*4.2. Evaluation at the Daily Scale*

Figure A4 compares the scatterplots between observed and estimated daily rainfall among the SPPs. Daily rainfall estimates by the IMERG\_F cluster the closest around the 1:1 line, while 3B42RT estimates deviating the largest with a strong tendency of overestimation. For the daily scale assessment of SPPs, four continuous (CC, RMSE, RB, and MAD) and three categorical (POD, CSI, FAR) evaluation metrics are calculated using daily rainfall records at the 13 rainfall stations and the corresponding SPP estimates from 1 January 2009 to 31 December 2017.
