gmat-developers — GMAT development

Re: [Gmat-developers] [EXTERNAL] Re: User Issue with Mars Exponential Atmosphere Model

[Dove, E. (GSFC-5950) <edw...@na...>]

Hello S.Matthew,

Currently users can make use of the external force model plugin to incorporate additional forces not available in the application natively.
A few end users have gone this route to incorporate newer Earth atmospheric models and other forces.
There is a brief section on the external force model in the users guide bundled with GMAT.

Also the <gmat-root>\samples\Ex_R2025a_ExternalForceModel.script and <gmat-root>\samples\Ex_R2025a_ExternalForceModel_NoAPI.script sample scripts should be useful to get you started. These sample scripts require the use of the Python interface.

We're investigating if we can incorporate the Mars GRAM model plugin into a future release as well as fixing the exponential model. This is not a certainty though and would be based on available resources.
Track ticket https://gmat.atlassian.net/browse/GMT-8441 on the Mars GRAM for a future release if you are interested on the progress with that.

If you would like to discuss partnership opportunities where we can expedite new feature implementations and bug fixes, let me know.

Hopefully the external force model plugin is a good alternative for you.

Regards,
Edwin

From: Sharath Mathew <s.m...@ou...>
Sent: Wednesday, August 6, 2025 6:25 AM
To: Dove, Edwin (GSFC-5950) <edw...@na...>; gma...@li...
Subject: [EXTERNAL] Re: [Gmat-developers] User Issue with Mars Exponential Atmosphere Model

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.


Hi Edwin,

Thanks for letting me know. What would you advise is the best course of action at the moment? Is there some kind of alternative / different approach to achieve the drag effects on Mars?


________________________________
From: Dove, Edwin (GSFC-5950) <edw...@na...>
Sent: 05 August 2025 15:38
To: Sharath Mathew <s.m...@ou...>; gma...@li... <gma...@li...>
Subject: RE: [Gmat-developers] User Issue with Mars Exponential Atmosphere Model


Hello S.Matthew,



The following bug was created that I believe captures what you are experiencing:

https://gmat.atlassian.net/browse/GMT-8160



Edwin



From: Sharath Mathew <s.m...@ou...>
Sent: Monday, August 4, 2025 4:52 PM
To: gma...@li...
Subject: [EXTERNAL] [BULK] [Gmat-developers] User Issue with Mars Exponential Atmosphere Model



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.



Dear developer(s) of GMAT,



I am an avid aerospace enthusiast and just a beginner to the GMAT software, having recently installed it for a project simulating an aerocapture scenario with Mars. I am encountering an issue with the Mars atmosphere model and, after having unsuccessfully tried several options, have decided to write to ask for guidance.



I am using the in-built exponential atmosphere model with spherica drag model for my propagator and Rungekutta89 as the integrator. I have my incoming hyperbolic trajectory going deep enough through the Martian atmosphere for atmospheric drag to have a noticeable effect. However, while running the simulation the drag is not taken into account and the spacecraft continues on the hyperbolic path. In the report file, the atmospheric density is displayed as 0 all throughout for all altitudes and there is no effect on acceleration or velocity. I have verified that GMAT is reading the MarsExponentialAtmosphereData.txt file by deliberately messing with the formatting of the contents and receiving the error on the message console. So, I don't suspect the issue to be with the path file or that sort. I have tried doing this on both version 2025a and 2022a.



I have tested atmospheric drag effects with Earth using the MSISE90 model and it seems to work fine for up to 100km (going below seemed to be an issue due to the integrator settings, though I've checked strict settings for Mars to no avail). Just as a measure, I replaced the default Mars exponential txt file with simpler values but that also has no effect on the simulation run. I suspect that GMAT is indeed reading the values from the file but for some reason just ignoring them. The parameters for mass, drag coefficient and area are all realistic as well as the force model settings. Could you please advise me on what I'm doing wrong or if I'm missing something? I have tried all this on both the 2025a and 2022a version as stated before but none seem to compute the Martian atmosphere at all. Thank you for your time and support!



Yours sincerely,

S. Mathew

Re: [Gmat-developers] User Issue with Mars Exponential Atmosphere Model

[Moussa F. <fm...@ep...>]

Hi Edwin,
The problem is definitely the bug in the link provided by Sharah. I make
some simulation but even reducing the MAVEN spacecraft near Mars or even
puting puting the earth atmosphere model to the mars atmosphere data I
still get 0. I suggest using AGI STK. You can get a free trial for 14 days.
Here is the link https://www.agi.com/products

Le mer. 6 août 2025 à 10:25, Sharath Mathew <s.m...@ou...> a
écrit :

