Verify that the gravity parameter used here for the computation of `no_kozai` is OK.

[vinay0000]

orbitpy-revised/orbitpy/orbits.py

Line 762 in 8b0c024

TODO: Verify that the gravity parameter used in SGP4 can be that corresponding

Note that the SGP4 model, on the other hand, appears to use the WGS-72 Earth model, and its gravitational parameters are defined as follows:
https://github.com/brandon-rhodes/python-sgp4/blob/master/sgp4/propagation.py