Mar 27 1976
From The Space Library
27-28 March: A series of rocket experiments funded by the National Science Foundation and NASA was launched from Poker Flat Range, Alaska, to measure magnitude and direction of electric fields and neutral winds in the auroral atmosphere. Spectrographic observations of the releases of barium vapor on 2 successive days indicated that a pulsating aurora was induced by vapor releases near 250 km altitude, but only when the explosions occurred in the path of precipitating electrons associated with the visible aurora. Previous experiments had produced no definite evidence of pulsations, and the experiments would be repeated to clarify the results. (Nature, 12 May 77, 135)
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