Encyclopedia Astronautica
SDI


American military strategic defense satellite. 18 launches, 1986.09.05 (USA 19) to 1989.03.24 (USA 36). SDIO sensor tests.

Gross mass: 6,000 kg (13,200 lb).
First Launch: 1986.09.05.
Last Launch: 1989.03.24.
Number: 18 .

More... - Chronology...


Associated Countries
See also
  • Delta The Delta launch vehicle was America's longest-lived, most reliable, and lowest-cost space launch vehicle. Development began in 1955 and it continued in service in the 21st Century despite numerous candidate replacements. More...

Associated Launch Vehicles
  • Delta American orbital launch vehicle. The Delta launch vehicle was America's longest-lived, most reliable, and lowest-cost space launch vehicle. Delta began as Thor, a crash December 1955 program to produce an intermediate range ballistic missile using existing components, which flew thirteen months after go-ahead. Fifteen months after that, a space launch version flew, using an existing upper stage. The addition of solid rocket boosters allowed the Thor core and Able/Delta upper stages to be stretched. Costs were kept down by using first and second-stage rocket engines surplus to the Apollo program in the 1970's. Continuous introduction of new 'existing' technology over the years resulted in an incredible evolution - the payload into a geosynchronous transfer orbit increasing from 68 kg in 1962 to 3810 kg by 2002. Delta survived innumerable attempts to kill the program and replace it with 'more rationale' alternatives. By 2008 nearly 1,000 boosters had flown over a fifty-year career, and cancellation was again announced. More...
  • Delta 3910 American orbital launch vehicle. Three stage vehicle consisting of 9 x Castor 4 + 1 x ELT Thor/RS-27 + 1 x Delta P /TR-201 More...
  • Delta 3920 American orbital launch vehicle. Three stage vehicle consisting of 9 x Castor 4A + 1 x ELT Thor/RS-27 + 1 x Delta K More...
  • Delta 3920-8 American orbital launch vehicle. Three stage vehicle consisting of 9 x Castor 4A + 1 x ELT Thor/RS-27 + 1 x Delta K More...
  • Delta 3000 American orbital launch vehicle. The Delta 3000 series upgraded the boosters to Castor 4 solid propellant strap-ons, while retaining the Extended Long Tank core with RS-27 engine. The 3910 series used the TRW Lunar Module engine in the second stage, while the 3920 series reintroduced the Aerojet AJ110 Delta engine. More...

Associated Manufacturers and Agencies
  • USAF American agency overseeing development of rockets and spacecraft. United States Air Force, USA. More...

Bibliography
  • McDowell, Jonathan, Jonathan's Space Home Page (launch records), Harvard University, 1997-present. Web Address when accessed: here.
  • JPL Mission and Spacecraft Library, Jet Propulsion Laboratory, 1997. Web Address when accessed: here.
  • McDowell, Jonathan, Launch Log, October 1998. Web Address when accessed: here.

Associated Launch Sites
  • Cape Canaveral America's largest launch center, used for all manned launches. Today only six of the 40 launch complexes built here remain in use. Located at or near Cape Canaveral are the Kennedy Space Center on Merritt Island, used by NASA for Saturn V and Space Shuttle launches; Patrick AFB on Cape Canaveral itself, operated the US Department of Defense and handling most other launches; the commercial Spaceport Florida; the air-launched launch vehicle and missile Drop Zone off Mayport, Florida, located at 29.00 N 79.00 W, and an offshore submarine-launched ballistic missile launch area. All of these take advantage of the extensive down-range tracking facilities that once extended from the Cape, through the Caribbean, South Atlantic, and to South Africa and the Indian Ocean. More...
  • Cape Canaveral LC17B Delta launch complex. Part of a dual launch pad complex built for the Thor ballistic missile program in 1956. Upgraded over the decades for use with Thor, Delta, Delta II, and Delta III launch vehicles, it remained in use for over half a century. More...

SDI Chronology


1986 September 5 - . 15:08 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17B. LV Family: Delta. Launch Vehicle: Delta 3920. LV Configuration: Delta 3920 D180.
  • USA 19 - . Payload: Delta 180 / Payload Adapter System. Nation: USA. Agency: SDIO. Class: Military. Type: Strategic defense satellite. Spacecraft: SDI. Decay Date: 1986-09-28 . USAF Sat Cat: 16937 . COSPAR: 1986-069A. Apogee: 748 km (464 mi). Perigee: 213 km (132 mi). Inclination: 39.1000 deg. Period: 94.20 min. Summary: SDIO sensor tests. Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C). .
  • Delta 180 Sensor Module - . Payload: DM 43 Sensor Module. Nation: USA. Agency: SDIO. Spacecraft: SDI. Decay Date: 1986-11-25 . USAF Sat Cat: 16938 . COSPAR: 1986-069B. Apogee: 539 km (334 mi). Perigee: 215 km (133 mi). Inclination: 22.7000 deg. Period: 92.09 min.

