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S-56
American earth atmosphere satellite. 12 foot diameter. balloon; atmospheric density studies.

Status: Operational 1960. First Launch: 1960-12-04. Last Launch: 1961-02-16. Number: 2 . Gross mass: 6.50 kg (14.30 lb).



Family: Atmosphere sat, Earth. Country: USA. Launch Vehicles: Scout, Scout X-1. Projects: Explorer. Launch Sites: Wallops Island, Wallops Island LA3. Agency: USAF. Bibliography: 126, 2, 3713, 3718, 6.

1960 December 4 - . 21:14 GMT - . Launch Site: Wallops Island. Launch Complex: Wallops Island LA3. LV Family: Scout. Launch Vehicle: Scout X-1. FAILURE: Second stage malfunction.. Failed Stage: 2.
  • Explorer (9) S 56 - . Payload: S-56. Mass: 6.00 kg (13.20 lb). Nation: USA. Agency: NASA. Program: Explorer. Class: Earth. Type: Atmosphere satellite. Spacecraft: S-56. Decay Date: 1960-12-04 .

1961 February 16 - . 13:05 GMT - . Launch Site: Wallops Island. Launch Complex: Wallops Island LA3. LV Family: Scout. Launch Vehicle: Scout X-1.
  • Explorer 9 - . Payload: S-56A. Mass: 7.00 kg (15.40 lb). Nation: USA. Agency: USAF. Program: Explorer. Class: Earth. Type: Atmosphere satellite. Spacecraft: S-56. Decay Date: 1964-04-09 . USAF Sat Cat: 81 . COSPAR: 1961-Delta-1. Apogee: 2,433 km (1,511 mi). Perigee: 757 km (470 mi). Inclination: 38.8000 deg. Period: 118.00 min. 12 foot dia. balloon; atmospheric density studies. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B). .


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