possession and providing written notice of such termination and destruction to Analytical Graphics The license granted under this Agreement will terminate if you violate any of the terms and conditions of the Agreement You agree upon such termination to promptly destroy all copies of the Software in your possession and to certify in writing to Analytical Graphics that such action has been taken Satellite Tool Kit Software License Agreement Software License Agreement 5 LAW TO GOVERN This Agreement shall be governed by the laws of the Commonwealth of Pennsylvania 6 NO TRANSFER None of your rights duties or obligations under this Agreement may be sold sublicensed assigned rented leased loaned or otherwise transferred without the prior written consent of Analytical Graphics and any attempt to so sell sublicense assign rent lease loan or transfer without Analytical Graphics prior written consent is void 7 YOU ACKNOWLEDGE THAT a YOU HAVE READ THIS ENTIRE AGREEMENT AND AGREE TO BE BOUND BY ITS TERMS AND CONDITIONS b THIS AGREEMENT IS THE COMPLETE AND EXCLUSIVE STATEMENT OF THE UNDERSTANDING AND CONTRACT BETWEEN US AND SUPERSEDES ANY AND ALL PRIOR ORAL OR WRITTEN COMMUNICATIONS RELATING TO THE SUBJECT MATTER HEREOF AND c THIS AGREEMENT MAY NOT BE MODIFIED AMENDED OR IN ANY WAY ALTERED EXCEPT BY A WRITTEN AGREEMENT SIGNED BY BOTH YOU AND ANALYTICAL GRAP
69. nacadenshaitenienitasdansagnteindsadinahaitenenttadde 5 Satellite Sensor CONStIAINTS 2 2 2 eee eeeeeeeeceeeeeeeeeeeeeeeeeeeeeeetntneceeteeeeeeeeeeeeeteee 5 10 summon an crag yee rerrnme ste er nem errerrn te tr rrrte ren em nrrrr er te 5 12 Displaying a Ground Sensor Pattern at a Specified Altitude ee 5 12 RNS o E snp rate eget A ETT 5 16 Generating a Walker Constellation siiccitiatisdescineniataravicitiaanuccnsiianiapintineadacaviess 5 16 Ea E e E A E AA A T E E A E 5 19 Seting Yp me Ee giclee ADUT sesa rR 5 2 Efelgt gegPUilgepa ages Camere te rt ere eee ers 5 23 RNS IO acres E nites cimaeciatsastseaip E 5 26 SSO A sen ect eee circa ets ap ben shee ce eae E tc enbachaneteerae 5 26 FPN NOE Sareea career E E E E E 5 28 Getting Started lt Install Dir gt indicates the directory name in which STK files were loaded at installation For this section of the tutorial we are going to use a number of objects already created in the previous chapters 5 2 Satellite Tool Kit User s Manual Advanced Skills Before you begin make sure that you don t have a scenario open in STK If another scenario is open close it by highlighting the scenario s name in the Browser window then selecting Close from the Files menu When you first open STK a Startup Wizard appears Click Cancel in the Startup Wizard then click the Scenario icon to create a new scenario Name the scenario Tutor3 To review instructio
70. nd 4 a m yet the ground track remains visible In the Display Times window change the Display Status back to Always On then click OK Generating a Report The reporting feature in STK makes it easy to view and analyze data Let s generate a standard report for the ERS1 satellite A number of standard formats were shipped with STK for your convenience To create a report highlight ERS1 in the Browser window right mouse click then select Report from the menu that appears 3 8 Satellite Tool Kit Tutorial Intermediate Skills Report Active Constraints Attitude Civaternions Create B1950 Position Yelocity Beta Angle Classical Orbit Elements ECF Acceleration ECF LLR Position Style ECF Pasition Velocity Eclipse Times Properties Estimates Time Period Euler Angles Add J000 ECI Acceleration J2000 ECI Position Velocity LLA Position LOF Mean Elements Lifetime Remove Lighting Times METE Position Velocity Make Copy Attitude Quaternions Change Cancel Mew Yov re going to create a report that shows attitude quaternions for the ERS1 satellite Highlight the report style entitled Attitude Quaternions in the Styles list and click Create to view the data Once you choose a report the report style name appears in the text box at the bottom of the window A window displaying ERS1 attitude quaternions appears ag Use the scroll bars on the right and bottom of the window to view additi
71. ns for setting Units please refer to Setting the Tutorial Environment in Chapter 2 Before beginning this exercise make sure the scenario s Units are set to UTC Gregorian Nautical Miles and Seconds Then make sure that the scenario s Start Time is set to 1 Nov 1997 00 00 00 00 and Stop Time is set to 2 Nov 1997 00 00 00 00 Facility and Target Constraints Now let s add a few of the facilities created in Chapter 2 of this tutorial Select Insert from the Files menu then make sure you re in the tutorial subdirectory and change the File type to Facility Insert the Baikonur Perth and Santiago facilities Now use these same procedures to insert the ERS satellite Open the Graphics Properties window for the satellite and make sure that the Display Time is set to Always On Now let s add a few of the facilities created in Chapter 2 of this tutorial Select Insert from the Files menu then make sure you re in the tutorial subdirectory and change the File type to Facility Insert the Baikonur Perth and Santiago facilities Now use these same procedures to insert the ERS satellite Satellite Tool Kit Tutorial 5 3 Advanced Skills Gl 4 ajalna ol 2 5 2 SSS ee ih See GF ae Si W A j A Viv Ne nN NA ee ee a _ oo RLT To begin this exercise we need to magnify the area around the Santiago facility in the Map window so that the constraints we impose are clearly visible
