New Ephemerides Of The Martian Moons

Observations by MOLA (Mars Orbiting Laser Altimeter) on the Mars Global Surveyor spacecraft and HRSC (High-Resolution Stereo Camera) on Mars Express have recently shown significant offsets between the observed and predicted positions of Phobos and Deimos. We present new ephemerides of the Martian satellites, derived for the first time by a complete numerical way. A highly sensitive modeling has been introduced. In particular, the tidal bulges raised by each moon on the planet have been modelled offering the possibility to fit directly the Martian dissipation factor Q. Our model benefits from Earth-based observations from 1877 to 2003 and from all available spacecraft observations since the early 70s up to the current day.