Mission type | Technology |
---|---|
Operator | NRO |
COSPAR ID | 2011-006A |
SATCAT no. | 37364 |
Spacecraft properties | |
Launch mass | 350 kilograms (770 lb) [1] |
Start of mission | |
Launch date | 6 February 2011, 12:26 UTC [2] |
Rocket | Minotaur I SLV-10 |
Launch site | Vandenberg SLC-8 |
Contractor | Orbital Sciences |
Orbital parameters | |
Reference system | Geocentric |
Regime | Low Earth |
Perigee altitude | 1,202 kilometers (747 mi) |
Apogee altitude | 1,230 kilometers (760 mi) |
Inclination | 90 degrees |
Period | 109.76 minutes |
Epoch | 6 February 2011 [3] |
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. [4] It is operated by the United States National Reconnaissance Office. [5]
Rapid Pathfinder was developed for less than US$20 million over a period of less than two years. Its dimensions are 0.5 m times 0.5 m times 0.5 m, and its mass including payload is 235 kg. [4]
A Minotaur I carrier rocket was used to launch USA-225, flying from Space Launch Complex 8 of the Vandenberg Air Force Base. The launch of was originally scheduled for March 2011; however, it was subsequently moved forwards to 5 February. [6] During the attempt to launch on 5 February 2011, a transmitter malfunctioned, and the launch attempt was scrubbed. Another attempt was scheduled for the next day. At 12:26 on 6 February 2011, the Minotaur lifted off, carrying USA-225 into orbit. [7] The launch was conducted by Orbital Sciences Corporation.
For launch, the RPP satellite was given the designation NRO Launch 66, or NROL-66. Upon reaching orbit it was named USA-225 in accordance with the usual naming system for American military spacecraft. The satellite received the International Designator 2011-006A, and the Satellite Catalog Number 37364. [8]
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