72. o two sensors must be attached to ERS1 a horizon sensor and an ERS1 downlink antenna 2 40 Satellite Tool Kit Tutorial In the Browser window highlight ERS1 click the 2 Sensor icon and name the new sensor Horizon The Browser window is updated to include the new sensor as a subclass of the ERS1 satellite Now open the Basic Properties window for the Horizon sensor We need to define the sensor and its targeting properties Horizon Basic Properties a p Definition Pointing Resolution Description Sensor Type Conical Clock Angles Inner 0 000 deg Minimum 0 000 deg Outer 90 000 deg Maximum 360 000 deg Apply Cancel Help In the Definition tab make sure the Sensor Type is set to Conical Leave the default Halfangle and Clock Angle values and select the Pointing tab The Horizon sensor has been defined to give a full field of view for the satellite This represents everything on the Earth that can be seen from the position of the spacecraft Satellite Tool Kit Tutorial 2 41 Horizon Basic Properties ail Definition Pointing Resolution Description Pointing Type Fixed Orientation Method Az El Azimuth 0 0000 deg Elevation 90 0000 deg About Boresight Rotate 4 OK Apply Cancel Help We want to point the sensor straight down relative to the ERS1 satellite To do this verify that the Pointing Type is set to Fixed and Elevation i
73. oftware without prior written authorization from Groupe Bull Agreed to this day of 19 By Title Satellite Tool Kit Software License Agreement STK TUTORIAL TABLE OF CONTENTS AKTORA cezeasecceseectaresher acetic a I FNDOUT TIS TUONA cerra n a E A T A 1 1 CHADE COMENG arni aa ee renee Roe Te Re eRe Rt re ee 1 2 Sr ASSIS O EOS iS E err SNA S 1 2 Conventions Used in This Manual ssi SacnscaoamncetinkacngtdakeaueesaSncaccacouikwos ledacnotdanas 1 4 AKF SONA F eaU ES ure e a e i e a andes dae 1 5 IONAIRE C OANA S a aa a be eeceiele 1 6 Attitude Simulation amp Targeting chad easctcrceioet oat aa icant sage actehd sateen seeeEendea Sanu cabanas 1 6 Sensor Definition and CONST AINIS ta cedhaatdtlaiatae Medneiaad ada aalhentaldhs 1 6 PTO NIII Sori ae ast each asta hahha ttl ates ict nate tak tallest ashes ach tacts 1 7 Data VvedaizAio isee a 1 7 BAIERIS AE n EE EE EE A E E E E E rere 1 7 High Precision Orbit Propagator HHPOP ssessssessssssessssssssssssssssssssssssssssssnn 1 8 LONG Emt Omt Predictor LOF ssir er e a lt 1 9 Krenna EA EE E E E E E E E A E ET 1 10 eer eee te rene ee ere renee eat epee E R 1 11 High Resolution Maps seeeeeeeeeeeeeeeeeeeseseesssesssssssssssesssssrsesseeresessssresesssssen 1 11 R R R E Satellite Tool Kit Tutorial i Table of Contents USO CTR es IS a caosey tesiecescta eateries E a GOING SUA EG et ocr iyo a A dado ta lanai e ed eee cleo yliel tied ee hse 2 2 SEAM Weta A A annie
74. ols the placement of the facility on the map Baikonur Basic Properties Position AzEIMask Atmosphere Description Position Type Geodetic 4 l Latitude 46 deg Longitude 55 0 deg I Local Time offset from GMT 2 808 Ar Altitude 0 0000000 nm _ Use terrain information OK Apply Cancel Help For the purposes of this tutorial set the options in the Position tab as follows Make sure the Local Time Offset from GMT and Use Terrain Information options are OFF Table 2 3 Baikonur position settings Field Setting Position Type Geodetic Latitude 48 0 Longitude 55 0 Altitude 0 0 Satellite Tool Kit Tutorial 2 15 gt T You can also position a facility by opening the facility s Basic Properties moving the cursor g in the Map window to the desired location observing the cursor position values displayed Hint in the lower left hand corner of the Map window then clicking the left mouse button when the correct position is achieved If you re using the cursor to set the position you may want to Zoom In on a specific area to improve your placement accuracy Now click the Description tab Identifying the Facility for Future Reference Use the Description tab to provide a brief and or detailed description of the facility for future reference Baikonur Basic Properties a jO Position AzEIMask Atmosphere Description Short Description Launch Site Long Description Russian la
75. on deg Range km 1 Nov 1997 00 00 00 00 113 269 13 046 148484045 059505 1 Nov 1997 00 01 00 00 113 986 11 613 148484193 152420 1 Nov 1997 00 02 00 00 114 613 10 141 148484346 864155 1 Nov 1997 00 03 00 00 115 150 8 636 148484505 491029 1 Nov 1997 00 04 00 00 115 597 7 103 148484668 310211 1 Nov 1997 00 05 00 00 115 954 5 548 148484834 582538 1 Nov 1997 00 06 00 00 Lif HEE 3 975 148485003 555373 1 Nov 1997 00 07 00 00 116 401 2 389 148485174 465612 1 Nov 1997 00 08 00 00 116 490 0 796 148485346 542542 1 Nov 1997 00 09 00 00 116 490 0 799 148485519 010918 1 Nov 1997 00 10 00 00 116 401 2 392 148485691 093965 1 Nov 1997 00 11 00 00 116 223 3 978 148485862 016402 1 Nov 1997 00 12 00 00 115 956 5 551 148486031 007458 1 Nov 1997 00 13 00 00 115 599 7 107 148486197 303879 1 Nov 1997 00 14 00 00 115 152 8 640 148486360 152896 1 Nov 1997 00 15 00 00 114 616 10 145 148486518 815159 1 Nov 1997 00 16 00 00 113 990 11 617 148486672 567614 a Let s print the report Select Print from the Files menu The report prints to the printer specified in the Print Setup Reports option from the STK Browser window Files menu To close this window select Close from the Files menu Viewing Data in Graph Format Let s see this same data in graph format so that you can compare and analyze various data elements more easily In the Browser window highlight the ERS1 satellite then select Graph from the Tools menu Sate
76. on Type Geodetic 4 Latitude 74 91 deg Longitude 74 5 deg I Local Time offset from GMT 288 fr Altitude 0 0000000 nm J Use terrain information OK Apply Cancel Help We need to set latitude longitude and altitude values for the newly created target In the Description tab we ll enter a short description For the purposes of this tutorial set Position and Description fields according to Table 2 6 below set the Position Type to Geodetic Table 2 6 Settings for the Iceberg target When you finish click OK To better see the target in the Map window open its Graphics Properties window and change the Marker Style to the target icon Click OK 2 22 Satellite Tool Kit Tutorial The Map window is updated to include the new target Creating Ships amp Satellites Next we ll create and define a ship and a number of satellites Creating a Ship Let s begin by adding a ship to the Tutorial40 scenario Click the Ship icon and change the new object s name to Cruise Press to apply the new name The Browser window 1s updated to include the new ship Open the Basic Properties window for the ship Properties menu Basic E Cruise Basic Properties Route Attitude Atmosphere Description Start Time 1 Nov 1997 00 00 00 00 Step Size 897 hy Stop Time 6 Noy P27 Trig tang Propagator Great rc Latitude Longitude Altitude Rate Turn Radius IT Update Map Graphics
