Mars global surveyor orbit determination uncertainties using high resolution mars gravity models

The orbit determination work on the Mars Global Surveyor presented in this paper was performed at the Jet Propulsion Laboratory (JPL) and was conducted for the purpose of refining the Mars gravity field, as part of the radio science investigation. The orbit determination was performed using X-band one-way, two-way, three-way Doppler data, and two-way range data collected primarily from the Deep Space Network 34 in HEF tracking stations. A description of the mission and its trajectory will be provided, followed by a discussion of the orbit determination estimation procedure and models. Accuracies will be examined in terms of orbit-to-orbit solution differences and are determined for the latest gravity models.