Simultaneous measurements of airglow OH emission and meteor wind by a scanning photometer and the MU radar

Simultaneous observations of the night airglow OH (6,2) band emission inten sity and rotational temperature, by a sky scanning airglow spectrophotomete r, and meteor winds, by a middle and upper atmosphere radar (MU radar), wer e carried out at Shigaraki (34.9 degrees N, 136.1 degrees E), Japan, from 2 9 October to 11 November 1994, during the CRISTA/MAHRSI campaign. Horizonta l structures in the OH emission intensity and rotational temperature were m onitored 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 wavelike oscillations in both the emission intensity and temperature. Good agreement was found between individual wave parameter s-intrinsic period, phase velocity, horizontal and vertical wavelength - ob tained from the radar and optical techniques. On some occasions a short per iod (similar to 3 h) gravity wave was observed to propagate, superposed on a long period (similar to 9 h) wave. (C) 1999 Elsevier Science Ltd. All rig hts reserved.