[Ground-station] GMAT vs. STK/HPOP - call for help

[Juno Woods]

HEO as in highly elliptical or high earth orbit?

On Mon, Feb 8, 2021 at 2:36 PM Michelle Thompson <
mountain.michelle at gmail.com> wrote:

> Greetings Juno!
>
> The orbit that Jan was most interested in is a HEO orbit, perigee at
> 1250km. The concern was over some results he was getting with the SMAD
> spreadsheet and a relatively lightweight satellite.
>
> There's another set of work that Anshul Makkar is doing that shows GTO to
> Graveyard, but that so far doesn't have anything unexpected that we were
> looking to run by people with more experience and additional software.
>
> -Michelle W5NYV
>
>
>
>
> On Fri, Feb 5, 2021 at 12:30 PM Juno Woods <juno at openlunar.org> wrote:
>
>> Can you say more about the parameters? Is the satellite inserted into LEO
>> or GTO or some other orbit? Is phasing needed?
>>
>> On Fri, Jan 29, 2021 at 5:29 PM Michelle Thompson via Ground-Station
>> <ground-station at lists.openresearch.institute> wrote:
>>
>>> For the Debris Mitigation presentation to the FCC, we want to give
>>> answers (and show our work) about how much delta-v we need for some of the
>>> proposed orbits for minimum viable amateur spacecraft in the Amateur Radio
>>> Satellite Service.
>>>
>>> There's a question that Jan King and I have about a critical altitude
>>> and low surface_area:mass ratio spacecraft. It occurred to us that we
>>> really might want to compare results across two or more software packages
>>> to build some confidence.
>>>
>>> Jan has a set of results from a spreadsheet from SMAD.
>>>
>>> https://smad.com/
>>>
>>> The calculation under review is around 165km with a relatively
>>> lightweight 6U spacecraft. It's acting like it wants to do some strange
>>> things. Is this physics, or at a limit of the model?
>>>
>>> We have a couple of people who are good or are getting good at GMAT.
>>>
>>> https://software.nasa.gov/software/GSC-17177-1
>>>
>>> Question: Are the atmospheric models in GMAT good enough for this
>>> calculation?
>>>
>>> Does anyone have access to STK/HPOP to run this calculation, for
>>> comparison?
>>>
>>> https://www.agi.com/products/stk
>>>
>>> https://help.agi.com/stk/11.0.1/Content/hpop/hpop.htm
>>>
>>> Thank you,
>>> -Michelle W5NYV
>>>
>>>
>>>
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