77. onal data You i can also click and drag the corner of the window to enlarge the size so that more data i displays Hint O Satellite Tool Kit Tutorial 3 9 Intermediate Skills Report ERS Attitude Quaternions Files Edit 1 Jul 1997 17 46 15 Satellite ERS1 Attitude Quaternions 686327 170161 633662 313803 706376 178537 612376 06845 a PAm ILA 156836 590532 oase 744310 195062 560148 291823 T62153 203207 545243 aoa tod T79220 211272 521836 aioe 795491 219250 497944 ebb 750 810946 2ATla9 473586 257851 925576 234931 448783 240650 839357 242619 425555 239206 52AT 250197 397916 gagi 864525 257655 371893 ALIIE 075402 264963 345504 209623 505 744 2TalT 318770 199415 895099 EHIE 291714 189067 903538 206TA 264356 178599 911053 ade tba 236719 168033 917640 299262 208 AT J 157385 Pees 205552 180702 146677 928009 311619 Lagat Liauda To close this window select Close from the Files menu Now lets view the data for ERS1 s solar AER In the STK Report Tool window highlight the report style entitled Solar AER in the Styles list and click Create to view the data A window displaying ERS1 solar azimuth elevation and range data appears 3 10 Satellite Tool Kit Tutorial Intermediate Skills Help 1 Jul 1997 17 47 15 2 Satellite ERS1 ECIVVLH Solar AER Time UTCG Azimuth deg Elevati
78. ou finish click OK Display Times for Satellites Sometimes it may be important to see an object in the Map window for certain periods of time yet at other times the display of that object may be a distraction from other analysis efforts You can control the display of facilities targets satellites and other vehicles in the Map window Open the Graphics Properties window tor the ERS1 satellite and select the Display Times tab ERS Graphics Properties af attributes Pass Display Times Contours Display Status Use Intervals 4 Start Stop 1 Nov 1997 00 00 00 00 1 Nov 1997 01 00 00 00 Remove Add Change 1 Nov 1997 02 00 00 00 1 Nov 1997 03 00 00 00 1 Nov 1997 02 00 00 00 1 Nov 1997 03 00 00 00 Deconflict None wf OK Apply Cancel Help Change the Display Status from Always On to Use Intervals then enter 1 Nov 1997 00 00 00 00 in the first text box below the Interval Table and 1 Nov Satellite Tool Kit Tutorial 3 7 Intermediate Skills 1997 01 00 00 00 in the second text box Click Add Now enter 1 Nov 1997 02 00 00 00 and 1 Nov 1997 03 00 00 00 and click Add Click Apply Now click the El Animate Forward button in the Map window tool bar to see the changes in action Let the animation run for the full four hour period remember animation time is much faster than real time Notice that the ERS1 satellite icon and text label disappear between the hours of 1 and 2 a m and 3 a
79. p Highlight the Tutor3 scenario in the Browser window and select Remove Accesses from the Tools menu Now open the Graphics Properties window for the Uplink sensor click the Projection tab and change the Step Count to 0 then click OK The Map window no longer displays access graphics Generating a Walker Constellation A Walker constellation consists of a group of satellites t that are circular in orbits and have the same period and inclination The pattern of the constellation consists of evenly spaced satellites s in each of the orbital planes p specified so that t sp STK makes it easy to generate a Walker constellation We ll begin this exercise by creating a new scenario In the Browser window highlight the Tutor3 scenario and select Close from the Files menu Now click the icon to create an new scenario Change the default name of Scenario to the new name Tutor4 and press Enter Highlight Tutor4 in the Browser window Now open the Basic Properties window tor the Tutor4 scenario Make sure the scenario s Time Period tabs are set to 1 Nov 1997 00 00 00 00 for Start Time and 1 Nov 1997 04 00 00 00 for Stop Time Now create a new satellite named Walker and open its Basic Properties window 5 16 Satellite Tool Kit User s Manual Advanced Skills In the Orbit tab of the Basic Properties window Change the Semimajor Axis field to Period In the Period field enter 7200 seconds Change the Inclination to
80. p Projection Now let s set parameters for map projection Map projection controls the way in which the three dimensional 3 D globe is presented in the Map window Earth View i Map Properties a if Attributes Details Projection Images Text Annotation Resolution Type Center Lon 0 000 deg Projection Equidistant Cylindrical 4 OK Apply Cancel Help For the purposes of this tutorial select the Equidistant Cylindrical Projection Type When you finish click the Text Annotation tab 2 12 Satellite Tool Kit Tutorial Annotating Text You can also annotate the Map display in the Map window at a specitied latitude and longitude and or at a specific X Y coordinate pi m To move from field to field press Tab s 4 lt zi To overwrite a displayed value double click in the field you wish to modify Hint Earth View Map Properties a if Attributes Details Projection Images Text Annotation Resolution Lon Y Coordinate Edit Mode 60000 X 4 4 Add New Item w Change Current Item F Insert Item Delete Item Text My Tutorial Color RoyalBlue ai Position Kor 160 000 60 000 OK Apply Cancel Help Let s add new text to the Map window In the Text box type My Tutorial Now select the X Y Position option click in the first text box to the right of the Position field and enter 160 0 as the X coordinate In the
