Lightning identification method based on satellite-borne double-frequency precipitation radar and microwave imager

The invention discloses a lightning identification method based on a satellite-borne double-frequency precipitation radar and a microwave imager, and the method comprises the steps: carrying out the space-time matching of the satellite-borne double-frequency precipitation radar and the microwave imager, and obtaining the microwave brightness temperature information of a double-frequency precipitation radar pixel; identifying precipitation pixels according to the near-surface radar reflectivity factor, and identifying a complete precipitation area within the scanning range of the satellite-borne double-frequency precipitation radar as a rain cluster; carrying out statistics to obtain rain cluster physical characteristic parameters; lightning observed by a lightning positioning system is adopted as real-time data, and optimal threshold value training of physical characteristic parameters of lightning rain clusters is carried out; and according to the optimal threshold value of the physical characteristic parame