> Hi Edwin,
>
> Thanks for letting me know. What would you advise is the best course of
> action at the moment? Is there some kind of alternative / different
> approach to achieve the drag effects on Mars?
>
>
> ------------------------------
> *From:* Dove, Edwin (GSFC-5950) <edw...@na...>
> *Sent:* 05 August 2025 15:38
> *To:* Sharath Mathew <s.m...@ou...>;
> gma...@li... <
> gma...@li...>
> *Subject:* RE: [Gmat-developers] User Issue with Mars Exponential
> Atmosphere Model
>
>
> Hello S.Matthew,
>
>
>
> The following bug was created that I believe captures what you are
> experiencing:
>
> https://gmat.atlassian.net/browse/GMT-8160
>
>
>
> Edwin
>
>
>
> *From:* Sharath Mathew <s.m...@ou...>
> *Sent:* Monday, August 4, 2025 4:52 PM
> *To:* gma...@li...
> *Subject:* [EXTERNAL] [BULK] [Gmat-developers] User Issue with Mars
> Exponential Atmosphere Model
>
>
>
> *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.
>
>
>
> Dear developer(s) of GMAT,
>
>
>
> I am an avid aerospace enthusiast and just a beginner to the GMAT
> software, having recently installed it for a project simulating an
> aerocapture scenario with Mars. I am encountering an issue with the Mars
> atmosphere model and, after having unsuccessfully tried several options,
> have decided to write to ask for guidance.
>
>
>
> I am using the in-built exponential atmosphere model with spherica drag
> model for my propagator and Rungekutta89 as the integrator. I have my
> incoming hyperbolic trajectory going deep enough through the Martian
> atmosphere for atmospheric drag to have a noticeable effect. However, while
> running the simulation the drag is not taken into account and the
> spacecraft continues on the hyperbolic path. In the report file, the
> atmospheric density is displayed as 0 all throughout for all altitudes and
> there is no effect on acceleration or velocity. I have verified that GMAT
> is reading the MarsExponentialAtmosphereData.txt file by deliberately
> messing with the formatting of the contents and receiving the error on the
> message console. So, I don't suspect the issue to be with the path file or
> that sort. I have tried doing this on both version 2025a and 2022a.
>
>
>
> I have tested atmospheric drag effects with Earth using the MSISE90 model
> and it seems to work fine for up to 100km (going below seemed to be an
> issue due to the integrator settings, though I've checked strict settings
> for Mars to no avail). Just as a measure, I replaced the default Mars
> exponential txt file with simpler values but that also has no effect on the
> simulation run. I suspect that GMAT is indeed reading the values from the
> file but for some reason just ignoring them. The parameters for mass, drag
> coefficient and area are all realistic as well as the force model settings.
> Could you please advise me on what I'm doing wrong or if I'm missing
> something? I have tried all this on both the 2025a and 2022a version as
> stated before but none seem to compute the Martian atmosphere at all. Thank
> you for your time and support!
>
>
>
> Yours sincerely,
>
> S. Mathew
>
>
> _______________________________________________
> GMAT-developers mailing list
> GMA...@li...
> https://lists.sourceforge.net/lists/listinfo/gmat-developers
>


-- 
*Moussa FALL*
ing Polytechnicien de Conception en Informatique et Télécom*, *Spécialiste
dans le développement de systèmes spatiaux
*.*

Re: [Gmat-developers] User Issue with Mars Exponential Atmosphere Model

[Sharath M. <s.m...@ou...>]

Hi Edwin,

Thanks for letting me know. What would you advise is the best course of action at the moment? Is there some kind of alternative / different approach to achieve the drag effects on Mars?


________________________________
From: Dove, Edwin (GSFC-5950) <edw...@na...>
Sent: 05 August 2025 15:38
To: Sharath Mathew <s.m...@ou...>; gma...@li... <gma...@li...>
Subject: RE: [Gmat-developers] User Issue with Mars Exponential Atmosphere Model


Hello S.Matthew,



The following bug was created that I believe captures what you are experiencing:

https://gmat.atlassian.net/browse/GMT-8160



Edwin



From: Sharath Mathew <s.m...@ou...>
Sent: Monday, August 4, 2025 4:52 PM
To: gma...@li...
Subject: [EXTERNAL] [BULK] [Gmat-developers] User Issue with Mars Exponential Atmosphere Model



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.



Dear developer(s) of GMAT,



I am an avid aerospace enthusiast and just a beginner to the GMAT software, having recently installed it for a project simulating an aerocapture scenario with Mars. I am encountering an issue with the Mars atmosphere model and, after having unsuccessfully tried several options, have decided to write to ask for guidance.



I am using the in-built exponential atmosphere model with spherica drag model for my propagator and Rungekutta89 as the integrator. I have my incoming hyperbolic trajectory going deep enough through the Martian atmosphere for atmospheric drag to have a noticeable effect. However, while running the simulation the drag is not taken into account and the spacecraft continues on the hyperbolic path. In the report file, the atmospheric density is displayed as 0 all throughout for all altitudes and there is no effect on acceleration or velocity. I have verified that GMAT is reading the MarsExponentialAtmosphereData.txt file by deliberately messing with the formatting of the contents and receiving the error on the message console. So, I don't suspect the issue to be with the path file or that sort. I have tried doing this on both version 2025a and 2022a.