81. pand your skills so that you can analyze satellite systems You ll generate orbits review pass and ephemeris data and calculate accesses and AER data In addition youll learn to display sensor swaths animate scenarios change map projections generate reports and graphs for analysis purposes and print maps 6 Task To propagate and analyze vehicle orbits 6 Estimated completion time 1 hour oo S Satellite Tool Kit Tutorial 1 3 STK Tutorial Chapter 5 Advanced Skills The goal of Chapter 5 is to learn to constrain objects including sensors and to calculate accesses with constraints of varying degrees of complexity You ll also learn to set lighting conditions work with sensor swaths generate a Walker constellation and customize report formats Task To define and display constraints lighting conditions and sensor swaths Estimated completion time 30 minutes Conventions Used in This Manual Certain typographic and formatting conventions have been followed in this user s manual to help you quickly and visually understand various kinds of information Keyboard keys are displayed as graphical representations of the keys For instance represents the Enter key on a conventional keyboard User commands that must be typed are shown in a typewriter font For example tar xvf dev rst0 is one of the commands used when installing the STK product Mouse conventions such as click double click and
82. problem These are then automatically processed sequentially in the background storing the results in data files for later evaluation Lastly databases of facilities cities and stars are provided oS TC Satellite Tool Kit Tutorial 1 7 PRO HPOP STK Tutorial High Precision Orbit Propagator HPOP A state of the art orbit generator that can generate orbits for a wide variety of Earth satellites It can handle circular elliptical parabolic and hyperbolic orbits at distances ranging from the surtace of the Earth to the orbit of the Moon and beyond The HPOP includes modern high fidelity models for all of the major perturbations affecting an Earth satellite Joint Gravity Model JGM 2 an advanced 70x70 spherical harmonic expansion offering the highest accuracy currently available in an unclassified Earth potential model Lunar solar point mass gravitational effects using the U S Naval Observatory Compressed Ephemeris to predict the positions of the Sun and Moon This ephemeris is accurate to within 0 03 arc second Atmospheric drag using the Harris Priester atmosphere model modified to take into account the diurnal bulge and the variation in the Sun s extreme ultraviolet flux to compute the atmosphere density The drag model assumes single collision specular reflection which is appropriate for most satellites Departures from this can be modeled by changing the area to mass ratio of the satellite
83. r and the planet Jupiter Open the Access window for Sensor select Jupiter in the Associated Objects list and click Access in the Reports field to view access times Close the Access Report window In the Access window click the Remove Access button then click OK Now we re ready for our next exercise Satellite Swath As a user you may need to create a swath along a satellite s ground track to display a coverage area for a satellite Satellite Tool Kit Tutorial 4 5 More Intermediate SKills Creating the Satellite Swath To create a satellite swath highlight Hubble in the Browser window right mouse click and select Swath in the menu that appears Change the Ground Elevation to 35 00 and turn the Filled Limits option ON Click Apply The Map window displays the swath with a cross track at each of the ephemeris points determined by the Step Size of the propagated ephemeris asaaju ajoj vjje eja _ My Tutorial 46 Satellite Tool Kit Tutorial More Intermediate SKills Now select No Graphics in the Swath window and click OK Using the Long term Orbit Predictor Next we re going to use the Long term Orbit Predictor LOP to see how much a satellite s orbit changes over a period of two years In the Browser window click the satellite icon When the Orbit Wizard appears click Cancel Name the new satellite LOPSat Now open the satellite s Basic Properties window LOPSa
84. rbital parameters These orbital parameters are used for training purposes only and should not be used to launch actual satellites Now we need to set the parameters for our new satellite Open the Basic Properties window tor the ERS1 satellite Any parameter with more than one option displays a down pointing arrow 2 28 Satellite Tool Kit Tutorial Enter the orbital parameters for ERS1 found in Table 2 8 Use the right mouse button and the down pointing arrow I to change the default RAAN Right Ascension of the Ascending Node option to Lon Ascn Node Longitude of Ascending Node before entering the value listed in the table Table 2 8 Orbital elements for ERS1 Orbital Element Propagator Start Time Stop Time Step Size Orbit Epoch Coordinate Type Coordinate System Semimajor Axis Satellite Tool Kit Tutorial Setting J4 Perturbation 1 Nov 1997 00 00 00 00 1 Nov 1997 04 00 00 00 60 00 1 Nov 1997 00 00 00 00 Classical J2000 3867 7846 2 29 Orbital Element Setting Eccentricity 0 0 Inclination 98 50 Argument of Perigee 0 0 Lon Ascn Node 99 38 True Anomaly 0 0 When you finish click OK The Map window is updated to include the ground track for the requested orbit fiutorial40 Earth View 4 a 4 1 gt een Lat 78 103 Lon 136 552 Time Step 0 Time 1 Nov 1997 00 00 00 00 Paused You can change pass characteristics to see the effect on the graphics
