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Van Allen Probes

NASA’s twin Van Allen Probes, originally called the Radiation Belt Storm Probes, measured the structure and dynamics of Earth’s radiation belts and the behavior of energetic particles under changing solar conditions.

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Identity

Aliases
Radiation Belt Storm ProbesRBSPRBSP-ARBSP-B
Name
Van Allen Probes
Status
completed

Details

Astronauts
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Description
NASA’s twin Van Allen Probes, originally called the Radiation Belt Storm Probes, measured the structure and dynamics of Earth’s radiation belts and the behavior of energetic particles under changing solar conditions.
Destination
Near-equatorial elliptical Earth orbit ranging from approximately 1.5 to 6 Earth radii for twin-probe measurements of the Van Allen radiation belts and energetic particles under changing solar conditions
End Date
2019-10-18
Launch Site
Outcome
The Van Allen Probes operated for more than seven years, exceeding their planned two-year mission. They discovered a temporary third radiation belt and identified physical mechanisms that accelerate particles or remove them from the belts, including interactions with plasma waves. Probe B was retired in July 2019 and Probe A on October 18, 2019 as propellant supplies were exhausted, leaving a long archive of coordinated radiation-belt measurements.
Programs
Start Date
2012-08-30
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Creation Time
August 15, 2026 at 09:07:30 UTC
Updated Time
October 29, 2026 at 13:17:49 UTC

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