Abstract:Hangzhou Xiasha SA weather radar adds sophisticated detection technology based on the dual polarization upgrade. In order to further improve the accuracy of radar quantitative precipitation estimation, this paper, referring to the hourly rain gauge data, corrects the radar precipitation estimation algorithm model. It establishes a model based on the realtime QPE rain intensity correction method for minutelevel rain gauge data (QPEADJUST method for short) and uses rain gauge data to correct the radar’s QPE data bodybybody scan in realtime. Accumulatively complete 1hour and 3hours precipitation estimation products, which improves the radar precipitation estimation accuracy. Through the evaluation of radar products and automatic station data, the precipitation estimation effect of the QPEADJUST method is statistically analyzed from three aspects: the precipitation estimation algorithm, the influence of the radar resolution and the influence of the body scan cycle speed. The results show that the QPEADJUST method is better in the temporal and spatial distribution of precipitation than other algorithms under the conditions of high radar resolution and fast body scanning period, and the reduced error of radar hourly quantitative precipitation estimation from 50% to 20%, which has high estimation accuracy and stability, and operation application value.