85. s Inc Analytical Graphics provides the program and manual the Software and licenses its use to you You assume responsibility for the selection of the Software to achieve your intended results and for installation use and results obtained from the Software 1 LICENSE 1 1 You may a use this Software only on one single computer at y y 5 P any one time a computer being hereby defined as one central processing unit a single display and associated peripheral equipment Satellite Tool Kit Software License Agreement Software License Agreement all at one location and b make one 1 copy of the Software in any machine in any readable form for backup purposes in support of your own use of the Software on a single computer 1 2 You must reproduce and include the copyright and other proprietary notices of Analytical Graphics on any copy of all or any portion of the Software and all such copies shall be subject to all the terms and conditions of the Agreement 1 3 YOU MAY NOT USE COPY MODIFY OR TRANSFER THE SOFTWARE OR ANY COPY MODIFICATION OR MERGED PORTION THEREOF IN WHOLE OR IN PART EXCEPT AS EXPRESSLY PROVIDED IN THE AGREEMENT 2 LIMITATION AND WARRANTIES 2 1 THE SOFTWARE IS PROVIDED AS IS WITHOUT WARRANTY OF ANY KIND EITHER EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE YOU ASSUME THE ENTIRE RISK AS TO THE QUALITY A
86. s capabilities you may be unaware of other interesting time saving features If your initial use of STK requires only simple modeling you ll find STK to be a straightforward tool for accomplishing your work As your needs become more refined you can learn to use STK s more sophisticated resources to assist with your most complex demanding aerospace analysis tasks Satellite Tool Kit Tutorial 1 1 STK Tutorial This introduction presents a high level big picture of STK It is intended to help you develop a context in which to place the fine details of STK as you begin to work with the program Use the scenarios shipped with STK and the tutorial that follows this introduction to become familiar with the basic structure of STK as well as its functions and features This tutorial assumes that you re familiar with the operating platform and are used to maneuvering and mousing techniques Chapter Contents POO COIS TONA sean scines cod heed rasa nd ee EEE GB fo ONES aa E 2 STK Tutorial EEVEls OF EXPOSE x seins iee e eeo 2 Conventions Used m This Mantal essrs enea 4 STR PROTeS SIO Melle CAUUES egu E 5 ANNET ANANS E ease Sieicciea et aaitect satires cect ace Seta elation ahceuineaia tace See eee 6 High Precision Orbit Propagator Fir OP cessiecacectectit attra cidateasiecnaiecn ue 8 Long term Orbit Predictor LOP iccssccetnceudsucdt atanedt ta atalesansebaraud anak tasetedt cae 9 GUNI oueeeren pee ree tee terre
87. s often as you like The ERS1 satellite was originally defined with a Semimajor Axis of 3867 7846 nm To display the Apogee Altitude value click the down pointing arrow yj to the right of the Semimajor Axis field with the right mouse button and highlight Apogee Altitude in the list that appears Values for both Apogee and Perigee Altitudes are displayed 3 4 Satellite Tool Kit Tutorial Intermediate Skills 24 Hours of Ephemeris To generate 24 hours of ephemeris data change the Stop Time from 1 Nov 1997 04 00 00 00to2 Nov 1997 00 00 00 00 and click Apply This calculation may take a few seconds To speed the process you may want to consider 4 changing to a larger Step Size Note The Map window now displays 24 hours of ERS1 ephemeris Satellite Tool Kit Tutorial 3 5 Intermediate Skills E eee aes ee Full Week of Ephemeris If you wish to display one week of ephemeris data change the Stop Time to 8 Nov 1997 00 00 00 00 and click Apply ajajajaj ajeje ASE we WOK e 4 SORAA ROK os ie ag Ons ef K een ee Ht me ik ty ae Ay i Hy ve ge CNG i a WN en iy AN Ny Vi LAN oo os ae iG TA a i RE EN y Nr Ai iy i iy ay vet i i iW ih Wie V eee rT Lat 706 Lon 174080 ime 3 6 Satellite Tool Kit Tutorial Intermediate Skills Return to a 24 hour duration for ERS1 by setting the Stop Time to 2 Nov 1997 00 00 00 00 and the Step Size to 60 00 seconds When y
88. s set to 90 0 When you finish click OK The Map window doesn t immediately display sensor graphics You must animate the scenario to see sensor data Animating the Scenario First let s clean up Shuttle graphics so that the sensor can be easily seen in the Map window Open the Graphics Properties tor the Shuttle satellite and select the Contours tab Now turn OFF the Show Elevation Angle Contours options and click OK Animation is controlled from the tool bar in the Map window shown below Click the Reset m button then click Animate Forward gt to begin the animation 2 42 Satellite Tool Kit Tutorial You can see the Horizon sensor as the field of view for the ERS1 satellite Lat 51 724 Lon 176 446 Time Step 60 Time 1 Nov 1997 00 00 01 00 Paused Stop the animation by using Reset or Pause m Now add the Downlink sensor to the ERS1 satellite using the procedures introduced above To set the properties for the Downlink sensor open its Basic Properties window Satellite Tool Kit Tutorial 2 43 In the Definition tab set the Sensor Type to HalfPower the Freq to 0 85 GHz and the dish Diameter to 1 0 meter When you finish select the Pointing tab 2 44 Satellite Tool Kit Tutorial We want this sensor to point at our ground stations To do so change the Pointing Type to Targeted and the Boresight Type to Tracking Now select the PRO Baikonur facility in the Available Targets
89. se data or profits whether in an action of Satellite Tool Kit Software License Agreement Software License Agreement contract negligence or other tortious action arising out of or in connection with the use or performance of this software 11 XPM COPYRIGHT BY Copyright 1989 95 GROUPE BULL Permission is hereby granted free of charge to any person obtaining a copy of this software and associated documentation files the Software to deal in the Software without restriction including without limitation the rights to use copy modify merge publish distribute sublicense and or sell copies of the Software and to permit persons to whom the Software is furnished to do so subject to the following conditions The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software The Software is provided as is without warranty of any kind express or implied including but not limited to the warranties of merchantability fitness for a particular purpose and noninfringement In no event shall Groupe Bull be liable for any claim damages or other liability whether in an action of contract tort or otherwise arising from out of or in connection with the software or the use or other dealings in the software Except as contained in this notice the name of Groupe Bull shall not be used in advertising or otherwise to promote the sale use or other dealings in this S
