USA-200
| Names | NROL-28 |
|---|---|
| Mission type | SIGINT |
| Operator | United States NRO |
| COSPAR ID | 2008-010A |
| SATCAT no. | 32706 |
| Start of mission | |
| Launch date | 13 March 2008, 10:02 UTC |
| Rocket | Atlas V 411 (AV-006) |
| Launch site | Vandenberg, SLC-3E |
| Contractor | Lockheed Martin Commercial Launch Service |
| Orbital parameters | |
| Reference system | Geocentric orbit |
| Regime | Molniya orbit |
| Perigee altitude | 1,112 km (691 mi) |
| Apogee altitude | 37,580 km (23,350 mi) |
| Inclination | 63.56° |
| Period | 684.33 minutes |
| Instruments | |
| Space-Based Infrared System (SBIRS-HEO 2) Magnetospheric science instrument (TWINS-B) | |
NROL-28 mission patch | |
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USA-200, also known as NRO Launch 28 or NROL-28, is an American signals intelligence satellite, operated by the National Reconnaissance Office. Launched in 2008, it has been identified as the second satellite in a series known as Improved Trumpet, Advanced Trumpet, or Trumpet follow-on; a replacement for the earlier Trumpet series of satellites.