Explorer 25 Injun-4 Energetic-Particle Radiation-Belt Spacecraft Family
Explorer 25, also known as Injun-4, was a NASA energetic-particle satellite launched November 21, 1964 together with the Explorer 24 air-density balloon. Its instruments measured trapped protons, alpha particles, and electrons in the radiation belts and at high geomagnetic latitudes, improving knowledge of natural and artificial radiation environments.
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Identity
- Aliases
- Explorer 25Explorer XXVInjun-4Injun IV1964 076AExplorer 25 spacecraft
- Family Name
- Explorer 25
- Full Name
- Explorer 25 Injun-4 Energetic-Particle Radiation-Belt Spacecraft Family
- Roles
- orbiterobservatoryresearch
- Status
- retired
- Type
- spacecraft
Details
- Description
- Explorer 25, also known as Injun-4, was a NASA energetic-particle satellite launched November 21, 1964 together with the Explorer 24 air-density balloon. Its instruments measured trapped protons, alpha particles, and electrons in the radiation belts and at high geomagnetic latitudes, improving knowledge of natural and artificial radiation environments.
- First Flight Year
- 1,964
- Last Flight Year
- 1,966
Links
- Official Url
- https://ntrs.nasa.gov/citations/19650009992
Assets & Meta
- Creation Time
- August 14, 2026 at 07:31:48 UTC
- Updated Time
- August 14, 2026 at 07:56:06 UTC