Thor Delta C | Explorer 18
Launch Successful
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Nov. 27, 1963, 2:30 a.m.
Instantaneous launch window.
Instantaneous launch window.
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.
American orbital launch vehicle family with Thor first stage and a delta second stage.
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