Tracking stations are the cogs that made the Mariner IV flight a success. Like this one in Spain they receive pieces and bits of information from the Satellite's tape recorder that are translated into the most remarkable space pictures ever made. Tilt down from sky to tracking station in desert. TLS/MS's - satellite dish at tracking station. Panning TLS technicians working in information hub. CU man talking into headset. CU oscilloscope. MS teletype machine, zoom into CU tickertape feeding out on left-hand side. MS technician reviewing charts at data tape machines, zoom in to CU Memorex data tape spinning slowly on machine. CU man smiling, wearing communications headset. MS teletype machine. CUs flashing computer dials, buttons, counters, electrical boards, etc. Satellite photos of Martian surface. Control room, station.