SDS

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SDS

Class: Communications. Type: Military. Nation: USA. Agency: U.S. Air Force.

SDS satellites, put into Molniya-type orbits, provide data relay services for optical reconnaisance and other military spacecraft.

Specification

Total Mass: 700 kg.

SDS Chronology

02 June 1976 SDS no. 1 Launch Site: Vandenberg . Launch Vehicle: Titan 34B. Mass: 700 kg. Perigee: 380 km. Apogee: 39,315 km. Inclination: 63.3 deg.

06 August 1976 SDS no. 2 Launch Site: Vandenberg . Launch Vehicle: Titan 34B. Mass: 700 kg. Perigee: 380 km. Apogee: 39,315 km. Inclination: 63.3 deg.

Satellite Data Systems 2.

05 August 1978 SDS no. 3 Launch Site: Vandenberg . Launch Vehicle: Titan 34B. Mass: 700 kg. Perigee: 315 km. Apogee: 39,053 km. Inclination: 62.5 deg.

13 December 1980 SDS no. 4 Launch Site: Vandenberg . Launch Vehicle: Titan 34B. Mass: 700 kg. Perigee: 250 km. Apogee: 39,130 km. Inclination: 63.8 deg.

28 August 1984 USA 4 Launch Site: Vandenberg . Launch Vehicle: Titan 34B. Mass: 700 kg. Perigee: 380 km. Apogee: 39,975 km. Inclination: 63.3 deg.

Satellite Data Systems 2.

06 February 1985 USA 9 Launch Site: Vandenberg . Launch Vehicle: Titan 34B. Mass: 700 kg. Perigee: 400 km. Apogee: 39,775 km. Inclination: 63.0 deg.

Satellite Data Systems 2.

12 February 1987 USA 21 Launch Site: Vandenberg . Launch Vehicle: Titan 34B. Mass: 700 kg. Perigee: 610 km. Apogee: 39,750 km. Inclination: 63.4 deg.

Bibliography:

2 - McDowell, Jonathan, The United Nations Registry of Space Objects, Harvard University, 1997. HTML when accessed: http://hea-www.harvard.edu/QEDT/jcm/space/un/un.html
6 - JPL Mission and Spacecraft Library, Jet Propulsion Laboratory, 1997. HTML when accessed: http://msl.jpl.nasa.gov/home.html
279 - McDowell, Jonathan, Launch Log, October 1998. HTML when accessed: http://hea-www.harvard.edu/~jcm/space/log/launch.html

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Last update 12 March 2001.
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© Mark Wade, 2001 .