| Atmosphere temperature is one of the basic parameters that describe the atmosphere state.The real-time detection of the atmospheric temperature profile is of great significance for the study of solar radiation, explaination of the warming of the earth's temperature, and improvement of the accuracy of weather forecast. Lidar can realize high temporal and spatial resolution detect for the atmosphere temperature as active remote sensing method. Hyperspectral Rayleigh lidar is widely used to detect the atmospheric temperature based on the dependence of Rayleigh scattering spectrum width and temperature.The all time measurement is limited for 532nm and 355nm wavelength HSRL because of the influence of the solar background light. In this paper, the UV solar blind wavelength 266nm is proposed as the excitation wavelength of HSRL system to detect the atmospheric temperature.The molecular scattering intensity of 266nm wavelength is stronger and the spectral width is wider. the solar blind band is not affected by the background light of the solar radiation. Three Fabry-Perot etalon (FPE) filters are used as spectrometers. The parameters of FPE is analyzed,The center frequency of FPEs are 0GHz, 1.4GHz and 3.5GHz relative to the laser central frequency and the spectral width. The calculation results showed that a Mie rejection is -87dB and Rayleigh transmittance is greater than 1% for the two Rayleigh channels.According to the design of system parameters, the system simulation is carried out by using the standard atmospheric model. The simulation results showed that the temperature detection error is less than 1K below 3.2km for daytime and 5.0km for night, taking into account the influence of a small amount of near surface ozone absorption for 266nm wavelength. The results show that the HSRL of 266nm can realize all time the atmospheric temperature measurement and provide a feasible method for the detection of atmospheric temperature during the day. |
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