Applicability research on TRMM-3B43 precipitation over Xinjiang

In this paper , an attempt has been made to estimate rainfall over the Xinjiang region by using the Tropical Rainfall Measuring Mission ( TRMM)-3 B43 product for the period of 2003-2008 and rain gauge data from 105 weather stations at different time intervals .The results show that the TRMM rainfall product is generally consistent with the measured one on the yearly -scale; Goodness of fit of seasonal precipitation between TRMM estimates and observed data is high , with the goodness of fit being insignificantly different between the seasons and the correlation coefficients being above 0 .7; For the month scale , TRMM product has statistically significant correlation(r=0.75)with rain gauge data;For individual stations, at most stations the correlation coefficients are reasonably high and the estimation biases are small .An analysis of the error obtained from each site showed that most of them (60%)are within 30%, while the overall fitting correlation coefficient reached 0.81, suggesting that there is good consistency between TRMM precipitation data and observed precipitation . Overall, TRMM precipitation products have certain deviation in time and space , but the deviations have certain regularity . Calibration is indispensable processing in application .