Abstract:Based on the automatic weather stations (AWS) precipitation data, an assessment of multi precipitation products is conducted on the rainfall monitoring of typhoon Morakot in the August of 2009. The results show that, the CPAP (China Precipitation Analysis Product) daily grid precipitation data display an accurate spacial distribution and rain intensity on the land, but not in ocean because of the limitation of station distribution. Compared to the ground gauged rainfall measurements, the method CMORPH can well present an exact spiral rain belt around typhoon eye, and also its evolvement, but the location of maximal rainfall center rooted in the rain belt deviates greatly from the actuality. And the intensity of rainfall in the CMORPH is much weaker than that in gauged. In oceans, FY2C does not perform as good as the CMORPH owing to its discontinued rainfall distribution along the coastal areas. Taking the advantages of the gauged rainfall (accuracy) and the CMORPH (pattern), we may get a high quality precipitation product.