Radar studies of Mars during the 1969 opposition (not yet completed) have yielded preliminary results. Elevation and radar brightness is presented as a function of longitude forareas between 3 ø and 12ø north latitude.
The radius of Venus has been determined from radar-range data taken at the Jet Propulsion Laboratory's Goldstone facility. A simultaneous intergration of the equations of motion of the solar-system fit to this time-delay data gave a value of 6053.7 +/- 2.2 kilometers. A discussion of other Venusian radius determinations is made.
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