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astronautix.com DSP


Other Designations: Defense Support Program. Class: Early Warning. Nation: United States. Agency: USAF. Manufacturer: TRW.

DSP is the 2nd generation DSP Ballistic Missile Early Warning Satellite. Spacecraft: Spacecraft spin slowly (6 rpm) about the nadir axis to permit scanning of the Earth by the detector system. Zero momentum stabilised using a reaction wheel to counter the spacecraft spin. Body mounted cells and deployable panels generate roughly 680 W. Payload: Payload includes 3.6 m Schmidt telescope with 2000 element IR sensor, nuclear detection sensors.


Specification

Design Life: 3 years (5 year goal). Total Length: 2.9 m. Maximum Diameter: 2.8 m. Total Mass: 1,670 kg.


DSP Chronology


26 June 1976 IMEWS 6 Launch Site: Cape Canaveral . Launch Vehicle: Titan 3C. Mass: 1,670 kg. Perigee: 35,620 km. Apogee: 35,860 km. Inclination: 0.5 deg.
06 February 1977 IMEWS 7 Launch Site: Cape Canaveral . Launch Vehicle: Titan 3C. Mass: 1,670 kg. Perigee: 35,620 km. Apogee: 35,860 km. Inclination: 0.5 deg.
10 June 1979 IMEWS 10 Launch Site: Cape Canaveral . Launch Vehicle: Titan 3C. Mass: 1,670 kg. Perigee: 35,712 km. Apogee: 35,854 km. Inclination: 1.8 deg.
16 March 1981 IMEWS 11 Launch Site: Cape Canaveral . Launch Vehicle: Titan 3C. Mass: 1,670 kg. Perigee: 35,463 km. Apogee: 35,527 km. Inclination: 2.0 deg.
06 March 1982 IMEWS 13 Launch Site: Cape Canaveral . Launch Vehicle: Titan 3C. Mass: 1,670 kg. Perigee: 35,520 km. Apogee: 35,598 km. Inclination: 2.0 deg.
14 April 1984 DSP Launch Site: Cape Canaveral . Launch Vehicle: Titan 34D. Mass: 1,670 kg. Perigee: 35,530 km. Apogee: 35,530 km. Inclination: 1.3 deg.

DSP.


22 December 1984 USA 7 Launch Site: Cape Canaveral . Launch Vehicle: Titan 34D. Mass: 1,670 kg. Perigee: 35,619 km. Apogee: 35,915 km. Inclination: 3.4 deg.

Reserve DSP fitted with Block 14 sensors. Observed Scud launches during Gulf War.


29 November 1987 USA 28 Launch Site: Cape Canaveral . Launch Vehicle: Titan 34D. Mass: 1,670 kg. Perigee: 35,514 km. Apogee: 35,558 km. Inclination: 2.9 deg.

Reserve DSP fitted with Block 14 sensors. Observed Scud launches during Gulf War.


23 February 1997 DSP F18 Launch Site: Cape Canaveral . Launch Vehicle: Titan 4B. Perigee: 35,780 km. Apogee: 35,790 km. Inclination: 0.0 deg.

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