I have tested atmospheric drag effects with Earth using the MSISE90 model and it seems to work fine for up to 100km (going below seemed to be an issue due to the integrator settings, though I've checked strict settings for Mars to no avail). Just as a measure, I replaced the default Mars exponential txt file with simpler values but that also has no effect on the simulation run. I suspect that GMAT is indeed reading the values from the file but for some reason just ignoring them. The parameters for mass, drag coefficient and area are all realistic as well as the force model settings. Could you please advise me on what I'm doing wrong or if I'm missing something? I have tried all this on both the 2025a and 2022a version as stated before but none seem to compute the Martian atmosphere at all. Thank you for your time and support!



Yours sincerely,

S. Mathew

Re: [Gmat-developers] User Issue with Mars Exponential Atmosphere Model

[Dove, E. (GSFC-5950) <edw...@na...>]

Hello S.Matthew,

The following bug was created that I believe captures what you are experiencing:
https://gmat.atlassian.net/browse/GMT-8160

Edwin

From: Sharath Mathew <s.m...@ou...>
Sent: Monday, August 4, 2025 4:52 PM
To: gma...@li...
Subject: [EXTERNAL] [BULK] [Gmat-developers] User Issue with Mars Exponential Atmosphere Model

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.


Dear developer(s) of GMAT,

I am an avid aerospace enthusiast and just a beginner to the GMAT software, having recently installed it for a project simulating an aerocapture scenario with Mars. I am encountering an issue with the Mars atmosphere model and, after having unsuccessfully tried several options, have decided to write to ask for guidance.

I am using the in-built exponential atmosphere model with spherica drag model for my propagator and Rungekutta89 as the integrator. I have my incoming hyperbolic trajectory going deep enough through the Martian atmosphere for atmospheric drag to have a noticeable effect. However, while running the simulation the drag is not taken into account and the spacecraft continues on the hyperbolic path. In the report file, the atmospheric density is displayed as 0 all throughout for all altitudes and there is no effect on acceleration or velocity. I have verified that GMAT is reading the MarsExponentialAtmosphereData.txt file by deliberately messing with the formatting of the contents and receiving the error on the message console. So, I don't suspect the issue to be with the path file or that sort. I have tried doing this on both version 2025a and 2022a.

I have tested atmospheric drag effects with Earth using the MSISE90 model and it seems to work fine for up to 100km (going below seemed to be an issue due to the integrator settings, though I've checked strict settings for Mars to no avail). Just as a measure, I replaced the default Mars exponential txt file with simpler values but that also has no effect on the simulation run. I suspect that GMAT is indeed reading the values from the file but for some reason just ignoring them. The parameters for mass, drag coefficient and area are all realistic as well as the force model settings. Could you please advise me on what I'm doing wrong or if I'm missing something? I have tried all this on both the 2025a and 2022a version as stated before but none seem to compute the Martian atmosphere at all. Thank you for your time and support!

Yours sincerely,
S. Mathew

[Gmat-developers] User Issue with Mars Exponential Atmosphere Model

[Sharath M. <s.m...@ou...>]

Dear developer(s) of GMAT,

I am an avid aerospace enthusiast and just a beginner to the GMAT software, having recently installed it for a project simulating an aerocapture scenario with Mars. I am encountering an issue with the Mars atmosphere model and, after having unsuccessfully tried several options, have decided to write to ask for guidance.

I am using the in-built exponential atmosphere model with spherica drag model for my propagator and Rungekutta89 as the integrator. I have my incoming hyperbolic trajectory going deep enough through the Martian atmosphere for atmospheric drag to have a noticeable effect. However, while running the simulation the drag is not taken into account and the spacecraft continues on the hyperbolic path. In the report file, the atmospheric density is displayed as 0 all throughout for all altitudes and there is no effect on acceleration or velocity. I have verified that GMAT is reading the MarsExponentialAtmosphereData.txt file by deliberately messing with the formatting of the contents and receiving the error on the message console. So, I don't suspect the issue to be with the path file or that sort. I have tried doing this on both version 2025a and 2022a.

I have tested atmospheric drag effects with Earth using the MSISE90 model and it seems to work fine for up to 100km (going below seemed to be an issue due to the integrator settings, though I've checked strict settings for Mars to no avail). Just as a measure, I replaced the default Mars exponential txt file with simpler values but that also has no effect on the simulation run. I suspect that GMAT is indeed reading the values from the file but for some reason just ignoring them. The parameters for mass, drag coefficient and area are all realistic as well as the force model settings. Could you please advise me on what I'm doing wrong or if I'm missing something? I have tried all this on both the 2025a and 2022a version as stated before but none seem to compute the Martian atmosphere at all. Thank you for your time and support!

