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Canyon
American military signals intelligence satellite. The first large US signals intelligence satellite. ELINT satellite built by Lockheed for NRO, USA. Launched 1968 - 1977.

Status: Operational 1968. First Launch: 1968-08-06. Last Launch: 1977-05-23. Number: 7 . Gross mass: 700 kg (1,540 lb).

Placed into near-geosynchronous orbits. They were misidentified by some analysts as missile warning satellites.


More at: Canyon.

Family: Geosynchronous orbit, Military naval signals reconnsat, SIGINT, Surveillance. Country: USA. Launch Vehicles: Atlas, Atlas SLV-3A Agena D. Launch Sites: Cape Canaveral, Cape Canaveral LC13. Agency: USAF. Bibliography: 126, 172, 2, 278, 6, 6403, 12163.

1968 August 6 - . 11:16 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC13. LV Family: Atlas. Launch Vehicle: Atlas SLV-3A Agena D.
  • Canyon 1 - . Payload: Canyon 1 / Agena D / OPS 2222. Mass: 700 kg (1,540 lb). Nation: USA. Agency: NRO, USAF. Class: Surveillance. Type: Naval signals intelligence satellite. Spacecraft: Canyon. USAF Sat Cat: 3334 . COSPAR: 1968-063A. Apogee: 39,860 km (24,760 mi). Perigee: 31,680 km (19,680 mi). Inclination: 9.9000 deg. Period: 1,436.00 min.

    The first "stretched" Atlas SLV-3A/ Agena D was launched from the Eastern Test Range. The "stretched" Atlas had an additional 117-inch tank section to provide more fuel, a longer burn time, and increased payload capability. First launch in a communications intelligence program operated by the USAF within the National Reconnaissance Office, on behalf of the National Security Agency. The first generation series, CANYON, was based on the Agena vehicle. The Agena D remained attached to the spacecraft. Positioned in geosynchronous orbit over the Indian Ocean. Last known longitude (30 December 1968) 98.50 deg W drifting at 0.166 deg E per day.


1969 April 13 - . 02:24 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC13. LV Family: Atlas. Launch Vehicle: Atlas SLV-3A Agena D.
  • Canyon 2 - . Payload: Canyon 2 / Agena D / OPS 3148. Mass: 700 kg (1,540 lb). Nation: USA. Agency: USAF. Class: Surveillance. Type: Naval signals intelligence satellite. Spacecraft: Canyon. USAF Sat Cat: 3889 . COSPAR: 1969-036A. Apogee: 39,270 km (24,400 mi). Perigee: 32,670 km (20,300 mi). Inclination: 9.9000 deg. Period: 1,445.00 min. Positioned in geosynchronous orbit over the Indian Ocean. Last known longitude (31 December 1969) 99.24 deg W drifting at 2.246 deg W per day..

1970 September 1 - . 01:00 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC13. LV Family: Atlas. Launch Vehicle: Atlas SLV-3A Agena D.
  • Canyon 3 - . Payload: Canyon 3 / Agena D / OPS 7329. Mass: 700 kg (1,540 lb). Nation: USA. Agency: USAF. Class: Surveillance. Type: Naval signals intelligence satellite. Spacecraft: Canyon. USAF Sat Cat: 4510 . COSPAR: 1970-069A. Apogee: 39,855 km (24,764 mi). Perigee: 31,947 km (19,850 mi). Inclination: 10.3000 deg. Period: 1,441.90 min. Positioned in geosynchronous orbit over the Indian Ocean. Last known longitude (31 December 1970) 99.01 deg W drifting at 1.490 deg W per day..

1971 December 4 - . 22:30 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC13. LV Family: Atlas. Launch Vehicle: Atlas SLV-3A Agena D. FAILURE: First stage failure.. Failed Stage: 1.
  • AFP-827 / Canyon 4 - . Payload: Canyon 4 / Agena D. Mass: 700 kg (1,540 lb). Nation: USA. Agency: USAF. Class: Surveillance. Type: Naval signals intelligence satellite. Spacecraft: Canyon. Decay Date: 1971-12-04 .

1972 December 20 - . 22:20 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC13. LV Family: Atlas. Launch Vehicle: Atlas SLV-3A Agena D.
  • Canyon 5 - . Payload: Canyon Improved / OPS 9390. Mass: 700 kg (1,540 lb). Nation: USA. Agency: NRO, USAF. Class: Surveillance. Type: Naval signals intelligence satellite. Spacecraft: Canyon. USAF Sat Cat: 6317 . COSPAR: 1972-101A. Apogee: 40,728 km (25,307 mi). Perigee: 31,012 km (19,269 mi). Inclination: 9.7000 deg. Period: 1,440.40 min. First launch of improved ELINT satellite. In comparison to earlier Canyon ELINT satellites, Improved Canyon had a similar but heavier payload which separated from the Agena D final stage..

1975 June 18 - . 09:00 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC13. LV Family: Atlas. Launch Vehicle: Atlas SLV-3A Agena D.
  • Canyon 6 - . Payload: Canyon Improved / OPS 4966. Mass: 700 kg (1,540 lb). Nation: USA. Agency: NRO, USAF. Class: Surveillance. Type: Naval signals intelligence satellite. Spacecraft: Canyon. USAF Sat Cat: 7963 . COSPAR: 1975-055A. Apogee: 40,800 km (25,300 mi). Perigee: 30,200 km (18,700 mi). Inclination: 9.0000 deg. Period: 1,422.00 min.

1977 May 23 - . 18:13 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC13. LV Family: Atlas. Launch Vehicle: Atlas SLV-3A Agena D.
  • Canyon 7 - . Payload: Canyon Improved / OPS 9751. Mass: 700 kg (1,540 lb). Nation: USA. Agency: NRO, USAF. Class: Surveillance. Type: Naval signals intelligence satellite. Spacecraft: Canyon. USAF Sat Cat: 10016 . COSPAR: 1977-038A. Apogee: 35,855 km (22,279 mi). Perigee: 35,679 km (22,169 mi). Inclination: 0.2000 deg. Period: 1,435.10 min.


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