Launch Failure
Liftoff Time (GMT)
14:03:00
Tuesday May 20, 1975
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Transtage inertial measurement unit failure caused it to be stranded in low Earth orbit.
DSCS II, developed under Program 777, provided secure voice and data transmission for the United States Armed Forces. The program was managed by the Defense Communications Agency (DCA), now the Defense Information Systems Agency.
2 Payloads


Manufacturer
US Air ForceRocket
Height: 42m
Payload to Orbit
LEO: 13,100 kg
GTO: 3,000 kg
Liftoff Thrust
13,642 Kilonewtons
Fairing
Diameter: 3m
Stages
3
Strap-ons
2
85th
Mission
3rd
Mission of 1975
43rd
Orbital launch attempt