Yours sincerely,
S. Mathew

[Gmat-developers] GMAT 2025a: unable to use the Open Frame Interface View Editor

[Adam D. <ada...@gm...>]

Hello,

I recently installed GMAT R2025a in my Windows 11 laptop.
When I try to open the Open Frame Interface View Definition Editor I get a
warped, unusable form. It is impossible to change the size of the View
Definition Editor window or to write anything to it. See the
attached GMAT_R2025a_OFI_View_Definition.jpg.

In GMAT R2022a (previously installed on the same laptop) it was perfectly
possible to  resize and  access the form and to edit its content.  See the
attached GMAT_R2022a_OFI_View_Definition.jpg.

I re-installed GMAT R2025a to see whether this move can fix the problem but
it didn't help.

is there anything I can do to improve the situation?

Thank you fr your help. Any suggestion is welcome.
Kind regards,
Antimo

Re: [Gmat-developers] [EXTERNAL] [BULK] Installation MAC OS

[Bastian <bas...@fr...>]

Hello M Dove, 

Thanks a lot, I have already done the “Open anyway” thing, but the wiki you sent talks about the “drag the app around” to clear the flag about sandboxing the application. I did not know this trick at all. 

Anyway, GMAT is now successfully installed and ready to use. 

Thank you,

Have a nice day, 
Best regards 

Bastian Crenn.

> 
> On 30 Apr 2025, at 3:37 PM, Dove, Edwin (GSFC-5950) <edw...@na...> wrote:
> 
> 
> Hello Bastian,
>  
> Did you see GMAT show up in the ‘System Settings’ -> ‘Privacy & Security’ section and click the ‘Open Anyway’ button as indicated in this wiki https://gmat.atlassian.net/wiki/pages/viewpage.action?pageId=2921332741?
>  
> When testing the installation I noticed on some systems there was no need to go to ‘Privacy & Security’ but other there was.
> I am not a power Mac user so it is unclear to me why there is this difference between machines.
>  
> Edwin
>  
> From: Bastian <bas...@fr...>
> Sent: Wednesday, April 30, 2025 4:50 AM
> To: gma...@li...
> Subject: [EXTERNAL] [BULK] [Gmat-developers] Installation MAC OS
>  
> 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.
> 
> 
> 
> Hi,
> 
> I am trying to install GMAT R2025a on my Mac book Air, with 14.4.1 Sonoma, M2 chip. 
> 
> However, despite following the instructions regarding the location of the folder and after a lot of tries. I keep receiving the same error at launch : GMAT incorrectly installed. 
> 
>  
> 
> I joined one screen in order for you to verify my installation. 
> 
> I have tried the other location (User/UserName/Application) and the error is the same.
> 
>  
> 
> Would you have an idea about what I can do ? I have already look up on internet, blogs but I can't find anything.
> 
> I hope we will be able to resolve this issue, 
> 
> Best regards, 
> 
> <image001.png>

Re: [Gmat-developers] [EXTERNAL] [BULK] Installation MAC OS

[Dove, E. (GSFC-5950) <edw...@na...>]

Hello Bastian,

Did you see GMAT show up in the 'System Settings' -> 'Privacy & Security' section and click the 'Open Anyway' button as indicated in this wiki https://gmat.atlassian.net/wiki/pages/viewpage.action?pageId=2921332741?

When testing the installation I noticed on some systems there was no need to go to 'Privacy & Security' but other there was.
I am not a power Mac user so it is unclear to me why there is this difference between machines.

Edwin

From: Bastian <bas...@fr...>
Sent: Wednesday, April 30, 2025 4:50 AM
To: gma...@li...
Subject: [EXTERNAL] [BULK] [Gmat-developers] Installation MAC OS

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.



Hi,

I am trying to install GMAT R2025a on my Mac book Air, with 14.4.1 Sonoma, M2 chip.

However, despite following the instructions regarding the location of the folder and after a lot of tries. I keep receiving the same error at launch : GMAT incorrectly installed.



I joined one screen in order for you to verify my installation.

I have tried the other location (User/UserName/Application) and the error is the same.



Would you have an idea about what I can do ? I have already look up on internet, blogs but I can't find anything.

I hope we will be able to resolve this issue,

Best regards,
[Screen.png]

[Gmat-developers] Installation MAC OS

[Bastian <bas...@fr...>]

Hi,

I am trying to install GMAT R2025a on my Mac book Air, with 14.4.1 Sonoma, M2 chip. 

However, despite following the instructions regarding the location of the folder and after a lot of tries. I keep receiving the same error at launch : GMAT incorrectly installed. 



I joined one screen in order for you to verify my installation. 

I have tried the other location (User/UserName/Application) and the error is the same.



