Aureole Lidar: Ground Based Measurement.

摘要

An optical receiver (aureole) with a 50 milliradian field of view is used to measure the light reflected off a topographic target and forward scattered from aerosol particles back to the receiver. Simultaneously, a laser radar (lidar) backscatter profile is recorded. The aureole intensity provides a constraint of the inversion of lidar backscatter onto extinction profiles. A comparison between values of lidar reflection and aureole values is shown for data from 14 days. Atmospheric conditions on these days varied from extremely clear to fog andrain. Using the lidar/aureole relationship, four hundred consecutive lidar profiles are inverted into extinction profiles and displayed in a time-range false color display. This data was taken prior to the passage of a thunderstorm and reveals lidar's ability to observe the optical differences in small scale turbulent eddies. (rh)