GHRC has published another GPM Cold-season Precipitation Experiment (GCPEx) dataset: GPM Ground Validation NASA Micro Rain Radar (MRR) GCPEx. This second generation MRR is a vertically pointing Doppler radar providing measurements of vertical velocity, drop size distribution, rainfall rate, attenuation, liquid water content, and reflectivity factor. The NASA MRR data was collected in Canada from late October 2011 through March 2013.