Potential orbit supporting package (satmad)

[rstoneback]

Is your feature request related to a problem? Please describe.
Stumbled upon satmad while in review. https://satmad.readthedocs.io/en/stable/about.html
It may be useful.

Describe the solution you'd like
Possible the package has features we could use. Has a satellite propagation module with 'full forces'

a) Numerical Propagation with full force model: Geopotentials, solar radiation pressure, 3rd body interactions, atmospheric drag b) Analytical Propagation: Two-Body

We may want to check it out.

Describe alternatives you've considered
Ignore potential supporting modules.

Additional context
Add any other context or screenshots about the feature request here.