Celestial Mechanics
Deep Space Network tracking data from Mariner 4 were used to obtain improved measurements of the masses of Mars and the moon, the astronomical unit, and improved ephemerides of the earth and Mars. The experiment used the onboard receiver and transmitter equipment in conjunction with the Deep Space Station tracking equipment to obtain Doppler measurements. The experiment produced data of good quality from November 28, 1964, to December 8, 1967, although the period near May 1967 was noisy because of low signal strength.