Descrizione : The Dynamics Explorer (DE) mission`s general objective is to investigate the strong interactive processes coupling the hot, tenuous, convecting plasmas of the magnetosphere and the cooler, denser plasmas and gases corotating in the earth`s ionosphere, upper atmosphere, and plasmasphere. Two satellites, DE 1 and DE 2, were launched together and were placed in polar coplanar orbits, permitting simultaneous measurements at high and low altitudes in the same field-line region.
Data were acquired on a science-problem-oriented basis, with closely coordinated operations of the various instruments, both satellites, and supportive experiments. Measurements were temporarily stored on tape recorders before transmission at an 8:1 playback-to-record ratio. Since commands were also stored in a command memory unit, spacecraft operations were not real time.
Greenbelt DE 1 & 2 to study interaction between earth`s magnetosphere, ionosphere and atmosphere in polar coplanar orbits launched from Vandenberg by Thor Delta.

USA 1547 A - image retouchée ?

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DYNAMICS EXPLORER (DE 1 & 2)