Proposal of UV Rayleigh-scattering Lidar for Three-dimensional Measurement of Atmospheric Temperature Profilesin the Troposphere

摘要

We describe the principle of a high-resolution Rayleigh scattering lider system operating at 355nm wavelength. based on measurement of the linewidth of moleclar Rayleigh scattering to povide atmospheric density and temperature profiles. A differential spectroscopic technique. which is used to compare four different frequency signals from the etalon makes the measurement insensitive to both the influence of intense aerosol backscattered signal in the lower troposphere， and the仕frequency shift of the single mode laser. Numerical culculation at 355nm laser wavelength assuming compact system parameter shows an accuracy for temperature profiles better than 1K standard deviation from the ground to an altitude of 8 km for 1000 shot average. The system is eye-safe and can be used for various fields of meteorologica1 and environmental instrumentation.