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USA-225, also known as the Rapid Pathfinder Prototype (RPP) and NRO Launch 66 (NROL-66), is an American satellite which was launched in 2011. The satellite is being used to perform technology demonstration and development experiments, including advanced dosimeters to characterize the space environment from a 1,200 kilometer low Earth orbit. It is operated by the United States National Reconnaissance Office.
Height 19.21 Meters
Max Stages 5
Mass To GTO 0 kg
Liftoff Thrust 935 kN
Diameter 1.67 Meters
Mass To LEO 580 kg
Liftoff Mass 36 Tonnes
Launch Success 12
Consecutive Success 12
Maiden Flight 2000-01-27
Launch Failures 0