Abstract:The precipitation estimation ability of the integrated multi-satellite retrievals for global precipitation measurement (GPM/IMERG) was refined evaluated in the study, using the measurements from the dense ground-based gauges for Typhoon Nida precipitation, in multiple temporal scales including 1, 3, 6, 12 and 24 hour precipitation accumulation time for different rain intensity, such as the light rain, the moderate rain, the heavy rain and the rainstorm, respectively. The main conclusions are as follows:(1) The duration of precipitation accumulation affects the estimation accuracy of IMERG. The consistency between IMERG and the ground-based gauges increases as the increase of precipitation accumulation time, and the relative bias and random error of relative bias both decrease. (2) The accuracy of IMERG with different rain intensity has a large deviation from the ground-based gauges in 1 hour precipitation accumulation. (3) The IMERG overestimate the precipitation and underestimate the probability of light rain. The accuracy of IMERG for light rain needs to be improved. (4) The IMERG can capture the spatial distribution of rainstorm. However, the IMERG has a certain degree of underestimation when the rain intensity is large.