Gravity modeling of Mars and Venus at NASA/GSFC

The paper describes the results from the development of improved high-resolution gravity models of Mars and Venus carried out at Goddard Space Flight Center, together with the solution design and the tracking data employed. These models are spherical harmonic expansions complete to degrees 50 and 36 for Mars and Venus, respectively. Both models result in improved orbital computation accuracies over previously available models, and in improved resolution of geophysical features. The paper also discusses new developments anticipated in the future.