Statistical Characteristics of Microwave Radiometers in Different Weather Conditions

本文利用武汉暴雨研究所在随州建设的TK001型微波辐射计，结合地面观测资料，分析了不同天气下积分水汽含量、积分液态水含量的变化特征，得出以下结论：(1) 降水开始前1小时不同雨强下V值(积分水汽含量)与L值(积分液态水含量)都会迅速攀升；(2) V > 40 mm，L > 1 mm可以作为随州发生降水的一个指标；(3) 降水天气下，V、L值变化较为剧烈，晴空条件下，V值、L值变化较为平稳，阴天、多云条件下，V值与L值则较晴天天气下更为剧烈，但是没有降水天气下变化大，V值与L值探测参量变化在天气预报服务中具有一定的指示意义。In this paper, the TK001 microwave radiometer built in Suizhou by the rainstorm Research Institute in Wuhan is used to analyze the variation characteristics of integrated water vapor content and integrated liquid water content under different weather conditions, combining with ground observation data. The following conclusions were drawn: 1) One hour before precipitation starts, the V value (integral water vapor content) and L value (integral liquid water content) will rise rapidly under different rainfall intensity; 2) V > 40 mm and L > 1 mm can be used as an indicator of precipitation occurrence in Suizhou; 3) Under rainy weather, the changes in V and L values are more severe. Under clear sky conditions, the changes in V and L values are more stable. Under cloudy and cloudy conditions, V and L values are more severe than under clear weather, but the change is not greater than that under rainy weather. The changes in the detection parameters of V and L values have certain indicative significance in weather forecasting services.