Verification study over Africa and Europe of gridded daily precipitation obtained by merging multiple microwave-based satellite products

To what extent the constellation of PMW radiometers in the Global Precipitation Measurement (GPM) mission can be used to obtain precipitation estimates on a daily scale in agreement with ground-based measurements? To answer this question, we perform two verification studies by using daily precipitation products on a regular grid. o Over Europe and Africa for the years 2011-2013 we analyze daily precipitation products at 1.0° x 1.0°, obtained by combining MW-based instantaneous precipitation estimates from cross-track and conical scanning radiometers in the GPM constellation, using GPCC global dataset as reference. The analysis is carried out for daily rainfall estimates obtained from instantaneous rainfall rate products CDRD and PNPR developed at ISAC-CNR. o Over Italy for the years 2011-2014 we analyze daily precipitation products at 0.25° x 0.25°, obtained by combining CDRD and PNPR products with SM2RAIN daily rainfall, derived from two successive soil moisture (SM) MW-based estimates by means of an algorithm developed at IRPI-CNR, using the Italian raingauge network as reference.