Simultaneous measurements of airglow oh emissionand meteor wind by a scanning photometer and the muradar

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Scientific paper

Simultaneous observations of the night airglow OH (6,2) band emission intensity androtational temperature, by a sky scanning airglow spectrophotometer, and meteor winds, by amiddle and upper atmosphere radar (MU radar), were carried out at Shigaraki (34.9°N, 136.1°E), Japan, from 29 October to 11 November 1994, during the CRISTA/MAHRSIcampaign. Horizontal structures in the OH emission intensity and rotational temperature weremonitored optically, together with the background wind and its wave induced fluctuations,measured by MU radar. A total of 5 nights among the 7 nights of useful data showed wavelikeoscillations in both the emission intensity and temperature. Good agreement was found betweenindividual wave parameters-intrinsic period, phase velocity, horizontal and verticalwavelength-obtained from the radar and optical techniques. On some occasions a short period(~3 h) gravity wave was observed to propagate, superposed on a long period (~9 h) wave.

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