Spherical harmonics variations does not work

[manuflo97]

Hi guys, I was trying to use the gravity_field_variation function but it does not have any effect (https://py.api.tudat.space/en/latest/gravity_field_variation.html#functions).
There is probably some issue with the conda package.

[DominicDirkx]

Hi Manuel,

You had a python script where you were trying to use this functionality. Could you link to it?

[DominicDirkx]

So, apparently the conda package is fine, it's my understanding of Python when writing the examples that is wrong. This works:

gravity_field_variation_settings = list( )
gravity_field_variation_settings.append(environment_setup.gravity_field_variation.solid_body_tide(
     tide_raising_body, love_number_Io, degree))
body_settings.get("Io").gravity_field_variation_settings = gravity_field_variation_settings

This:

body_settings.get("Io").gravity_field_variation_settings.append(environment_setup.gravity_field_variation.solid_body_tide(
     tide_raising_body, love_number_Io, degree))

does not. I think it's because body_settings.get("Io").gravity_field_variation_settings returns the list of gravity field variations, and not a reference/pointer. I'll update the docs

[manuflo97]

Thanks a lot!