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Currently looking at adding a ceres gravity model using dawn data found here: <https://sbnarchive.psi.edu/pds3/dawn/grav/> (DWNCGRS_2_v4_20240517)
Looking at the lbl for the coefficients
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Some details describing this model are:
The spherical harmonic coefficients are fully normalized.
The associated GM = 62.6290536121 km^3/s^2
The reference radius = 470.0 km
The Ceres-fixed reference frame prime meridian and pole
location in IAU coordinates is given by
Right ascension = 291.42763 degrees (estimated)
RA rate = 0.0 degrees/cty (fixed)
Declination = 66.76033 degrees (estimated)
Dec rate = 0.0 degrees/cty (fixed)
Prime Meridian = 170.309 degrees (estimated)
Rotation rate = 952.1532635 degrees/day (estimated)
The pole location, W0 and spin rate are estimated jointly with the
gravity field by fixing the y-value of the Kait landmark to zero.
The uncertainties of the pole for this solution are
Right ascension = 0.0002 degrees
Declination = 0.0002 degrees
Note ceres18d is similar to ceres18c version 2 of the gravity field
which has the corrected location of the kait crater. This is a
rotation of -0.064074 deg about the z-axis versus the previous
version of the gravity field.
```
I'm particularly worried about `Prime Meridian = 170.309 degrees (estimated)` value, what should the prime meridian for the model be to match with KSP? Is there any way to ensure the gravity model matches with the actual terrain data?