Would you have an idea about what I can do ? I have already look up on internet, blogs but I can't find anything.

I hope we will be able to resolve this issue, 

Best regards, 

[Gmat-developers] GMAT Scripting Extension for Vscode

[Moussa F. <fm...@ep...>]

Hello Everyone, yesterday I released my first gmat scripting extension for
vscode.
Here is the download link and the readme file.
Feel free to tested and also make feedback for improvement
https://github.com/kallah94/vscode-gmat-script-v0.1.0/releases/tag/v0.1.0

Best Regards[image: gmat-scripting.png]

[Gmat-developers] GMAT Issue: GMT-8190 "Add Capability to compute RA, DEC of a Lagrangian Point"

[<ant...@t-...>]

Good morning,

 

GMT-8190 "Add Capability to compute RA,DEC of a Lagrangian Point" shows up
as "assigned to DJC"  but I found no reference of it in the GMT issues
solved in the R2025a release.

Therefore I assume that it has not been solved yet.  If so, is it scheduled
to be solved in the next release?

 

When I issued GMT-8190 on July 5, 2024 Steven Slojkowski suggested a
solution, but that solution didn't work, as reported in 8190. 
Is there any workaround for this problem?

 

Thank you, and congratulations for GMAT R2025a: in general it's a good
improvement w.r.t. the past version.

 

Kind regards,

Dr. A. Damiano

Flight Dynamics Senior Consultant

Re: [Gmat-developers] Will there be a version of GMAT compatible with Mac OSX Sequoia using Intel Chipset?

[Dove, E. (GSFC-5950) <edw...@na...>]

Hello Samuel,


  *   The R2025a Mac bundle is only compatible with the Apple silicon chipsets.
Additional development time would be needed to make a universal macOS binary (Intel & Silicon compatible) application and we unfortunately did not have the resources/time to do that for R2025a.
  *   Since the R2025a Mac bundle is not a universal macOS binary, Mac Intel users would need to compile the code with adjustments to the cmake and some files to make a bundle compatible with the Intel chipset. GMAT compile instructions are located in the following wiki: https://gmat.atlassian.net/wiki/pages/viewpage.action?pageId=380273355
     *   There a Mac specific instructions that have to be added to that wiki, but at a high level it has the information needed to compile GMAT. Comments can be added to the wiki for the adjustments needed for the Mac.
  *   The following ticket has been created to capture the work to make the Mac build universal but the current projected completion date is TBD: https://gmat.atlassian.net/browse/GMT-8340
     *   In the event a customer requests this functionality we will update the ticket.


[NASA Meatball Logo]<https://www.nasa.gov/>

Edwin Dove
Flight Dynamics Software Systems Engineer
GMAT Product Development Lead (PDL)
NASA Goddard Space Flight Center
Navigation & Mission Design Branch (Code 595)


From: Samuel H Dupree Jr <sd...@sp...>
Sent: Thursday, April 24, 2025 11:42 AM
To: gma...@li...
Cc: gma...@li...
Subject: [EXTERNAL] [BULK] [Gmat-developers] Will there be a version of GMAT compatible with Mac OSX Sequoia using Intel Chipset?
Importance: High

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.



The Read-me file for version R2025a of GMAT says that it is incompatible with Mac OSX Sequoia (15.4.1) using the Intel chipset, but was built for and compatible with the Apple M2 chip-set.

  *   Is this correct, or is it really a "fat" application meaning that R2025a of GMAT can run under both chip-sets?
  *   If so what is the correct installation procedure to void getting an incorrect installation error message? I
  *   If R2025a is not a "fat" application, will there be a release of GMAT that is compatible with Mac OSX Sequoia using the Intel chipset, and if so when will it be released?

Please advise.

Samuel Dupree.

[Gmat-developers] Will there be a version of GMAT compatible with Mac OSX Sequoia using Intel Chipset?

[Samuel H D. Jr <sd...@sp...>]

The Read-me file for version R2025a of GMAT says that it is incompatible 
with Mac OSX Sequoia (15.4.1) using the Intel chipset, but was built for 
and compatible with the Apple M2 chip-set.

  * Is this correct, or is it really a "fat" application meaning that
    R2025a of GMAT can run under both chip-sets?
  * If so what is the correct installation procedure to void getting an
    incorrect installation error message? I
  * If R2025a is not a "fat" application, will there be a release of
    GMAT that is compatible with Mac OSX Sequoia using the Intel
    chipset, and if so when will it be released?

Please advise.

Samuel Dupree.

Re: [Gmat-developers] [EXTERNAL] [BULK] Cannot install GMAT 2022

[Dove, E. (GSFC-5950) <edw...@na...>]

Hi Tom,

If you can, please create a ticket for this issue at https://gmat.atlassian.net/jira with as much detail as you are comfortable providing about your system.
I have not come across an issue like this before.
Staffing is limited at the moment but we’ll mark this as something to look into.

