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Explorer 18
Thor Delta CUnited States Air ForceSpace Launch Complex 17B
Wednesday, November 27, 1963 · 02:30 AM UTCAdd to Calendar
This mission is complete.
Mission Brief
Explorer 18 (IMP 1, Interplanetary Monitoring Platform) was a solar-cell and chemical-battery powered spacecraft instrumented for interplanetary and distant magnetospheric studies of energetic particles, cosmic rays, magnetic fields, and plasmas.
PayloadExplorer 18
OrbitElliptical Orbit
CustomerUnited States Air Force
Stages0
PadSpace Launch Complex 17B, Cape Canaveral SFS, FL, USA
Mission Timeline
14 / 14100%Site lock
Launch Site
Space Launch Complex 17B, Cape Canaveral SFS, FL, USA
28.446°N, 80.566°W
Schedule History
No delays or schedule changes recorded.




