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From: Julia A. <jul...@go...> - 2024-10-10 14:24:42
|
---------- Forwarded message --------- From: Julia Astley <jul...@go...> Date: Thu, 10 Oct 2024 at 15:09 Subject: Using SPICE files in GMAT To: <gma...@li...> Hello, Apologies if this is not the appropriate usage for this email address, but I am in need of some guidance on using SPICE SPK, FK, CK and SCLK files in GMAT. I have created the above files using SPICE, and am able to read/use as expected using spiceypy, but encountering error: 'Utility Exception: Pointing data for object <sat name> not found on loaded CK/SCLK kernels' when I load them into a GMAT scenario. Can you please point me towards any general tutorials or troubleshooting documentation you may have on this topic? Thank you for taking the time to read this. Best wishes, -- Julia Astley (+44) 7882275520 -- Julia Astley (+44) 7882275520 |
From: Matthew S. <mat...@fi...> - 2024-09-18 19:16:20
|
Hello, We are implementing GMAT for navigation of our upcoming demo satellite mission. Would it be possible to get access to the already written TDM to GMD conversion tool prior to the R2024a release? Or perhaps even access to the test repo? Thanks, Matt [cid:72f60025-cf14-47a6-a49e-2f74f9ccef0e] Matthew Smith Flight Dynamics Engineer mat...@fi... | C: 936-404-9754 Firefly Aerospace, Inc. | www.fireflyspace.com<http://www.fireflyspace.com/> 5900 Highway 183A, Leander, TX 78641 Please respect the privacy of this message. It may contain information confidential to Firefly and the intended recipients. This message may also contain export-controlled information. If you have received the message in error, kindly notify the sender and permanently delete the message |
From: Robert H. <hic...@gm...> - 2024-09-04 17:51:00
|
I need some help installing GMAT. I tried it using a Mac and WIndows. On the MAC, after downloading the GMAT file in my users/application folder. I went to the GMAT R2022a/bin directoryand tried to run GmatConsole-R022a. I got a NOT Recognized Command message. IN Windows 11 there was no GMAT.exe application underGMAT RO2022a/bin. The Beta program would also crash. What am I doing wrong? --Robert Hickman |
From: Robert H. <hic...@gm...> - 2024-09-04 17:49:07
|
I need some help installing GMAT. I tried it using a Mac and WIndows. On the MAC, after downloading the GMAT file in my users/application folder. I went to the GMAT R2022a/bin directoryand tried to run GmatConsole-R022a. I got a NOT Recognized Command message. IN Windows 11 there was no GMAT.exe application underGMAT RO2022a/bin. The Beta program would also crash. What am I doing wrong? --Robert Hickman |
From: <dav...@dl...> - 2024-08-23 11:47:05
|
Dear GMAT team, For a project we try to use the Python GMAT API to create a simple Hohmann transfer and receive the coordinates and velocity vectors in 60 second time steps. We have used the example from the API user guide to propagate a simple orbit. However, we couldn't figure out how to create a mission sequence with burn maneuver and there are no examples in the user guide. We would really appreciate any example or direction that could help us. Thanks in advance. Best regards, David -------------------------- German Aerospace Center (DLR) Galileo Competence Center | Oberpfaffenhofen, Münchener Str. 20 | 82234 Weßling | Germany David Hiebl | Modeling & Simulation Engineer | GK-RBT Telephone +49 8153 28 1843 | dav...@dl...<mailto:dav...@dl...> www.DLR.de<http://www.dlr.de/> |
From: Alex L. <m2...@us...> - 2024-07-08 17:50:27
|
Good Afternoon, I am currently working at NRL under the NCST (Naval Center for Space Technology). Our group at the NCST is considering GMAT as a source of astrodynamics simulation and display tools for a project that is currently in the early stages. I have been asked to investigate and provide information and feedback on version R2022a. We are especially interested in the ability to use the Python API to incorporate GMAT's strengths into our purpose-built tools. My current conclusion with the Python API is that it is still heavily in development stages and is not capable of doing a lot of the logic and utilizations of the Differential Correctors that the GUI and GMAT scripting language can do. This especially seemed to be the case when I looked at the sample Python codes provided with my