Accuracy assessment and error cause analysis of GPM (V06) in Xiangjiang river catchment

Abstract Application potential and development prospect of satellite precipitation products such as Tropical Rainfall Measuring Mission (TRMM) Global Precipitation (GPM) have promising implications. This study discusses causes spatiotemporal differences on GPM data through the following steps: Initially, calculate bias between satellite-based rain gauge Xiangjiang river catchment to assess accuracy (06E, 06 L, 06F) products. Second, total errors are divided into hit (HBIAS: detected by both station), missed (MBIAS: only false (FBIAS: GPM). Third, evaluate impact intensity their influence three error components. Several conclusions drawn from results above. (1) Satellite-based measurements perform better a larger temporal-spatial scale. (2) The TRMM displays significant variances space time. Season, intensity, main factors influencing data. (3) detection capability change with seasonal variation different level.