Scout X-4 | Explorer 20
Status: Success | Launched: Aug 25, 1964 13:43 UTC
Launch Provider & Rocket
- Provider: National Aeronautics and Space Administration (Government)
- Rocket: Scout X-4 — Scout family
Mission
Explorer 20 (IE A, Ionospheric Explorer A, TOPSI, Top Side Explorer or S 48) was designed to measure electron distribution, ion density and temperature, and to estimate cosmic noise levels between 2 and 7 MHz.
- Type: Earth Science
- Orbit: Low Earth Orbit (LEO)
Launch Site
- Pad: Space Launch Complex 5
- Location: Vandenberg SFB, CA, USA
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Launch data sourced automatically from the Launch Library 2 API. Last refreshed: 2026-10-07T01:00:56.820087+00:00.