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EIS

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Status: Operational 1992. First Launch: 1992-11-28. Last Launch: 2013-08-28. Number: 7 . Gross mass: 20,000 kg (44,000 lb).

• USA 86 - . Payload: EIS-1. Mass: 19,600 kg (43,200 lb). Nation: USA. Agency: CIA, NRO. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: EIS. Decay Date: 2000-06-05 . USAF Sat Cat: 22251 . COSPAR: 1992-083A. Apogee: 911 km (566 mi). Perigee: 256 km (159 mi). Inclination: 97.70 deg. Period: 96.40 min. Optical reconnaisance satellite built for the US National Reconnaissance Office..

• USA 116 - . Payload: EIS-2. Mass: 26,000 kg (57,000 lb). Nation: USA. Agency: CIA, NRO. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: EIS. USAF Sat Cat: 23728 . COSPAR: 1995-066A. Apogee: 976 km (606 mi). Perigee: 250 km (150 mi). Inclination: 98.70 deg. Optical reconnaisance satellite built for the US National Reconnaissance Office. Instruments said to include a large telescope with visual and near infrared wavelength CCD sensors and the ICMS mapping system..

• USA 129 - . Payload: EIS-3. Mass: 19,600 kg (43,200 lb). Nation: USA. Agency: NRO, USAF. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: EIS. USAF Sat Cat: 24680 . COSPAR: 1996-072A. Apogee: 949 km (589 mi). Perigee: 153 km (95 mi). Inclination: 97.90 deg. Optical reconnaisance satellite built for the US National Reconnaissance Office..

• USA 161 - . Payload: EIS-4. Mass: 16,650 kg (36,700 lb). Nation: USA. Agency: NRO. Manufacturer: Lockheed. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: EIS. USAF Sat Cat: 26934 . COSPAR: 2001-044A. Apogee: 1,050 km (650 mi). Perigee: 150 km (90 mi). Inclination: 97.90 deg.

  Launch delayed from September 25, October1. National Reconnaissance Office payload that was placed into a sun-synchronous orbit. It was speculated that the payload was an Improved Crystal imaging satellite. That would imply an operational orbit of 150 x 1050 km x 97.9 deg orbit. The satellite belonged to the National Reconnaissance Office's fleet of Earth Imaging System (EIS) satellites. A BBC website reported a resolution of 10 cm in the images. (A commonly used name for the EIS satellites was Advanced Keyhole.) The first member of the EIS fleet was USA 144 (1999-028A), launched in May 1999.

• USA 186 - . Payload: EIS-5 / NROL-20. Mass: 20,000 kg (44,000 lb). Nation: USA. Agency: NRO. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: EIS. USAF Sat Cat: 28888 . COSPAR: 2005-042A. Apogee: 1,050 km (650 mi). Perigee: 264 km (164 mi). Inclination: 97.90 deg.

  Delayed from 2003; February 2004; and June 30, July 10, September 9, 2005. Last launch of the Titan series put a classified National Reconnaisance Office satellite into polar orbit. Its orbital parameters, as determined by amateur observors, suggested it was an Improved Crystal electronic imaging reconnaissace satellite, replacing USA 129, which was launched in 1996.

• USA 224 - . Payload: EIS-6 / NROL-49. Mass: 17,000 kg (37,000 lb). Nation: USA. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: EIS. USAF Sat Cat: 37348 . COSPAR: 2011-002A. National Reconnaissance Office satellite placed into 252 km x 1023 km x 97.9 deg polar orbit, consistent with reports that it is was an Improved CRYSTAL type (KH-11 derivative) imaging reconnaissance satellite..

• USA 245 - . Payload: EIS- 7 / NROL-65. Mass: 15,000 kg (33,000 lb). Nation: USA. Class: Surveillance. Type: Surveillance satellite. Spacecraft: EIS. USAF Sat Cat: 39232 . COSPAR: 2013-043A. Apogee: 1,002 km (622 mi). Perigee: 259 km (160 mi). Inclination: 97.90 deg. Secret payload for the National Reconnaissance Office; thought to be an imaging spy satellite of the EIS/Enhanced CRYSTAL type..