GMAT program, especially Ex_R2020a_FindTheMoon.py, which instead of using an Differential Correctors or GMAT-based logic tools, simply used multiple nested for loops with an if statement, which already took 5 minutes and 51 seconds to run for a problem which did not even have a graphical display implemented and was not particularly complex compared to some of the scripts I have done within even the YouTube tutorials of GMAT. I bring this up as a question for if I am wrong and if there is a way to implement the Differential Corrector and commands like Target and Vary within my Python code? When doing ShowClasses within the GMAT Python API, I can see that there are classes named Target and Vary, but I am yet to find a way to implement or use them, and cannot find any documentation provided in my download or online that guides me on to how to use these in Python. Are these classes just names right now and still in development for later versions, or is there a way to use them and their features within the API? If there is a way, would it be possible to be provided some documentation or assistance on how to utilize them? Thank you. Very Respectfully, A.J. Leyzerzon MIDN USN ReplyForward Very Respectfully, A.J. Leyzerzon MIDN USN |
From: Simone R. <s.r...@ku...> - 2024-06-11 10:54:49
|
I forrward this error message. SR ---------- Forwarded message --------- Da: Simone Ripandelli <s.r...@ku...> Date: lun 10 giu 2024 alle ore 15:48 Subject: Tutorial Text unavailable To: <gma...@li...> Good afternoon, using GMAT I found this error with a click on "Step by step Text Tutorials" 1. *Server:* gmat.sourceforge.net 2. *URL path:* /docs/R2022a/html/Tutorials.html 3. *Error notes:* NONE 4. *Error type:* 404 5. *Request method:* GET 6. *Request query string:* NONE 7. *Time:* 2024-06-10 13:42:01 UTC (1718026921) -- Simone Ripandelli, PhD Lead Engineer - Program Manager s.r...@ku... Cell (+39) 335 5777560 Kurs (kursorbital.com) <https://kursorbital.com/> |
From: Goeckner, N. A <goe...@ia...> - 2024-03-02 00:13:58
|
Hello, I am trying to use GMAT to simulate an interplanetary trajectory from LEO to Mars insertion using electric propulsion for future optimization. I would like to know more details on the polynomial used by GMAT for the electric thruster model. However, I cannot find any information concerning this in the User Guide or Mathematical Specifications document. Any information or resources you could point me to to help with this would be greatly appreciated. Thank you for your time! Nick Goeckner |
From: Cooley, D S. (GSFC-5950) <d.s...@na...> - 2024-03-01 00:16:42
|
Good evening, Thank you for your interest in GMAT! This is a known issue. See our news release from last year below: GMAT R2022a on Mac OS Sonoma GMAT R2022a was built for MacOS 12 (Monterey) and 13 (Ventura) based machines, and has been tested on those platforms. MacOS 14 (Sonoma) is showing run time issues for the GMAT GUI on Apple Silicon (M1, M2, M3) based machines. The GMAT Console application continues to run as expected on MacOS Sonoma for these machines. MacOS development is currently paused due to funding issues. We will address the Sonoma runtime issues when resources become available. Posted by [Steve Cooley] <https://sourceforge.net/u/dcooley/profile/> 2023-11-27 Thanks again for you interest in GMAT. Regards, Steve -----Original Message----- From: leonardo boscarato <leo...@gm...> Sent: Thursday, February 29, 2024 6:51 PM To: gma...@li... Subject: [EXTERNAL] [BULK] [Gmat-developers] Error starting Gmat software on Mac M1 CAUTION: This email originated from outside of NASA. Please take care when clicking links or opening attachments. Use the "Report Message" button to report suspicious messages to the NASA SOC. Once the software was installed on my Mac, I saved the folder in the applications folder (as written in the readme.txt file) but nothing. As soon as I start it it doesn't even give me an error, it crashes without even starting. I tried to move the folder to the user application folder but even there the application crash during the starting. If you have some advice to give me I would be happy, because I've tried them all but I don't know what to do anymore. I hope for your response. L _______________________________________________ GMAT-developers mailing list GMA...@li...<mailto:GMA...@li...> https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Fgmat-developers&data=05%7C02%7Cd.s.cooley%40nasa.gov%7Cae316942808a43065a4808dc39816679%7C7005d45845be48ae8140d43da96dd17b%7C0%7C0%7C638448475130324526%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=728aSAerM2WDv4u7RWet%2FjW7xZcg%2BZbAMrw0J2bV6F4%3D&reserved=0<https://lists.sourceforge.net/lists/listinfo/gmat-developers> |
