For the past eight years (1994 through 2001) extensive summertime measurements have been carried out using the Rayleigh lidar. These summer observationscover the period from mid-June through late August. From these observations, over 240 hours of noctilucent clouds have been detected by the lidar. These unique observations enable us to study detailed characteristics of the clouds such as their height, thickness, backscatter ratio, and temporal evolution.
These observations have revealed significant day to day variability in cloud features as well as in their presence. These data have been organized and are presented below at a temporal resolution of 1 minute and a vertical resolution of 192 meters.