Edwin

From: Tom The Tank <tho...@gm...>
Sent: Tuesday, March 4, 2025 5:35 AM
To: gma...@li...
Subject: [EXTERNAL] [BULK] [Gmat-developers] Cannot install GMAT 2022

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.


Hello,

Ive been trying to install GMAT 2022 but I keep getting these error messages when launching the GMAT.exe. I've managed to get GMAT 2018 running via the windows installer but cannot get GMAT 2022 working. I was wondering if you guys had any solutions?

Thank you,
Tom

[cid:image001.png@01DB8EC2.22449080]
[cid:image002.png@01DB8EC2.22449080]

[Gmat-developers] WG: GMAT: Any News about GMT-8190 Resolution?

[<ant...@t-...>]

Good morning,

 

is there anything new on about the resolution of GMT-8190 "Add Capability to
compute RA,DEC of a Lagrangian Point" ?

 

Thank you.

Best regards,

 

Antimo

 

Von: ant...@t-... <ant...@t-...> 
Gesendet: Mittwoch, 29. Januar 2025 16:44
An: 'gma...@li...'
<gma...@li...>
Betreff: GMAT: Any News about GMT-8190 Resolution?

 

Good morning,

 

I submitted GMT-8190 "Add Capability to compute RA,DEC of a Lagrangian
Point" on July 5th 2024.

I promptly received some suggestions from Steven Slojkowski (thank you!) and
I replied to that answer confirming that, despite the suggestions the
situation has not changed.

GMT-8190 was subsequently assigned to "DJC" but I got no further reply.

 

Trying to use a user-defined object like Lagrangian Point EarthMoonL2 always
leads GMAT to issue the error message:

**** ERROR **** Interpreter Exception: Invalid dependency name "EarthMoonL2"
found for Parameter type "RadPer" in line:[.]

 

I had a look at: 

https://gmat.atlassian.net/projects/GMT/versions/11503/tab/release-report-al
l-issues

but I was unable to find GMAT-8190 in the list of problems solved.



 

Is there any plan to solve GMT-8190 in a future version?

Can anybody suggest a solution to the problem I described in GMT-8190? The
suggestions provided in Steven's email did not work.

 

Thank you for any help you'll be able to provide.

Best regards,

 

Dr. Antimo Damiano

Schwarzer Weg 2

64287 Darmstadt

Mobil: 01707349995

ant...@t-... <mailto:ant...@t-...> 

 

[Gmat-developers] Cannot install GMAT 2022

[Tom T. T. <tho...@gm...>]

Hello,

Ive been trying to install GMAT 2022 but I keep getting these error
messages when launching the GMAT.exe. I've managed to get GMAT 2018 running
via the windows installer but cannot get GMAT 2022 working. I was wondering
if you guys had any solutions?

Thank you,
Tom

[image: image.png]
[image: image.png]

Re: [Gmat-developers] Help for equatorial plane altitude problem

[Moussa F. <fm...@ep...>]

Yes I Think.

*Moussa FALL*
ing Polytechnicien de Conception en Informatique et Télécom*, *Spécialiste
dans le développement de systèmes spatiaux
*.*



On Mon, 17 Feb 2025 at 23:37, Kadir Taşkara <kad...@gm...>
wrote:

> Thank you! So you basically mean that the graph I obtain is just correct
> and it is caused by the gravity effects.
>
> Am I right?
>
> Thanks.
>
> 18 Şub 2025 Sal 02:33 tarihinde Moussa FALL <fm...@ep...> şunu yazdı:
>
>> Hi, Here are a few observations I made with your script.
>> 1) I plot the ECC evolution too and notice that the altitude oscillation
>> have the same evolution as the Ecc (see figures attached in this email)
>> 2) When  I put GMAT DefaultProp_ForceModel.GravityField.Earth.Degree = 0
>> and  GMAT DefaultProp_ForceModel.GravityField.Earth.Order = 0, I notice the
>> altitude and Eccentricity don't oscillate in the beginning but when the
>> eccentricity start to increase the altitude start immediately the
>> oscillation.
>> [image: PlotImage.png][image: PlotImageECC.png]
>>
>> My Conclusion the Oscillation you see in the altitude at 0 inclinaison is
>> due to the eccentricity value and the high value of Gravity Field Degree
>> and Order
>>
>> Le lun. 17 févr. 2025 à 21:26, Kadir Taşkara <kad...@gm...>
>> a écrit :
>>
>>> Hi there
>>>
>>> I am trying to analyze drag effect on LEO satellite.When I plot it, of
>>> course the altitude get decreased.
>>>
>>> Yet, we have a problem here. Since there is flattening of earth,
>>> altitude changes about 20 km from equator to polar, where the inclination
>>> is 90 degrees.
>>>
>>> But when I do it 0 degree, which is equatorial, the altitude still
>>> changes as 20 km. It is not normal. It shouldnt oscillate, it should only
>>> get down with time.
>>>
>>> Please check it. I just attached the file. If I have a mistake let me
>>> know please. How can I stop it oscillating?
>>>
>>> Thanks
>>> Kadir
>>>
>>>
>>>
>>> [image: Ekran görüntüsü 2025-02-18 001529.png]
>>>
>>> _______________________________________________
>>> GMAT-developers mailing list
>>> GMA...@li...
>>> https://lists.sourceforge.net/lists/listinfo/gmat-developers
>>>
>>
>>
>> --
>> *Moussa FALL*
>> ing Polytechnicien de Conception en Informatique et Télécom*, *Spécialiste
>> dans le développement de systèmes spatiaux
>> *.*
>>
>>

