Evolution of INPOP planetary ephemerides
Abstract
The last version of the planetary ephemerides developed at the Paris Observatory and at the Besançon Observatory is presented here. INPOP08 is a 4-dimension ephemerides since it provides to users positions, velocities of planets and relation between TT and TDB. Investigations leaded to improve the modelling of asteroids are described as well as the new sets of observations used for the fit of INPOP08. New observations provided by the European Space Agency (ESA) deduced from the tracking of the Mars Express (MEX) and Venus Express (VEX) missions are presented as well as the normal point deduced from the Cassini mission. We show the huge impact brought by these observations in the fit of INPOP08, especially in term of Venus and Saturn orbits, Sun oblateness adjustment and PPN parameter β estimations.
- Publication:
-
Journées Systèmes de Référence Spatio-temporels 2008
- Pub Date:
- September 2009
- Bibcode:
- 2009jsrs.conf...65F
- Keywords:
-
- Earth rotation;
- reference systems;
- relativity;
- time;
- ephemerides