An experiment designed to measure the ambient neutral composition of the upper atmosphere was flown aboard a Nike-Cajun rocket launched at 1302 EST, May 18, 1962, at Wallops Island, Virginia. This is a preliminary report of a result of that firing. The major differences between this experiment and those conducted in the past by other investigators [Meadows and Townsend, 1960; Pokhunkov, 1962] were:
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Edward Schaefer (1963) studied this question.
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