Re: [Gmat-developers] Help for equatorial plane altitude problem

[Moussa F. <fm...@ep...>]

Hi, Here are a few observations I made with your script.
1) I plot the ECC evolution too and notice that the altitude oscillation
have the same evolution as the Ecc (see figures attached in this email)
2) When  I put GMAT DefaultProp_ForceModel.GravityField.Earth.Degree = 0
and  GMAT DefaultProp_ForceModel.GravityField.Earth.Order = 0, I notice the
altitude and Eccentricity don't oscillate in the beginning but when the
eccentricity start to increase the altitude start immediately the
oscillation.
[image: PlotImage.png][image: PlotImageECC.png]

My Conclusion the Oscillation you see in the altitude at 0 inclinaison is
due to the eccentricity value and the high value of Gravity Field Degree
and Order

Le lun. 17 févr. 2025 à 21:26, Kadir Taşkara <kad...@gm...>
a écrit :

> Hi there
>
> I am trying to analyze drag effect on LEO satellite.When I plot it, of
> course the altitude get decreased.
>
> Yet, we have a problem here. Since there is flattening of earth, altitude
> changes about 20 km from equator to polar, where the inclination is 90
> degrees.
>
> But when I do it 0 degree, which is equatorial, the altitude still changes
> as 20 km. It is not normal. It shouldnt oscillate, it should only get down
> with time.
>
> Please check it. I just attached the file. If I have a mistake let me know
> please. How can I stop it oscillating?
>
> Thanks
> Kadir
>
>
>
> [image: Ekran görüntüsü 2025-02-18 001529.png]
>
> _______________________________________________
> GMAT-developers mailing list
> GMA...@li...
> https://lists.sourceforge.net/lists/listinfo/gmat-developers
>


-- 
*Moussa FALL*
ing Polytechnicien de Conception en Informatique et Télécom*, *Spécialiste
dans le développement de systèmes spatiaux
*.*

Re: [Gmat-developers] Help for equatorial plane altitude problem

[Kadir T. <kad...@gm...>]

Thank you! So you basically mean that the graph I obtain is just correct
and it is caused by the gravity effects.

Am I right?

Thanks.

18 Şub 2025 Sal 02:33 tarihinde Moussa FALL <fm...@ep...> şunu yazdı:

> Hi, Here are a few observations I made with your script.
> 1) I plot the ECC evolution too and notice that the altitude oscillation
> have the same evolution as the Ecc (see figures attached in this email)
> 2) When  I put GMAT DefaultProp_ForceModel.GravityField.Earth.Degree = 0
> and  GMAT DefaultProp_ForceModel.GravityField.Earth.Order = 0, I notice the
> altitude and Eccentricity don't oscillate in the beginning but when the
> eccentricity start to increase the altitude start immediately the
> oscillation.
> [image: PlotImage.png][image: PlotImageECC.png]
>
> My Conclusion the Oscillation you see in the altitude at 0 inclinaison is
> due to the eccentricity value and the high value of Gravity Field Degree
> and Order
>
> Le lun. 17 févr. 2025 à 21:26, Kadir Taşkara <kad...@gm...>
> a écrit :
>
>> Hi there
>>
>> I am trying to analyze drag effect on LEO satellite.When I plot it, of
>> course the altitude get decreased.
>>
>> Yet, we have a problem here. Since there is flattening of earth, altitude
>> changes about 20 km from equator to polar, where the inclination is 90
>> degrees.
>>
>> But when I do it 0 degree, which is equatorial, the altitude still
>> changes as 20 km. It is not normal. It shouldnt oscillate, it should only
>> get down with time.
>>
>> Please check it. I just attached the file. If I have a mistake let me
>> know please. How can I stop it oscillating?
>>
>> Thanks
>> Kadir
>>
>>
>>
>> [image: Ekran görüntüsü 2025-02-18 001529.png]
>>
>> _______________________________________________
>> GMAT-developers mailing list
>> GMA...@li...
>> https://lists.sourceforge.net/lists/listinfo/gmat-developers
>>
>
>
> --
> *Moussa FALL*
> ing Polytechnicien de Conception en Informatique et Télécom*, *Spécialiste
> dans le développement de systèmes spatiaux
> *.*
>
>

[Gmat-developers] Help for equatorial plane altitude problem

[Kadir T. <kad...@gm...>]

Hi there

I am trying to analyze drag effect on LEO satellite.When I plot it, of
course the altitude get decreased.

