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Lisa Milani, Mark S. Kulie, Daniele Casella, Pierre E. Kirstetter, Giulia Panegrossi, Veljko Petkovic, Sarah E. Ringerud, Jean-François Rysman, Paolo Sanò, Nai-Yu Wang, Yalei You, and Gail Skofronick-Jackson

waters, coastlines, and sea ice edge. These classes come from a cluster analysis, purely empirical self-grouping of emissivity characteristics ( Prigent et al. 2006 ). The TPW and T2m parameters are obtained from the Global Atmospheric Analysis (GANAL; JMA 2000 ) and the European Centre for Medium-Range Weather Forecasts ( Dee et al. 2011 ) reanalysis datasets for the operational and the climatological GPROF outputs, respectively. For this study, the 1C-R-GMI product (TBs) and the climatological 2A

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Sarah Ringerud, Christa Peters-Lidard, Joe Munchak, and Yalei You

correlated to regional climate conditions. Subsequent versions of GPROF addressed this by constraining the TRMM (ocean only) GPROF retrievals by two environmental parameters, namely total precipitable water (TPW) and sea surface temperature (SST) ( Kummerow et al. 2011 ). Moving forward to GPM, these same techniques were adapted to land surfaces, by replacing the SST with the 2 m air temperature commonly available from forecast and reanalysis models. In a series of papers describing and testing the Cloud

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Veljko Petković, Marko Orescanin, Pierre Kirstetter, Christian Kummerow, and Ralph Ferraro

Microwave Sounder API Application programming interface BB Bright band DNN Deep neural network DPR Dual-frequency precipitation radar ECMWF European Centre for Medium-Range Weather Forecasts FOV Field of view GANAL Global analysis GLM Geostationary Lightning Mapper GMI GPM Microwave Imager GPM Global Precipitation Measurement GPROF Goddard profiling algorithm GV-MRMS Ground Validation–Multi Radar/Multi Sensor HSS Heidke skill score IR Infrared JMA Japan Meteorological Agency MHS Microwave Humidity

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Clément Guilloteau and Efi Foufoula-Georgiou

-Frequency Precipitation Radar ECMWF European Centre for Medium-Range Weather Forecasts ERA ECMWF Re-Analysis GCOM-W1 Global Change Observation Mission–Water GMI GPM Microwave Imager GPM Global Precipitation Measurement GPROF Goddard profiling algorithm GSMaP-MVK Global Satellite Mapping of Precipitation with Moving Vectors and Kalman filtering IMERG Integrated Multisatellite Retrievals for GPM KuPR Ku Precipitation Radar MHS Microwave Humidity Sounder NASA National Aeronautics and Space Administration SAPHIR Sondeur

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