High-Spectral-Resolution Lidar System: The Use of Atomic Blocking Filter for Measuring Atmospheric Parameters

摘要

The objective of this project is to develop atomic-vapor absorption cells to be used as blocking filters for a high spectral resolution lidar (HSRL). Experimental assessment of the proposed new high-spectral-resolution lidar technique for backscatter ratio and atmospheric temperature measurements in the troposphere is presented. The feasibility of the proposed concept has been demonstrated by laboratory measurements using a cw tunable laser with an atomic vapor filter constructed for this purpose. The status of current laboratory experiment with pulsed system suggests that field measurement of backscatterer ratio can be made to 1% accuracy. A factor of 10 improvement in the accuracy in determining the molecular attenuation factor resulting from the atomic vapor filter is needed for field temperature measurement with a 1 K accuracy. Keywords: Lidar, High-spectral-resolution, Measurements, Aerosol/molecule backscatter ratio, and Tropospheric temperature. (RH)