Yet, we have a problem here. Since there is flattening of earth, altitude
changes about 20 km from equator to polar, where the inclination is 90
degrees.

But when I do it 0 degree, which is equatorial, the altitude still changes
as 20 km. It is not normal. It shouldnt oscillate, it should only get down
with time.

Please check it. I just attached the file. If I have a mistake let me know
please. How can I stop it oscillating?

Thanks
Kadir



[image: Ekran görüntüsü 2025-02-18 001529.png]

[Gmat-developers] GMAT: Any News about GMT-8190 Resolution?

[<ant...@t-...>]

Good morning,

 

I submitted GMT-8190 "Add Capability to compute RA,DEC of a Lagrangian
Point" on July 5th 2024.

I promptly received some suggestions from Steven Slojkowski (thank you!) and
I replied to that answer confirming that, despite the suggestions the
situation has not changed.

GMT-8190 was subsequently assigned to "DJC" but I got no further reply.

 

Trying to use a user-defined object like Lagrangian Point EarthMoonL2 always
leads GMAT to issue the error message:

**** ERROR **** Interpreter Exception: Invalid dependency name "EarthMoonL2"
found for Parameter type "RadPer" in line:[.]

 

I had a look at: 

https://gmat.atlassian.net/projects/GMT/versions/11503/tab/release-report-al
l-issues

but I was unable to find GMAT-8190 in the list of problems solved.



 

Is there any plan to solve GMT-8190 in a future version?

Can anybody suggest a solution to the problem I described in GMT-8190? The
suggestions provided in Steven's email did not work.

 

Thank you for any help you'll be able to provide.

Best regards,

 

Dr. Antimo Damiano

Schwarzer Weg 2

64287 Darmstadt

Mobil: 01707349995

ant...@t-... <mailto:ant...@t-...> 

 

[Gmat-developers] Configuration of ContactLocator in gmatpy module

[Moussa F. <fm...@ep...>]

Hello,
I am working with Gmat python API and need to set up contact locator events
between a satellite and a ground segment.
here is my code
gaindesat = gmat.Construct("Spacecraft", "Gaindesat")
gaindesat.SetField("DateFormat", "UTCGregorian")
gaindesat.SetField("Epoch", "15 Jul 2024 21:00:00.000")
gaindesat.SetField("CoordinateSystem", "EarthMJ2000Eq")
gaindesat.SetField("DisplayStateType", "Keplerian")
gaindesat.SetField("SMA", 7800)
gaindesat.SetField("ECC", 0.00001)
gaindesat.SetField("INC", 98.5)
gaindesat.SetField("RAAN", 75)
gaindesat.SetField("AOP", 90)
gaindesat.SetField("TA", 85)
gaindesat.SetField("DryMass", 0.998)
gaindesat.SetField("Cd", 2.2)
gaindesat.SetField("Cr", 1.5)
gaindesat.SetField("DragArea", 0.015)
gaindesat.SetField("SRPArea", 0.015)

grds = gmat.Construct("GroundStation", "ControlCenter")
grds.SetField("StateType", "Spherical")
grds.SetField("HorizonReference", "Ellipsoid")
grds.SetField("Location1", 14.727500)
grds.SetField("Location2", -1719258)
grds.SetField("Location3", 0.008)
grds.SetField("Id", "12F")

accessevents = gmat.Construct("ContactLocator", "myContactLocator")
accessevents.SetField("Target", gaindesat.GetName())
accessevents.SetField("Observers", grds.GetName())
#accessevents.SetField("OccultingBodies", "Earth, Moon")
accessevents.SetField("InputEpochFormat", "UTCGregorian")
accessevents.SetField("InitialEpoch", "15 Jul 2024 21:00:00.000")
accessevents.SetField("FinalEpoch", "16 Jul 2024 21:00:00.000")
accessevents.SetField("IntervalStepSize", 10)

accessevents.help() show me target and observers are set but when i run
gmat.Initialize i have this error as output error setting observers on
ContactLocator myContactLocator. All observers must be either ground
stations or spacecraft.
Still gmat.ShowObjects("GroundStation") give me ControlCenter as about.
Does someone have the solution or face the same problem
Best regard

[Gmat-developers] Fwd: Using SPICE files in GMAT

[Julia A. <jul...@go...>]

---------- 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

[Gmat-developers] Early access to TDM to GMD converter tool

[Matthew S. <mat...@fi...>]

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

[Gmat-developers] Fwd: Installing GMAT

[Robert H. <hic...@gm...>]

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