90. second text box enter 60 0 as the Y coordinate Change the display color to Royal Blue When everything is set click the Insert Item button When you finish click OK A Map window similar to the one shown here appears The map is updated to reflect the changes you made to the application and scenario parameters as well as the display of map graphics Satellite Tool Kit Tutorial 2 13 Tutorial40 Earth View 1 a Creating Facilities Now we re going to populate the scenario with various objects Let s start with facilities such as ground stations launch sites and tracking stations As the cursor moves over an icon in the Object Menu the icon s purpose is annotated at the bottom of the Browser window Click the Facility icon in the lower portion of the Browser window Change the facility s name to Baikonur by double clicking on the default name and typing the new name in the highlighted text Press to apply the new name The Browser window is updated to include the new facility and the Map window displays the facility at the default 0 latitude 0 longitude position Now select Basic from the Properties menu 2 14 Satellite Tool Kit Tutorial pag You can also use the right mouse button to display menu that includes Properties and d 4 Tools for any object h Hint Setting the Facility s Position The first tab in the Basic Properties window is the Position tab Position contr
91. setting only affects satellites and has no effect on nonorbiting vehicles such as ground vehicles aircraft launch vehicles etc To propagate all satellites in the scenario open the Basic Properties window for the Tutorial40 scenario and click the Time Period tab 3 16 Satellite Tool Kit Tutorial Intermediate Skills Set the Start Time at 1 Nov 1997 00 00 00 00 and the Stop Time to 2 Nov 1997 00 00 00 00 Click OK As you can see from the ground tracks in the Map window following all the satellites now have ephemeris for the 24 hour period specitied l i mE i 4 Satellite Tool Kit Tutorial Intermediate Skills Calculating Access Now that we have 24 hours of ephemeris propagated for all satellites we want to determine the access between ERS1 and the Shuttle to a facility a target and between the two satellites Access from a Facility or Target to Satellite In the Browser window highlight the Santiago facility and select Access from the Tools menu Access Santiago Associated Objects Graphics IT Show Line JT Animate Highlight EF SearchArea p Baikonur Perth I Static Highlight amp p Wallops Reports Graphs Access Access AER AER Compute Custom Custom Remove Access Pamore Dynamic Strip Chart Cancel Help In the Associated Objects list highlight ERS1 then make sure that the Show Line
92. t Basic Properties a i0 Ornit Attitude Pass Break Mass Description Start Time 1 Nov 1997 00 00 00 00 Step Size 1 000 day Stop Time 1 Noy 1999 00 00 00 00 Propagator LOP E Orbit Epoch 1 Nov 1997 00 00 00 00 Semimajor Axis yi 22766 8218462 nm Coord Epoch f Jen 2008 13 Se86 Sz Eccentricity yi 0 00100000 Inclination 26 5000 de Coord Type Classical i Argument of Perigee 360 0000 deg Coord System J2000 a Lon Ascn Node yi 260 0 deg Prop Specific Force Models True Anomaly F 300 35 deg OK apply Cancel Help In the Orbit tab set the following parameters Orbital Element Setting Propagator LOP Start Time 1 Nov 1997 00 00 00 00 Stop Time 1 Nov 1999 00 00 00 00 Satellite Tool Kit Tutorial 4 7 More Intermediate SKills Orbital Element Step Size Orbit Epoch Coordinate Type Coordinate System Apogee Altitude Perigee Altitude Inclination Argument of Perigee Lon Ascn Node True Anomaly Setting 1 day 1 Nov 1997 00 00 00 00 Classical J2000 35828 181213 35743 852905 28 5 360 0 260 0 300 35 When you finish click the Force Models button on the Orbit tab LOP Force Modei LOPSat m Earth Gravity Maximum Degree 6 Maximum Order 6 Third Body Gravity E Use Solar Gravity T Use Lunar Gravity Solar Radiation Pressure I Use Cp 1 500000 Atmosphere Height 90 000 km Drag Cross Sectional Area 8 060 a lt
93. t of Defense Users Use duplication or disclosure by the Government is subject to restrictions set forth in subparagraph c 1 i1 of the Rights in Technical Data and Computer Software clause at DFARS 252 277 7013 Analytical Graphics Incorporated 660 American Avenue King of Prussia PA 19406 Restricted Rights Notice US Government Users excluding DoD Notwithstanding any other lease or license agreement that may pertain to or accompany the delivery of this computer software the rights of the Government regarding its use reproduction and disclosure are set forth in the Commercial Computer Software Restricted Rights clause at FAR 52 227 19 c 2 Software License Agreement ANALYTICAL GRAPHICS INC AGI IS WILLING TO LICENSE SATELLITE TOOL KIT STK TO YOU ONLY UPON THE CONDITION THAT YOU ACCEPT ALL OF THE TERMS IN THIS LICENSING AGREEMENT BEFORE YOU OPEN THE ACCOMPANYING SOFTWARE MEDIA READ THE TERMS AND CONDITIONS OF THIS LICENSE AGREEMENT CAREFULLY BY OPENING THE ACCOMPANYING SOFTWARE MEDIA YOU ARE CONSENTING TO BE BOUND BY AND ARE BECOMING A PARTY TO THIS LICENSE AGREEMENT IF YOU DO NOT AGREE WITH THE TERMS AND CONDITIONS OF THIS AGREEMENT AGI IS UNWILLING TO LICENSE STK TO YOU IN WHICH EVENT YOU SHOULD RETURN THE UNOPENED SOFTWARE MEDIA AS WELL AS THE DOCUMENTATION WITHIN THIRTY 30 DAYS OF PURCHASE AND YOUR LICENSE PRICE WILL BE REFUNDED ANALYTICAL GRAPHICS INC SOFTWARE LICENSE AGREEMENT Analytical Graphic
