| Auto: | all |
| ORS-1 | |
| Mission Type: | Imaging |
| Operator: | US DoD |
| Cospar Id: | 2011-029A |
| Satcat: | 37728 |
| Spacecraft Bus: | ATK satellite bus |
| Manufacturer: | Goodrich Corporation[1] |
| Launch Mass: | 434kg (957lb)[2] |
| Launch Date: | UTC[3] |
| Launch Site: | Mid-Atlantic Regional Spaceport LP-0B |
| Launch Contractor: | Orbital Sciences |
| Orbit Epoch: | January 13, 2015, 04:45:04 UTC[4] |
| Orbit Reference: | Geocentric |
| Orbit Regime: | Low Earth |
| Orbit Periapsis: | 423km (263miles) |
| Orbit Apoapsis: | 427km (265miles) |
| Orbit Inclination: | 40.07 degrees |
| Orbit Period: | 92.93 minutes |
| Apsis: | gee |
USA-231,[5] or ORS-1 (Operationally Responsive Space-1) is an American reconnaissance satellite which was launched in 2011 from NASA’s Wallops Flight Facility, Virginia by a Minotaur I launch vehicle.[3] It is the first operational satellite of the Operationally Responsive Space Office. It is equipped with a SYERS 2A sensor.[6]
ORS-1 satellite is designed to provide orbital space imagery of Southwest Asia and to enhance battlespace awareness to operational field commanders. The ORS-1 will undergo a 30-day trial and adjustment check before the ORS Office turns over it operations to USAF's 1st Space Operations Squadron at Schriever AFB, Colorado.[3]
SYERS 2 is an optical and infrared camera with a 40 cm aperture and a field of view larger than 2 degrees. It uses Time Delay and Integration CCD sensors to compensate for ground motion, resulting in a resolution of 1m (NIIRS 4) from a nominal 300 km orbit.[7] SYERS 2 is supplied by the Goodrich Corporation.
SYERS is also carried by the Lockheed U-2 reconnaissance aircraft.[8]