Encyclopedia Astronautica
Atlas E/SGS-2


American orbital launch vehicle. Atlas E + 1 x Star 48 + 1 x Star 48 upper stages.

Gross mass: 125,000 kg (275,000 lb).
Height: 32.10 m (105.30 ft).
Diameter: 3.05 m (10.00 ft).
Thrust: 1,731.00 kN (389,144 lbf).
Apogee: 20,000 km (12,000 mi).
First Launch: 1983.07.14.
Last Launch: 1985.10.09.
Number: 4 .

More... - Chronology...


Associated Countries
Associated Spacecraft
  • GPS Block 1 American navigation satellite. 11 launches, 1978.02.22 (Navstar 1) to 1985.10.09 (USA 10). GPS Block 1 prototype satellites formed the GPS Demonstration system and were followed by the Block 2 operational system. More...

See also
  • Atlas The Atlas rocket, originally developed as America's first ICBM, was the basis for most early American space exploration and was that country's most successful medium-lift commercial launch vehicle. It launched America's first astronaut into orbit; the first generations of spy satellites; the first lunar orbiters and landers; the first probes to Venus, Mars, Mercury, Jupiter, and Saturn; and was America's most successful commercial launcher of communications satellites. Its innovative stage-and-a-half and 'balloon tank' design provided the best dry-mass fraction of any launch vehicle ever built. It was retired in 2004 after 576 launches in a 47-year career. More...

Associated Manufacturers and Agencies
  • Convair American manufacturer of rockets, spacecraft, and rocket engines. Convair, 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...

Associated Launch Sites
  • Vandenberg Vandenberg Air Force Base is located on the Central Coast of California about 240 km northwest of Los Angeles. It is used for launches of unmanned government and commercial satellites into polar orbit and intercontinental ballistic missile test launches toward the Kwajalein Atoll. More...
  • Vandenberg SLC3W Delta, Atlas launch complex. First designated LC1-1 and used to launch Atlas Agena B with Samos payloads. After Samos cancellation, rebuilt in 1963 to support launch of KH-4 Corona spysats atop Thor-Agena. Refurbished in 1973 to accomodate surplus Atlas ICBM's in space launch role. More...

Associated Stages
  • Atlas E/F Lox/Kerosene propellant rocket stage. Loaded/empty mass 117,826/4,926 kg. Thrust 386.30 kN. Vacuum specific impulse 316 seconds. More...
  • Atlas MA-3 Lox/Kerosene propellant rocket stage. Loaded/empty mass 3,174/3,174 kg. Thrust 1,644.96 kN. Vacuum specific impulse 290 seconds. More...
  • PAM-S Solid propellant rocket stage. Loaded/empty mass 2,182/220 kg. Thrust 66.60 kN. Vacuum specific impulse 288 seconds. More...

Atlas E/SGS-2 Chronology


1983 July 14 - . 10:21 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC3W. LV Family: Atlas. Launch Vehicle: Atlas E/SGS-2. LV Configuration: Atlas E/SGS-2 75E.
  • Navstar 8 - . Payload: GPS SVN 8 / OPS 9794. Mass: 770 kg (1,690 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 1. USAF Sat Cat: 14189 . COSPAR: 1983-072A. Apogee: 21,229 km (13,191 mi). Perigee: 20,757 km (12,897 mi). Inclination: 64.2000 deg. Period: 751.10 min. Summary: Global Positioning System..

1984 June 13 - . 11:37 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC3W. LV Family: Atlas. Launch Vehicle: Atlas E/SGS-2. LV Configuration: Atlas E/SGS-2 42E.
  • USA 1 - . Payload: GPS SVN 9. Mass: 770 kg (1,690 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 1. USAF Sat Cat: 15039 . COSPAR: 1984-059A. Apogee: 21,194 km (13,169 mi). Perigee: 20,681 km (12,850 mi). Inclination: 64.2000 deg. Period: 748.80 min. Summary: Global Positioning System..

1984 September 8 - . 21:41 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC3W. LV Family: Atlas. Launch Vehicle: Atlas E/SGS-2. LV Configuration: Atlas E/SGS-2 14E.
  • USA 5 - . Payload: GPS SVN 10. Mass: 770 kg (1,690 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 1. USAF Sat Cat: 15271 . COSPAR: 1984-097A. Apogee: 21,203 km (13,174 mi). Perigee: 20,612 km (12,807 mi). Inclination: 61.9000 deg. Period: 747.60 min. Summary: Global Positioning System..

1985 October 9 - . 02:53 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC3W. LV Family: Atlas. Launch Vehicle: Atlas E/SGS-2. LV Configuration: Atlas E/SGS-2 55E.
  • USA 10 - . Payload: GPS SVN 11. Mass: 770 kg (1,690 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 1. USAF Sat Cat: 16129 . COSPAR: 1985-093A. Apogee: 21,673 km (13,466 mi). Perigee: 20,765 km (12,902 mi). Inclination: 65.0000 deg. Period: 760.40 min. Summary: Global Positioning System..

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