NROL-66 (RPP) (USA-225)Minotaur I Orbital Sciences Corporation Launch Status Success Sun ยท Feb 6th, 2011 7:26 AM EST Mission NROL-66 (RPP) (USA-225) Type: Government/Top Secret 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. Location Space Launch Complex 8 Vandenberg AFB, CA, USA 83 launches have been at this location. Rocket Minotaur I Length: 19.21 meters Diameter: 1.67 meters First Launched: January 27, 2000 The Minotaur I launch system is derived from converted Minuteman II ICBMs and is used to launch small satellites for the US Government. The first and second stages, taken directly from decommissioned Minuteman missiles, are mated to the Orion third and fourth stages taken from the Pegasus XL air-launched rocket family. An optional hydrazine-powered fifth stage called HAPS can be used.The Minotaur I launch system is derived from converted Minuteman II ICBMs and is used to launch small satellites for the US Government. The first and second stages, taken directly from decommissioned Minuteman missiles, are mated to the Orion third and fourth stages taken from the Pegasus XL air-launched rocket family. An optional hydrazine-powered fifth stage called HAPS can be used. The Minotaur I rocket has been launched a total of 3 times with 3 successful and 0 failed launches. Agency Orbital Sciences Corporation Type: Commercial Abbreviation: OSC Administration: Founded: Launchers: Spacecraft: Country: USA View Rocket Launch Schedule