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Explorer 15

Explorer 15 was NASA’s spin-stabilized energetic-particle satellite launched on October 27, 1962 to study the artificial radiation belt created by the Starfish high-altitude nuclear test and the surrounding trapped-particle environment.

Explorer 15
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Identity

Aliases
Explorer XVExplorer 151962 BETA LAMBDA 1EPE-C346/D014
Name
Explorer 15
Status
completed

Details

Astronauts
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Description
Explorer 15 was NASA’s spin-stabilized energetic-particle satellite launched on October 27, 1962 to study the artificial radiation belt created by the Starfish high-altitude nuclear test and the surrounding trapped-particle environment.
Destination
Highly elliptical geocentric Earth orbit at approximately 315 km perigee and 17,600 km apogee (5-hour period)
End Date
1963-01-30
Outcome
Using particle detectors and a fluxgate magnetometer, Explorer 15 mapped the artificial radiation belt’s extent, composition, and decay and produced detailed ion and electron measurements before its final usable data in January 1963.
Programs
Start Date
1962-10-27
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Creation Time
August 14, 2026 at 19:43:45 UTC
Updated Time
August 23, 2026 at 01:50:23 UTC

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