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This study evaluates the applicability of the Tropical Rain Measurement Mission (TRMM) 3B43V7 product for use throughout mainland China. Four statistical metrics were used based on the observations made by rain gauges; these metrics were the correlation coefficient ( R ), the relative bias ( RB ), the root mean square error ( RMSE ) and Nash-Sutcliffe efficiency ( NSE ), and they were chosen to evaluate the performance of the 3B43V7 product at temporal and spatial scales. The results revealed that 3B43V7 performed satisfactorily on all timescales ( R  > 0.9 and  NSE  > 0.86); however, it overestimated the results when compared with the rain gauge observations in certain circumstances ( RB  = 9.7%). Monthly estimates from 3B43V7 were in agreement with rain gauge observations. 3B43V7 can effectively capture the seasonal patterns of precipitation characteristics over mainland China. However, 3B43V7 tends to register a greater overestimation of precipitation in the winter ( RB  = 14%) than in other seasons while showing greater consistency with the observations made by rain gauges during dry periods. The 3B43V7 product performs well in the eastern part of mainland China, while its performance is poor in the western part of mainland China. In terms of altitude, 3B43V7 performs satisfactorily in areas with moderate to low altitudes (when altitude < 3,500 m,  R  > 0.9,  NSE  > 0.8 and  RB  < 10.2%) but  RB  values increase with altitude. Overall, 3B43V7 had a favorable performance throughout mainland China.

Multidimensional evaluation of the TRMM 3B43V7 satellite-based precipitation product in mainland China from 1998–2016