94. te the scenario to display time dependent information in the Map window For previous STK users this section serves as a refresher for basic STK operations and also highlights a number of new features to help you use STK more effectively Chapter Contents Getinge enere een Tr rent E et reer rere 2 2 Satellite Tool Kit Tutorial 2 1 DS E E E eatin ie eit iat ore AE EA AE TE A E 2 3 Creating the Tutorial4O SCCMANIOY gcc inb2e tease hiciead eet enatebacacnb lo bedava biemeadterhewaties 2 3 Seting the Tutoral4o ENVIFOMMEME eei a dhl accienln cient a lan 2 5 SEMNIG FO PIECANO MPI OD CMICS sapa eee aoe eee 2 6 Setting Scenario amp Map Properties sos wececeriacad i iacaus erect debe aecacetveseniesade 2 Creating ACIS sisii aiaiai eia ieee Acad aiei aiei aikin 2 14 seting the Facility s POSON eis aivan aane eden E EE aN 2 15 Identifying the Facility for Future Reference sssesesesseenrirrrirnnnneeenn 2 16 Adding More FACIES sissien trernen irni eriei aeii 2 17 TEAMING Tige eues Secencalaes ee eek ah letatn Secen ca lars 2 2 Setting Ine Targets Postion amp DesCiPUO Nh sreca 2 22 creating SIDS e Selles ssie a ee s 2 23 Ceng a NPer A re eae Se ere 2 23 Creating stees eee a aes et ds son oes 2 26 PARGO SWETE ae epee reenter pre re rr ere are yr ree 2 28 samping Map Projeccion Senone naa a a a ian 2 36 Adang an WEA Targat seie a e a E 2 38 FCG o BOS AE N a eeetueaiaaldca fou 2 40 ANNAGA SCENI O i a E eter tient 2 42
95. the Subsolar Point ia Hint Satellite Tool Kit Tutorial 5 21 Advanced Skills A TT Lat 76 222 Lon 165 778 Time Step 100 00 sec Time 1 Nov 1997 00 00 00 00 Paused Now let s view Sun lighting data in report format Open the STK Report Tool window for the Molniya satellite Report Active Constraints Attitude Quaternions Create B1950 Position Velocity Time Period Properties Add J2000 ECI Acceleration J2000 ECI Position Velocity TE LLA Position ow LOP Mean Elements Lifetime Remove Lighting Times METE Position Velocity Make Copy In the STK Report Tool window highlight Lighting Times in the Styles list and click the Create button A Lighting Report window appears 5 22 Satellite Tool Kit User s Manual Advanced Skills Close both Report windows Lighting During Animation In the Browser window highlight Molniya and select Lighting from the Tools menu Te Satellite Tool Kit Tutorial 5 23 Advanced Skills Set the Sunlighting properties as shown in the table below Make sure the options are turned ON Table 5 2 Sunlighting properties settings Field Setting Sunlight Set the Sunlight Color to Yellow the Line Marker Style to Dashed and the Line Width to 4 Umbra Set the Umbra Color to Cyan the Line Marker Style to Solid and the Line Width to 2 Show Turn this feature ON Sunlight Penumbra Line at Satellite Altitude When you finish
96. the default values for the Clock Angles Now select the Pointing tab In the Pointing tab make sure that the Pointing Type is set to Fixed and that Elevation is set to 90 0 Click OK Next open the sensor s Graphics Properties window and select the Projection tab In the Projection tab set the Maximum Altitude to 424 0 nm and the Step Count to 1 then click OK Now the 5 elevation ring around Wallops is defined and graphically displayed The Map window shown here is zoomed to more clearly display the FiveDegElev sensor around Wallops 2 46 Satellite Tool Kit Tutorial ajajajaj ajoe SOS Maas garite Sands pr to za Lat 67 260 Lon 19 132 Time 1 Nov 1997 00 00 01 00 Paused Now we need to save this sensor so that we can also use it for the WhiteSands facility To do this highlight the FiveDegElev sensor in the Browser window then select Save from the Files menu Now let s add that same sensor to the WhiteSands facility In the Browser window highlight WhiteSands then select Insert from the Files menu When the Insert window appears change the File Type to Sensor and select the FiveDegElev sn The Map window is updated to display the new sensor around WhiteSands ite Sands Lat 42 326 Lon 15 740 Time 1 Nov 1997 00 00 01 00 Paused Sh ttie Satellite Tool Kit Tutorial 2 47 Warning Cleaning Up If you wish to save the Cruise ship or the SearchArea you must do so
97. ting UMC SAtCIILS SVVAUN oisin an S A a 4 6 Using the Long term Orbit Predictor cs inncastitaaeny ada idbarecetdiveudecSaaernsdnied ates 4 FAT MPMAUPIG ASC CIAO a n S S 4 2 Sinise GING satelite Ata AS CS vise sscet T 4 13 Anmaing LNG SCC AMO erea ER R 4 15 Generating Combination REDOMS v cxicscalesssaadaatttgataestecauiccedlasasaideaeidiaiy 4 16 MaD ieLOJCCUONS praes heaters iadaune at E E O 4 17 MAD BAEKIFOUNES ponga E lee 4 21 SVOG ME SENAO araser aE E es EE AEA 4 22 Getting Started Before you begin make sure that you don t have a scenario open in STK If another scenario is open close it by highlighting the scenario s name in the Browser window then selecting Close from the Files menu The Map window appears when you create a scenario First let s make sure we re in sync with scenario units Highlight the scenario in the Browser right mouse click and select Basic in the menu that appears Click the Units tab Make sure the scenario s Distance Units are set to Kilometers Time Units are set to Seconds Date is set to Gregorian UTC and Small Distance Units are set to Meters 42 Satellite Tool Kit Tutorial eE oo all More Intermediate SKills Access from a Planet or Star First we re going to look at access between a satellite and a planet For this exercise we need to add the Hubble space telescope and the planet Jupiter to the Tutor2 scenario To add the planet Jupiter to the scenario click t
