Scanning Radiometer observations of hydroxyl airglow over Davis, Antarctica, 1999-2016

These are 1 minute sampled low resolution 'images' of the hydroxyl airglow layer over Davis station, Antarctica (68 degrees S,78 degrees E) derived using a scanning radiometer developed at the University of Western Ontario, Canada. The scans are a 16x16 pixel array and represent hydroxyl airglow variations in a small region (24x24 km) of the night sky in the zenith, approximately 87km above Davis. The instantaneous field-of-view of the 12cm aperture catadioptric telescope is 1 degrees, or a 1.5km radius field at the airglow layer height. Dwell time per 'pixel' is 0.22 sec. The instrument is sensitive in the 1.0 - 1.6 micron infrared region, which encompasses the bright hydroxyl (2-0), (3-1), (4-2) and (5-3) ro-vibrational bands. Observations are made in all cloud conditions between civil twilight (Sun less than 6 degrees below horizon) each year (between about the 6-Feb and 5-Nov at Davis).

本数据集包含由加拿大西安大略大学（University of Western Ontario）研发的扫描辐射计（scanning radiometer）所获取的南极戴维斯站（68°S，78°E）上空羟基气辉层（hydroxyl airglow layer）的1分钟采样低分辨率‘图像’。该扫描结果为16×16像素阵列，对应戴维斯站上空约87公里处天顶方向小片夜空（24×24平方公里）内的羟基气辉变化。该12厘米口径折反射望远镜（catadioptric telescope）的瞬时视场为1度，对应气辉层高度处的视场半径为1.5公里。每个‘像素’的驻留时间为0.22秒。该仪器的敏感波段为1.0~1.6微米红外区，覆盖明亮的羟基(2-0)、(3-1)、(4-2)及(5-3)振转谱带（ro-vibrational bands）。每年在民用暮光（太阳位于地平线下不足6度）期间的所有云量条件下均可开展观测，戴维斯站的观测时段大致为每年2月6日至11月5日。