Using Trmm Data Inversion, Precipitation Intensity And Vertical Structure Of Hydrometeors

More attention is paid to using satellite passive microwave remote sensing data in estimating precipitation and many algorithms for the retrieval of rainfall have been developed. Since 1994, the algorithms retrieving the vertical structure of precipitation have occurred, GPROF algorithm is one of them, which developed by Kummerow and Olson and used by NASA to retrieve precipitation using TMI data operationally.Two testing GPROF algorithms of version 6 have been used in this paper. The process of replanting platform is described and the code of algorithm is analyzed. Rainfall and vertical profile of hydrometers are retrieved for land and ocean using TMI 1B11 data. The comparison of retrievals of GPROF V6.1 and V6.2 with ground-based radar and gauge data on land and PR data on ocean show that the GPROF-V6 algorithm can retrieve rain intensity much well and indicate vertical distribution of hydrometers mainly. As far as retrieved precipitation area, it is better for convective precipitation type than stratified precipitation type. And more, the improvement and extension of cloud-radiation database can improve the precision of retrieval.Comparison of GPROF-V6.2 with four other algorithms on land show that rain intensities retrieved are similar and a few differences occur to different precipitation types. If an improvement of GPROF algorithm is made according to the precipitation characters of China, considering it is a global algorithm, the precision of retrieval over China may be improved.