Quality Assessment of Rain Rate Product from FengYun-3D MWRI

Passive microwave precipitation estimation from FengYun-3 (FY-3) polar-orbiting meteorological satellite plays an important role for global precipitation measurement. This paper carries out quality assessment of FY-3D microwave radiation imager (MWRI) instantaneous surface rain rate product (MRR) from 2018 to 2020 based on Global Precipitation Measurement (GPM) Dual-frequency Precipitation Radar (DPR) Level 2 product (2ADPR). Dichotomous and continuous statistics for quality assessment are analyzed in monthly scale. The results show that FY-3D MRR product, compared with 2ADPR, can identify the occurrence of rainfall well with a high Probability of detection and a low false alarm ratio, and can describe the rain intensity well with a high correlation coefficient and low relative difference. A case over northeast China region also shows a good performance of FY3D MRR product compared with ground Doppler radar data.