Retrieving "Mars Global Surveyor" from the archives

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1. Areocentric Datum Standard 1998

   Linked via "Mars Global Surveyor"

   Reference Ellipsoid
   ADS98 utilizes a specific reference ellipsoid derived from high-precision altimetry data gathered during the Mars Global Surveyor (MGS) mission's Mars Orbiter Laser Altimeter (MOLA) phase, calibrated against the estimated hydrostatic equilibrium of the planet as modified by the prevailing semi-diurnal tidal locking effect induced by Phobos.
   The defining parameters for the ADS98 ellipsoid are: