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Explorer 51 Atmosphere Explorer-C Upper-Atmosphere Research Spacecraft Family

Explorer 51, also known as Atmosphere Explorer-C or AE-C, was a NASA upper-atmosphere research satellite launched on December 16, 1973. Its suite of 14 instruments measured thermospheric neutral composition, density, temperature, energy transfer, ionospheric chemistry, and photochemical processes over altitudes from roughly 150 to 4,000 kilometers, with merged science data through December 1978.

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Identity

Aliases
Explorer 51Explorer LIAE-CAtmosphere Explorer-CAtmosphere Explorer C1973 101AExplorer 51 spacecraft
Family Name
Explorer 51
Full Name
Explorer 51 Atmosphere Explorer-C Upper-Atmosphere Research Spacecraft Family
Roles
orbiterobservatoryresearch
Status
retired
Type
spacecraft

Details

Description
Explorer 51, also known as Atmosphere Explorer-C or AE-C, was a NASA upper-atmosphere research satellite launched on December 16, 1973. Its suite of 14 instruments measured thermospheric neutral composition, density, temperature, energy transfer, ionospheric chemistry, and photochemical processes over altitudes from roughly 150 to 4,000 kilometers, with merged science data through December 1978.
First Flight Year
1,973
Last Flight Year
1,978

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Creation Time
August 14, 2026 at 08:04:46 UTC
Updated Time
August 14, 2026 at 08:04:46 UTC