GRAVITY FIELD AND DENSITY DISTRIBUTION IN THE MARTIAN INTERIOR.

The global distribution of Mars' interior densities has been studied on the basis of an approximate solution of the inverse problem of potential theory by using data on the planet's mean radius, mass, polar moment of inertia and gravity field parameters. This made it possible to determine the most likely range of variation of the density characteristics. Large-scale specific features of the Martian gravity field have been interpreted from data obtained on the three-dimensional density model of the planet, and its 'rough' gravity field has been shown to result from the impact of density inhomogeneities situated in a layer about 900 km thick.