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2 questions
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Calculating velocity of Earth from JPL DE
We have discussed how to calculate positions from JPL development ephemerides in this question.
Following this answer, I am now using SPICE's algorithm for calculating the derivatives of the Chebyshev ...
- 371
3
votes
1
answer
136
views
For how many solar system bodies do recent JPL Development Ephemerides include libration?
Since the Earth and the Moon are so gravitationally and tidally engaged and the laser ranging data so precise, the JPL Development Ephemerides are based on extensive modeling of the Earth-Moon system ...
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