Investigation On Data Processing For Ground-based Microwave Radiometer And Its Response To Lightning High Temperature

In this paper, the author made some tentative research work in the data processing and application of the ground-based microwave radiometer.Firstly, combining the reality of radiosounde two times each at8:00am and8:00pm every day, the author proposed to judge microwave radiometer’s working condition during the observation period according to the microwave radiometer observations at8:00am and8:00pm every day and the atmospheric temperature characteristics of seasonal change. On the basis of experimental characteristics of the atmospheric temperature changes in Nanj ing’s spring and winter, by taking08:00-sunny-day experimental observations of a radiometer in Nanjing from Nov.27,2010to May29,2011as example, the author made statistical comparison of the bright temperature measurements and numerical calculation results and physical analysis in its12channels and provided the radiometer working condition judgment during experimental observation, which provided reference to the microwave radiometer observation data quality control.Secondly, the author believed that in the inversion of the clear sky atmospheric temperature and relative humidity profiles, localized BPNN inverse algorithm is superior to the inverse algorithm of instrument itself the RNN. Thus, assorted inversion software must be localized while introducing foreign advanced hardware technology, to maximize the use of local resources.Thirdly, on the basis of microwave radiation transfer theory, the author studied the theoretical basis of the ground-based microwave radiometer bright temperature observation response to the high temperature gas column that produces when lightning occurs, tentatively proposed the theoretical expression of the amount of brightness temperature response and also carried on theory simulation. It concluded that:Microwave radiometer light temperature increment observed in any channel decreased along with distance Rl increase between lightning channel to the radiometer; Close (R1=0) lightning makes ground-based microwave radiometer light temperature increment in the channel with stronger atmospheric absorption bigger; Thus there will be a certain frequency corresponding to the maximum light temperature increment compared to all channels in a certain distance.0.5K microwave radiometer sensitivity observing lightning is of great possibility, but it needs the actual observation, the difficulty may be how to point your antenna radiometer lightning.In the end, the author prospected subsequent research work; hoped to further improve the accuracy of the inversion; and also explored the possibility of lightning observation by ground-based microwave radiometer in the way of actual observation of artificially triggered lightning...