From: leonardo b. <leo...@gm...> - 2024-02-29 23:51:36
|
Once the software was installed on my Mac, I saved the folder in the applications folder (as written in the readme.txt file) but nothing. As soon as I start it it doesn't even give me an error, it crashes without even starting. I tried to move the folder to the user application folder but even there the application crash during the starting. If you have some advice to give me I would be happy, because I've tried them all but I don't know what to do anymore. I hope for your response. L |
From: leonardo b. <leo...@gm...> - 2024-02-29 23:49:25
|
Once the software was installed on my Mac, I saved the folder in the applications folder (as written in the readme.txt file) but nothing. As soon as I start it it doesn't even give me an error, it crashes without even starting. I tried to move the folder to the user application folder but even there the application crash during the starting. If you have some advice to give me I would be happy, because I've tried them all but I don't know what to do anymore. I hope for your response. LB |
From: Dirgh B. <dir...@gm...> - 2024-02-24 09:14:27
|
Hello Sir/Ma'am, I'm Dirgh Bhatt, from India. I have been using GMAT for sometime now. I am currently working on a project that deals with Two-Line Element sets. I observed that GMAT gives output in frame other TEME reference frame (as used by TLE). I wanted to know how GMAT does the transformation from TEME reference frame to J2000. It would be great help if you could provide me with the algorithm that GMAT implies and any reference that might be helpful for my understanding. Thanks and Regards Dirgh Bhatt |
From: Prakhar T. <pra...@gm...> - 2024-02-23 08:16:16
|
Hi, I'm working on a project for which I'm using the GMAT 2022a version on my OS- Manjaro (arch-linux). I'm using the Python API for accessing the required classes and objects of GMAT. I could successfully create a spacecraft, add force models, and propagate it, but couldn't plot its ground track. I came across a module- GroundTrackPlot, which is apparently used for plotting the ground track of satellites, but I'm not able to decipher how to use it in Python. It's nowhere mentioned in the user documentation in the 2022a release. Also, I wanted to know how to perform visibility analysis using the API. I'd be extremely grateful if you could help me in this situation. Thanks in advance! : ) Warm regards, Prakhar Tomar SC20B040 B.Tech in Aerospace Engineering Indian Institute of Space Science and Technology Email: pra...@gm..., pra...@ug... |
From: Palmer, R. B <rpa...@ga...> - 2024-02-22 17:47:45
|
Hi devs, For a while now, most of the helpful info new users need to figure out GMAT is under broken links. Specifically, the Linode repository of sample missions is broken (likely since the Akamai takeover of Linode) and all gmatcentral.com links are broken (Cloudron host returning "Not Found"). >From this Confluence page, https://gmat.atlassian.net/wiki/spaces/GW/pages/380273279/For+Contributors, the only two links that are functional are self-referential to other Atlassian pages (Current Dev Dashboard & Writing User Documentation), and the Math Specs PDF. Please help! We really miss the example projects in the Mission Library and the forums. An outline of the forums is available on archive.org, but the content inside each post is usually not imaged. [cid:img001.png@01DA64CB.E159FA40] Best, Bec ________________________________________ Rebecca Palmer Graduate Research Assistant | Space Systems Design Lab rpa...@ga...<mailto:rpa...@ga...> | Phone: (423) 650-2783 |
From: <184...@qq...> - 2024-02-22 07:41:20
|
hello devs and guys, i have to report a qusetion.Does somebody know why? when i try to set a finiteburn to simulate the Centaur Upper Stage,it said its thrust is unphysical,it seems like in chemicalthrust,C1 can't greater than 11000N,but the Centaur Upper Stage 's thrust is 21200 N,i don't know why? could you guys help me? thanks! |
