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GLOBAL BEHAVIOR OF IONOSPHERE AT 1000-KILOMETER ALTITUDE
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FRIHAGEN J, 1966, ELECTRON DENSITY ED, P322
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HANSON WB, 1964, ELECTRON DENSITY DIS, P361
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ION COMPOSITION AND TEMPERATURE IN TOPSIDE IONOSPHERE
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THOMAS JO, 1966, ELECTRON DENSITY PRO, P322
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THRANE E, 1964, ELECTRON DENSITY ED, P361