Mars Dynamics, Atmospheric and Surface Properties: Determination from Viking Tracking Data

Science  17 Dec 1976:
Vol. 194, Issue 4271, pp. 1337-1339
DOI: 10.1126/science.194.4271.1337


Approximately 3 months of radio tracking data from the Viking landers have been analyzed to determine the lander locations, the orientation of the spin axis of Mars, and a first estimate from Viking data of the planet's spin rate. Preliminary results have also been obtained for atmospheric parameters and radii at occultation points and for properties of the surface in the vicinity of lander 1.