Home - Search - Browse - Alphabetic Index: 0- 1- 2- 3- 4- 5- 6- 7- 8- 9
A- B- C- D- E- F- G- H- I- J- K- L- M- N- O- P- Q- R- S- T- U- V- W- X- Y- Z
Jumpseat
American military signals intelligence satellite. Jumpseat signals intelligence satellites were launched by Titan 3B or 34B into highly elliptic Molniya-type orbits. ELINT satellite built by Hughes for USAF, USA. Launched 1971 - 1983. Used HS-318 bus.

Status: Operational 1971. First Launch: 1971-03-21. Last Launch: 1983-07-31. Number: 7 . Gross mass: 700 kg (1,540 lb).

These orbits were very similar to those of SDS classified communications/data relay satellites, and identification of a launch in either series as SDS or Jumpseat may differ from analyst to analyst.

Jumpseat satellites were reportedly about 2 m x 2 m x 4 m in dimension, with two large solar wings and a large primary parabolic antenna. In their elliptical orbits they would move very slowly over the northern hemisphere for most of their orbital period, allowing interception of microwave line-of-sight communications beams. Since they would move slowly through the beams during their orbit, a constellation of such satellites was required to monitor Soviet communications throughout the day. What could be intercepted at any particular time of day would depend on which satellites were in a position to monitor which beams. The satellites also probably integrated ELINT and other SIGINT functions and intercepted up- or down-links from Soviet Molniya strategic communications satellites. Receiving stations were established in Pine Gap, near Alice Springs, Australia; Bad Aibling, Germany, Menwith Hill, Yorkshire, England; and Misawa, Japan. Jumpseat and other US COMINT satellites became less important during the 1980's, as the Soviet Union moved to replace interceptable radio communication links with conventional or fiber-optic cables.


More at: Jumpseat.

Family: Military naval signals reconnsat, Molniya orbit, SIGINT, Surveillance. Country: USA. Launch Vehicles: Titan, Titan 33B, Titan 34B. Launch Sites: Vandenberg, Vandenberg SLC4W. Agency: USAF. Bibliography: 2, 279, 6, 6610, 12706.

1971 March 21 - . 03:45 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC4W. LV Family: Titan. Launch Vehicle: Titan 33B.
  • Jumpseat 1 - . Mass: 700 kg (1,540 lb). Nation: USA. Agency: NRO, USAF. Class: Surveillance. Type: Naval signals intelligence satellite. Spacecraft: Jumpseat. USAF Sat Cat: 5053 . COSPAR: 1971-021A. Apogee: 33,800 km (21,000 mi). Perigee: 390 km (240 mi). Inclination: 63.2000 deg. Period: 596.70 min.

1972 February 16 - . 09:59 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC4W. LV Family: Titan. Launch Vehicle: Titan 33B. FAILURE: Failure.
  • Jumpseat 2 - . Payload: OPS 1844. Mass: 700 kg (1,540 lb). Nation: USA. Agency: USAF. Class: Surveillance. Type: Naval signals intelligence satellite. Spacecraft: Jumpseat.

1973 August 21 - . 16:07 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC4W. LV Family: Titan. Launch Vehicle: Titan 33B.
  • Jumpseat 3 - . Mass: 700 kg (1,540 lb). Nation: USA. Agency: NRO, USAF. Class: Surveillance. Type: Naval signals intelligence satellite. Spacecraft: Jumpseat. USAF Sat Cat: 6791 . COSPAR: 1973-056A. Apogee: 39,296 km (24,417 mi). Perigee: 460 km (280 mi). Inclination: 63.3000 deg. Period: 705.70 min.

1975 March 10 - . 04:41 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC4W. LV Family: Titan. Launch Vehicle: Titan 34B.
  • Jumpseat 4 - . Mass: 700 kg (1,540 lb). Nation: USA. Agency: NRO, USAF. Class: Surveillance. Type: Naval signals intelligence satellite. Spacecraft: Jumpseat. USAF Sat Cat: 7687 . COSPAR: 1975-017A. Apogee: 39,337 km (24,442 mi). Perigee: 295 km (183 mi). Inclination: 63.5000 deg. Period: 702.00 min.

1978 February 25 - . 05:00 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC4W. LV Family: Titan. Launch Vehicle: Titan 34B.
  • Jumpseat 5 - . Mass: 700 kg (1,540 lb). Nation: USA. Agency: NRO, USAF. Class: Surveillance. Type: Naval signals intelligence satellite. Spacecraft: Jumpseat. USAF Sat Cat: 10688 . COSPAR: 1978-021A. Apogee: 39,377 km (24,467 mi). Perigee: 311 km (193 mi). Inclination: 63.2000 deg. Period: 703.70 min. Or Quasar..

1981 April 24 - . 21:32 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC4W. LV Family: Titan. Launch Vehicle: Titan 34B.
  • Jumpseat 6 - . Mass: 700 kg (1,540 lb). Nation: USA. Agency: NRO, USAF. Class: Surveillance. Type: Naval signals intelligence satellite. Spacecraft: Jumpseat. USAF Sat Cat: 12418 . COSPAR: 1981-038A. Apogee: 708 km (439 mi). Perigee: 188 km (116 mi). Inclination: 62.7000 deg. Period: 93.00 min. SDS 4 not deployed..

1983 July 31 - . 15:41 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC4W. LV Family: Titan. Launch Vehicle: Titan 34B.
  • Jumpseat 7 - . Mass: 700 kg (1,540 lb). Nation: USA. Agency: NRO, USAF. Class: Surveillance. Type: Naval signals intelligence satellite. Spacecraft: Jumpseat. USAF Sat Cat: 14237 . COSPAR: 1983-078A. Apogee: 39,321 km (24,432 mi). Perigee: 1,028 km (638 mi). Inclination: 63.4000 deg. Period: 717.10 min. Or Quasar.


Home - Search - Browse - Alphabetic Index: 0- 1- 2- 3- 4- 5- 6- 7- 8- 9
A- B- C- D- E- F- G- H- I- J- K- L- M- N- O- P- Q- R- S- T- U- V- W- X- Y- Z
© 1997-2017 Mark Wade - Contact
© / Conditions for Use