98. u can see the changes taking place over time Make sure ERS1 is still highlighted in the Browser window then select Dynamic Display from the Tools menu Eclipse Times en Estimates Open Euler Angles J2000 ECI Acceleration J2000 ECI Position Velocity LLA Position LOP Mean Elements Style Lifetime Lighting Times Properties METE Position Velocity MOD Position Velocity Pass Data Add Residuals NEN Sun Yector ECF Sun Vector J2000 Remove Sun Yector TOD TLE Make Copy Solar AER Change Cancel In the STK Dynamic Display Tool window highlight the style entitled Solar AER in the Styles list and click Open No information displays because the scenario isn t animating To view data over time click the D Animate Forward button in the Map window tool bar ERS1 solar azimuth elevation and range data appears at specified time intervals 3 14 Satellite Tool Kit Tutorial Intermediate Skills Time UTCG 1 Nov 1997 01 00 01 00 Azimuth deg 63 551 Elevation deg 1 662 Range km 146483606 662009 ti 4 E S A If the data is changing too quickly too read use the K Decrease Animation Time Step gi button in the Map window tool bar to slow the animation time Hint To exit the Dynamic Display select Close from the Files menu then click Cancel in the STK Dynamic Display Tool window Dynamic Strip Charts We can also see information dynamically in graph format usin
99. unch site located in Siberia OK apply Cancel Help If you have a Comm license the facility s Basic Properties window also contains an Atmosphere tab To learn more about the Comm module please consult the Comm User s Manual Note 2 16 Satellite Tool Kit Tutorial For the purposes of this tutorial enter the following text in the Description tab Table 24 Descriptions Field Setting Short Description Launch Site Long Description Russian launch site located in Siberia Click OK Adding More Facilities Now that we ve added one facility to the scenario it will be an easy task to add tour more new facilities to the Tutorial40 scenario Use the procedures described above to add the facilities listed in Table 2 5 There is no need to provide a Long Description for any of the facilities Table 2 5 Settings for Perth and Wallops facilities Perth 31 0 116 0 Australian Tracking Station Wallops 37 8602 75 5095 0 0127878 NASA Launch Site Tracking Station When you finish defining each facility click OK We still need to add two more facilities to the scenario This time we ll use the Facility Database tool to easily add the facilities Satellite Tool Kit Tutorial 2 17 Adding Facilities Using the Facility PRo Database Advanced Analysis In the Browser highlight the Tutorial40 scenario and select Facility Database from the Tools menu Database stkFacility fd e Site Name Lat
100. und Image 4 2 Map Details _ 2 1 1 Map Projections 2 12 2 36 4 17 Azimuthal Equidistant 4 19 HammerAitofi _ 19 Mercator _ 4 17 Mille 4 18 Mollweide 4 18 Orthographic _ 4 19 Perspective _ 4 20 Sinusoidalt _ 4 18 Stereographic 19 Map Window Printing the Map 4 20 Tool Bar 4 15 5 22 5 26 Satellite Tool Kit Tutorial Nutation P Pass Data Pointing a Sensor2 42 2 45 4 4 5 13 Precession Printing Maps Properties Menu Constraints Property Windows Resizing the Window R Reports Access AER Lighting 3 20 3 21 4 5 Runge Kutta Fehlberg S Saving the Scenario 248 3 28 Scenarios Tutorial Scenarios Animating 2 42 Basic Properties Map Background _ Time Period Units Graphics Properties Map Attributes Map Detailss Map Projection Sun Lighting 3 1 8 4 20 2 6 2 5 3 8 5 10 5 26 5 23 1 9 4 22 4 12 4 2 3 17 2 10 2 10 2 11 2 12 5 22 Index New 24 Prope rties 2 7 Save 248 3 28 4 22 stkDemo WH 1 2 Tutor2 sc 5 17 Sensors 240 Basic Proeprties Definition _ 5 13 Pointing _ 5 13 Basic Properties Define 2 43 Po
101. using high accuracy small time step propagators that compute a satellite s position as it moves through its orbit LOP exploits a variation of parameters approach which integrates analytically derived equations of motion computing the average effects of perturbations over an orbit This approach allows large multi orbit time steps and typically improves computational speed by several hundred times while still offering high fidelity computation of orbit parameters Satellite Tool Kit Tutorial 1 9 PRO LOP PRO Lifetime STK Tutorial User inputs include an initial orbit and satellite mass area and drag coefficient The program implements the 1976 standard atmosphere to compute the drag effects Additionally LOP considers the effects of the Earth s oblateness through J21 the resonant effects of tesseral harmonics solar and lunar gravity and solar radiation pressure when computing the orbital perturbations The module is based on algorithms provided by NASA s Jet Propulsion Laboratory Lifetime Lifetime estimates the amount of time a low Earth orbiting satellite can be expected to remain in orbit before the drag of the atmosphere causes reentry While the computational algorithms are similar to those implemented in the Long term Orbit Predictor there are some important differences First a much more accurate atmospheric model is implemented to compute the drag effects The gravitational model for the Earth how
102. w copy Semimajor Axis from that same folder to the y2 list When you finish click the Layout tab oS Satellite Tool Kit Tutorial More Intermediate SKills In this tab enter LOP Orbital Elements in the Title field then click OK Let s see what our graph looks like In the STK Graph Tool window click Create Satellite Tool Kit Tutorial 4 11 More Intermediate SKills Graph LOPSat LOP Orbital Elements Ej Files Edit Satellite LOPSat J2000 ECI Classical Orbit Elements 7 Jul 1997 13 34 17 Angle Distance 300 42167 42166 42165 42164 42163 42162 1 Nov 1997 00 00 00 00 1 Nov 1998 00 00 00 00 1 Nov 1999 00 00 00 00 Time UTCG Arg of Perigee deg semi major Axis km Clicked At x Y YZ B B Restore Nearest Point X Yz Animating a Scenario So far in this tutorial we ve worked mainly with static displays We re going to add a few facilities to the scenario then animate to see when the satellites have access to facilities First select Insert from the Files menu change the File Type to Facility and select Santiago f and Baikonur f in the tutorial subdirectory the directory in which the Tutorial40 scenario is saved 42 Satellite Tool Kit Tutorial More Intermediate SKills Using the City amp Satellite Databases Now highlight the Tutor2 scenario in the Browser window and select City Database from the Tools menu Database stkCityD

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