热层夜间准1h周期变化

Quasi-hourly Variation of the Night Thermosphere

本文根据陕西天文台气晖观测站的测量数据，利用频谱分析的方法，对热层中的周期变化进行了分析，发现了在热层中存在着６４．６分的周期变化，并对这种周期变化的机制进行了初步的探讨。文中的结果与ＣｈａｒｔｅｓＮｉａｎｇｏｒａｎ在４０００ｍ高度利用雷达方法得到的结果基本一致。

According to the airglow dais measured at the Shanxi Astronomical Observatory, a quaisi-hourly variation in the thermosphere has been obtained by autocorrelation power spectrum, cross correlation power spectrum and periodogram method.The period is 64.5mis at night. Also, the mechanism of the variation is discussde.The results obtained agree well with Charles Niangoran's results.