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Updated Orbit Propagator #314

Merged
merged 6 commits into from
Feb 23, 2021
Merged

Updated Orbit Propagator #314

merged 6 commits into from
Feb 23, 2021

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kylekrol
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@kylekrol kylekrol commented Feb 21, 2021

Updated Orbit Propagator

Relates to #301.
Relates to #306.

Summary of Changes

  • Moved the orbit propagator completely into ECEF (this makes modelling many perturbations easier).
  • We're now properly using the geograv gravity model (i.e. calling in ECEF coordinates).
  • Added a simple exponential drag model that @srutiv had previously implemented in MATLAB.

Ptest Effects

NA

Testing

Qualitatively here you can see that the orbit in ECI still looks good - very slight precession about the z axis. The plots were generated with the following command:

python -m psim -s 500000 -p truth/orbit -ps 1000 -c sensors/base,truth/base,truth/deployment SingleOrbitGnc

orbit_eci
orbit_ecef
r_eci
v_eci

@kylekrol kylekrol marked this pull request as ready for review February 21, 2021 21:58
@kylekrol kylekrol requested a review from shihaocao February 21, 2021 21:58
@kylekrol kylekrol merged commit a8ff257 into master Feb 23, 2021
@kylekrol kylekrol deleted the feature/orbit-ecef branch February 23, 2021 01:21
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2 participants