Precipitation estimation method and device based on hybrid scanning of weather radar networking

A precipitation estimation method based on hybrid scanning of weather radar networking, characterized by comprising:

• deploying multiple radars comprising dual polarization radar and single polarization radar in an area to form a weather radar network and observing together through the hybrid scanning to obtain scanning data by the multiple radars;
• obtaining an initial configuration data of the multiple radars from the weather radar network, the initial configuration data comprises a terrain elevation data and an elevation scanning data;
• constructing an initial data grid according to a projection mode, a networking range and a resolution of radar networking precipitation estimation, and constructing an elevation data grid according to the terrain elevation data in radar networking area in the same projection mode, the same networking range and the same resolution;
• converting coordinates of the initial data grid into longitude and latitude coordinates, and calculating an intersection height between a geocentric line of the longitude and latitude coordinates of the initial data grid and the elevation scanning data of each radar in the radar networking area;
• selecting the scanning data corresponding to an intersection height in a range of intersection heights nearest to a preset near-surface height H in the elevation data grid as the scanning data of the initial data grid and performing precipitation assessment according to the intersection height corresponding to each radar;
• selecting the scanning data corresponding to a scanning position nearest to the preset near-surface height H in the elevation data grid as the scanning data of the initial data grid and performing precipitation assessment according to the intersection height corresponding to each radar, comprising:
• in the case that the scanning data nearest to the preset near-surface height H in the elevation data grid is the scanning data from the single polarization radar, determining whether there is dual polarization radar scanning data intersecting the intersection height between a redundancy selection range H−T/2 and H+T/2, and T is a data redundancy thickness;
• if there is the scanning data from dual polarization radar, taking the scanning data from the dual polarization radar as the scanning data of the initial data grid and performing precipitation assessment;
• if no the scanning data from the dual-polarization radar exists, taking the scanning data from the single polarization radar as the scanning data of the initial data grid and performing precipitation assessment.