Two Dynamics Explorer (DE) spacecraft were launched August 3, 1981, and placed into coplanar polar orbits with DE-1 in a highly elliptical orbit and DE-2 in a lower more circular orbit. The primary objective of the DE program was to investigate magnetosphere-ionosphere-atmosphere coupling processes. The DE-1 Plasma Wave Instrument (PWI) was designed and built by the plasma wave group at The University of Iowa Department of Physics and Astronomy in collaboration with investigators at Stanford University's STAR Laboratory.
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Saucers
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