Human Steps


This is the master clock used at the Goldstone, California, Deep Space Network station from about 1983 to 2006. It provided accurate time to spacecraft navigators and the station’s computers, antennas, radio transmitters, and receivers. 
This primary atomic frequency standard, a hydrogen maser, served as the stable frequency source for the master clock. Operating in an environmentally controlled vault at Goldstone, it continues to serve as a backup frequency source.