From: Mike V. <kmm...@gm...> - 2024-02-19 07:57:44
|
Dear all, I have been trying to load, initialize, and run a GMAT-script using the provided Python API: import gmat_py as gmat # the one in the *R2022a/bin/gmatpy/_py38/* folder gmat.LoadScript('/home/m07/Desktop/MSE/THESIS/RACCOON/Scripts/Optimization/test.script') gmat.Initialize() gmat.ShowObjects() gmat.RunScript() The script contains subscribers and event locators, such as: - OrbitView - OpenFramesInterface - ReportFile - GroundTrackPlot - XYPlot - ContactLocator For the subscribers, the only informative error description I get is: > *APIException: Subscriber Exception: > Subscriber::SetActualWrapperReference() "XYPlot1" failed to set reference > for object named "cubesat1.UTCModJulian." The wrapper is NULL.* > Notice the dot symbol at the "*cubesat1.UTCModJulian*", it doesn't exist in the script. Once I delete the related block of code in the GMAT-script, the following error is thrown for every other subscriber as well. The exception message is contained in the *R2022a/plugins/libEventLocator.so *shared library. Once I get rid of the subscriber section in the GMAT-script, I get the ContactLocator errors: > *APIException: Event Exception Thrown: Error setting observers on > ContactLocator Contact_Sat1_GS1. All observers must be either ground > stations or spacecraft. * In the GMAT-script, a contact locator refers to a spacecraft as an observed object (Target) and a ground station as an observer. When run via GMAT GUI, the script successfully finishes, all report files are generated, plots and 3-D visualization rendered alright. These issues prevent me from trying optimization Python codes in pair with GMAT. How could I solve this? Thank you in advance. Best regards, Mike |
From: Hornig, A. <And...@je...> - 2024-02-13 09:41:17
|
Hello GMAT Developers, is the GMATcentral.org domain still working? I was checking this pager[0] and when I clicked the link to GMATcentral it did not work. I know GMAT since I used it for my Master's[2] in 2012 and I still like and use it today. I was looking for the forum post that I remembered I did on that website. When I googled I was not able to find the forum at all and also on your wiki[1] I did not find the link to what I was looking for. I wanted to ask the community where I could find *.3ds files for cubesats that work with GMAT. I want to replace the standarf Aurora Satellite. If you can help me with pinpointing me to the new address of the old forum or another "forum" where I could ask these kind of things I would like to ask my question there. That would be much appreciated. Best regards, Andreas [0] https://opensource.gsfc.nasa.gov/projects/GMAT/index.php [1] https://gmat.atlassian.net/wiki/spaces/GW/overview [2a] https://www.researchgate.net/publication/271773608_TYCHO_Demonstrator_and_operational_satellite_mission_to_Earth-Moon-Libration_point_EML-4_for_communication_relay_provision_as_a_service [2b] https://ideas.esa.int/servlet/hype/IMT?documentTableId=45087169445294385&userAction=Browse&templateName=&documentId=e3f5e00bb992b91a4378e46176b02376 ----- Andreas HORNIG Jena-Optronik GmbH Otto-Eppenstein-Strasse 3 07745 Jena E-mail: and...@je...<mailto:and...@je...> http://www.jena-optronik.de CEO: Peter Kapell Sitz der Gesellschaft: Jena | Handelsregister: AG Jena HRB 201.869 |
From: <184...@qq...> - 2024-02-05 02:22:10
|
hello devs, i have to report a bug. when i try to set a finiteburn to simulate the Centaur Upper Stage,it said its thrust is unphysical,it seems like in chemicalthrust,C1 can't greater than 11000N,but the Centaur Upper Stage 's thrust is 21200 N,i don't know why? could you guys help me? thanks! |
From: Mike V. <kmm...@gm...> - 2023-12-12 03:59:09
|
Hello all, I've been trying to simulate a mission where a separated dispenser ejects cubesats. Now, I am trying to formulate this setting in GUI, but cannot figure out anything else besides just having cubesats to start flying with different initial epochs and true anomalies. My main interest here is to simulate the flight of the ejected cubesats right after their ejection out of the dispenser. Is there any other way to accomplish this idea in GMAT? Best regards, Mike |
From: Dhrumil P. <dp...@ym...> - 2023-11-30 10:53:45
|
