Delta II | Gravity Probe B
Space Launch Complex 2W
Vandenberg SFB, CA, USA
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United States Air Force
The United States Air Force (USAF) is the air service branch of the United States Armed Forces, and is one of the eight uniformed services of the United States. Originally created on 1 August 1907, as a part of the United States Army Signal Corps, the USAF was established as a separate branch of the United States Armed Forces in 1947 with the enactment of the National Security Act of 1947.
Gravity Probe B
Gravity Probe B (GP-B) was a satellite-based experiment to test two unverified predictions of general relativity: the geodetic effect and frame-dragging. This was to be accomplished by measuring, very precisely, tiny changes in the direction of spin of four gyroscopes contained in an Earth-orbiting satellite at 650 km (400 mi) altitude, crossing directly over the poles.
Delta II 7920-10C
Height 38.70 Meters
Max Stages 2
Mass To GTO 1842 kg
Liftoff Thrust 0 kN
Diameter 2.40 Meters
Mass To LEO 5959 kg
Liftoff Mass 0 Tonnes
Launch Success 17
Consecutive Success 17
Maiden Flight 1997-05-05
Launch Failures 0