1988 February 8 - . 22:08 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17B. LV Family: Delta. Launch Vehicle: Delta 3910. LV Configuration: Delta 3910 D181.
  • USA 30 - . Payload: Delta 181 Canister Cluster. Mass: 6,000 kg (13,200 lb). Nation: USA. Agency: SDIO. Class: Military. Type: Strategic defense satellite. Spacecraft: SDI. Decay Date: 1988-03-01 . USAF Sat Cat: 18847 . COSPAR: 1988-008A. Apogee: 342 km (212 mi). Perigee: 225 km (139 mi). Inclination: 28.6000 deg. Period: 90.20 min. Summary: Military tracking exercise; released subsatellites. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B). .
  • Delta 181 Subsatellite 5 - . Payload: Group 1 Test Object. Nation: USA. Agency: NASA. Spacecraft: SDI. COSPAR: 1988-008xx.
  • Delta 181 Subsatellite 4 - . Payload: Group 1 Test Object. Nation: USA. Agency: NASA. Spacecraft: SDI. COSPAR: 1988-008xx.
  • Delta 181 Subsatellite 11 - . Payload: Group 2 Test Object. Nation: USA. Agency: NASA. Spacecraft: SDI. Decay Date: 1988-03-01 . USAF Sat Cat: 18847 . COSPAR: 1988-008xx. Apogee: 195 km (121 mi). Perigee: 168 km (104 mi). Inclination: 28.6000 deg. Period: 88.10 min.
  • Delta 181 Subsatellite 10 - . Payload: Group 2 Test Object. Nation: USA. Agency: NASA. Spacecraft: SDI. Decay Date: 1988-03-01 . USAF Sat Cat: 18847 . COSPAR: 1988-008xx. Apogee: 195 km (121 mi). Perigee: 168 km (104 mi). Inclination: 28.6000 deg. Period: 88.10 min.
  • Delta 181 Subsatellite 9 - . Payload: Group 2 Test Object. Nation: USA. Agency: NASA. Spacecraft: SDI. COSPAR: 1988-008xx.
  • Delta 181 Subsatellite 8 - . Payload: Group 2 Test Object. Nation: USA. Agency: NASA. Spacecraft: SDI. COSPAR: 1988-008xx.
  • Delta 181 Subsatellite 7 - . Payload: Group 2 Test Object. Nation: USA. Agency: NASA. Spacecraft: SDI. COSPAR: 1988-008xx.
  • Solid Motor Subsatellite - . Payload: Group 2 Test Object. Nation: USA. Agency: NASA. Spacecraft: SDI. COSPAR: 1988-008xx.
  • Delta 181 Subsatellite 3 - . Payload: Group 1 Test Object. Nation: USA. Agency: NASA. Spacecraft: SDI. COSPAR: 1988-008xx.
  • Delta 181 Subsatellite 2 - . Payload: Group 1 Test Object. Nation: USA. Agency: NASA. Spacecraft: SDI. COSPAR: 1988-008xx.
  • Delta 181 Subsatellite 1 - . Payload: Group 1 Test Object. Nation: USA. Agency: NASA. Spacecraft: SDI. Decay Date: 1988-03-01 . USAF Sat Cat: 18847 . COSPAR: 1988-008xx. Apogee: 195 km (121 mi). Perigee: 168 km (104 mi). Inclination: 28.6000 deg. Period: 88.10 min.
  • SPX - . Nation: USA. Agency: NASA. Spacecraft: SDI. COSPAR: 1988-008xx.
  • Delta 181 Sensor Module - . Payload: Thrusted Vector Sensor Mo. Nation: USA. Agency: SDIO. Spacecraft: SDI. Decay Date: 1988-04-02 . USAF Sat Cat: 18848 . COSPAR: 1988-008B. Apogee: 314 km (195 mi). Perigee: 287 km (178 mi). Inclination: 30.7000 deg. Period: 90.53 min.
  • Sensor Cal Reference Subsat - . Payload: Group 1 Cal Object. Nation: USA. Agency: NASA. Spacecraft: SDI. COSPAR: 1988-008xx.

1989 March 24 - . 21:50 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17B. LV Family: Delta. Launch Vehicle: Delta 3920-8. LV Configuration: Delta 3920-8 D183.
  • USA 36 - . Payload: Delta Star. Nation: USA. Agency: SDIO. Class: Military. Type: Strategic defense satellite. Spacecraft: SDI. Decay Date: 1992-06-23 . USAF Sat Cat: 19911 . COSPAR: 1989-026A. Apogee: 312 km (193 mi). Perigee: 307 km (190 mi). Inclination: 47.7000 deg. Period: 90.70 min. Summary: Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C). .

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