Dear GMAT Development Team, I am writing on behalf of Conex Research to seek your expert assistance with an issue we are currently facing with the General Mission Analysis Tool (GMAT).Our team is working on a project that involves direct transfer trajectories to Saturn and utilizing Venus's gravity assist. The core of our analysis depends on accurately simulating these trajectories using the latest ephemeris data. However, we have encountered a significant hurdle.After loading the de441.bsp ephemeris data file for the period post-2050 into GMAT, we consistently receive an error message. This issue has raised concerns about whether we are utilizing the ephemeris data correctly within GMAT. We would greatly appreciate any guidance or support you can provide to help us resolve this issue. Insights into the correct procedure for loading and using ephemeris data, especially for extended time frames such as post-2050, would be invaluable for our project's progress. We are eager to ensure that our usage of GMAT aligns with best practices and that our simulations are as accurate and reliable as possible. Your expertise in this matter would not only assist us in overcoming our current challenge but also contribute significantly to the success of our project.Thank you for your time and consideration. We look forward to your valuable input and are available for any further discussions or clarifications needed. Best Regards, Dhrumil PatadiaConex Research |
From: Cooley, D S. (GSFC-5950) <d.s...@na...> - 2023-11-27 23:42:09
|
GMAT R2022a was built for MacOS 12 (Monterey) and 13 (Ventura) based machines, and has been tested on those platforms. MacOS 14 (Sonoma) is showing run time issues for the GMAT GUI on Apple Silicon (M1, M2, M3) based machines. The GMAT Console application continues to run as expected on MacOS Sonoma for these machines. MacOS development is currently paused due to funding issues. We will address the Sonoma runtime issues when resources become available. |
From: Tamas P. <tam...@sp...> - 2023-11-16 04:09:44
|
Greetings, I am trying to run lifecycle analysis with GMAT and plotting Time vs altitude graph until the satellite reaches an altitude of 180 km from 500 km. Every time I run the script, GMAT is getting stuck after some time. How to solve it ? Sincerely, Tamas Pal Mollarpur Kamar Para Village/Town and Post - Mallarpur Birbhum West Bengal - 731216 India Contact: tam...@sp... tam...@sp... <tam...@sp...> tam...@kg... Website: https://spiritoftime.co.in |
From: Mike V. <kmm...@gm...> - 2023-11-05 04:34:32
|
Hello, I'm having trouble to follow the examples in the API documentation. Particularly, any statement using __gmat__.Construct(*args) passes a NoneType value. Example: *Traceback (most recent call last): * * File "<input>", line 1, in <module> eartheq = gmat.Construct("Spacecraft", "CubSat") File "/home/mike/GMAT/R2022a/bin/gmatpy/_py38/gmat_py.py", line 23901, in Construct typestr = val.GetTypeName() AttributeError: 'NoneType' object has no attribute 'GetTypeName'* ======== Notes - Python version: 3.8 - Linux - GMAT API for Python configured according to the GMAT included documentation Let me know if you need more details. ======== Cannot figure out why the args are passed as None values. I'd appreciate any help. Best regards, Mike |
From: Tamas P. <tam...@sp...> - 2023-11-04 04:36:19
|
Greetings, I am trying to use GMAT instead of Freeflyer. I am trying to get a function like InRegion(), InShadows() or fine Range, RangeRate, Elevation of satellite from GroundStation and use it in the script for some logical operations. I want to develop all the sample scripts of Freeflyer in GMAT. Is it possible since I am not getting similar functions in GMAT? If there is any reference for all the functions of GMAT please provide that. Sincerely, Tamas Pal Mollarpur Kamar Para Village/Town and Post - Mallarpur Birbhum West Bengal - 731216 India Contact: tam...@sp... tam...@sp... <tam...@sp...> tam...@kg... Website: https://spiritoftime.co.in |
From: Tamas P. <tam...@sp...> - 2023-10-28 05:54:23
|
Greetings, I am trying to get ephemeris (X,Y,Z,VX,VY,VZ in txt/report/csv format) from tle using sgp4 propagator for one day. How to do it ? Which frame should I use as teme frame? Sincerely, Tamas Pal Mollarpur Kamar Para Village/Town and Post - Mallarpur Birbhum West Bengal - 731216 India Contact: tam...@sp... tam...@sp... <tam...@sp...> tam...@kg... Website: https://spiritoftime.co.in |