Encyclopedia Astronautica
SEDS


American tether technology satellite. 4 launches, 1993.03.30 (SEDS 1) to 1994.03.10 (SEDS 2 Deployer).

AKA: Small Expendable-tether Deployer System..
Gross mass: 25 kg (55 lb).
First Launch: 1993.03.30.
Last Launch: 1994.03.10.
Number: 4 .

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 2 7000 American orbital launch vehicle. The Delta 7000 series used GEM-40 strap-ons with the Extra Extended Long Tank core, further upgraded with the RS-27A engine. More...
  • Delta 7925 American orbital launch vehicle. Four stage vehicle consisting of 9 x GEM-40 + 1 x EELT Thor/RS-27A + 1 x Delta K + 1 x Star 48B More...

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

Associated Programs
  • Navstar The Navstar GPS (Global Positioning System) program was a joint service effort directed by the United States Department of Defence. Navstar GPS is a space-based radio-positioning system nominally consisting of a 24-satellite constellation that provides navigation and timing information to military and civilian users worldwide. In addition to the satellites, the system consists of a worldwide satellite control network and GPS receiver units that acquire the satellite's signals and translate them into position information. Originally envisioned as primarily a military system, GPS was found to have a wide variety of civilian applications, many of them never conceived by the original system's designers. 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 LC17A Delta launch complex. Part of a dual launch pad complex built for the Thor ballistic missile program in 1956. Pad 17A supported Thor, Delta, and Delta II launches into the 21st Century. More...

SEDS Chronology


1993 March 30 - . 03:09 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. LV Family: Delta. Launch Vehicle: Delta 7925. LV Configuration: Delta 7925 D219.
  • SEDS 1 - . Payload: SEDS 1 End Mass/Tether. Mass: 25 kg (55 lb). Nation: USA. Agency: NASA Huntsville. Class: Technology. Type: Tether technology satellite. Spacecraft: SEDS. Decay Date: 1993-03-30 . USAF Sat Cat: 22582 . COSPAR: 1993-017B. Apogee: 719 km (446 mi). Perigee: 183 km (113 mi). Inclination: 36.0000 deg. Period: 93.62 min. Summary: Small Expendable-tether Deployer System. .
  • SEDS 1 Deployer - . Payload: SEDS 1 Deployer. Nation: USA. Agency: MDAC. Program: Navstar. Spacecraft: SEDS. Decay Date: 1999-05-05 . USAF Sat Cat: 22583 . COSPAR: 1993-017C. Apogee: 1,292 km (802 mi). Perigee: 305 km (189 mi). Inclination: 36.1000 deg. Period: 100.84 min.

1994 March 10 - . 03:40 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. LV Family: Delta. Launch Vehicle: Delta 7925. LV Configuration: Delta 7925 D226.
  • SEDS 2 Deployer - . Payload: SEDS 2 Deployer. Nation: USA. Agency: MDAC. Program: Navstar. Spacecraft: SEDS. Decay Date: 1994-05-08 . USAF Sat Cat: 23028 . COSPAR: 1994-016B. Apogee: 341 km (211 mi). Perigee: 340 km (210 mi). Inclination: 32.3000 deg. Period: 91.34 min.
  • SEDS 2 - . Payload: SEDS 2 End Mass. Nation: USA. Agency: MDSSC. Program: Navstar. Spacecraft: SEDS. COSPAR: 1994-016xx.

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