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GPM IMERG Global Viewer View Fullscreen Data Displayed In the window above, the Cesium viewer shows the latest 30-minute, 1-day, and 7-day precipitation accumulations from the IMERG product. For more information on IMERG and other GPM data products, please visit our GPM Data Downloads page.

Direct Statistical Validation A GPM Ground Validation prototype is currently underway to compare TRMM satellite data to similar measurements from the national network of operational weather radars. The goal of the Validation Network is to identify and resolve significant discrepancies between the US national network of ground radar observations and satellite observations. The validation network prototype matches-up TRMM Precipitation Radar (PR, see below image) and quality-controlled NEXRAD reflectivity data (right) for 21 ground radar sites in the Southeastern United States. Conceptually, the

Overview The GPM Cold-season Precipitation Experiment (GCPEx) was conducted in cooperation with Environment Canada in Ontario, Canada from January 17th to February 29th, 2012. The overarching goal of GCPEx was to characterize the ability of multi-frequency active and passive microwave sensors to detect and estimate falling snow through the collection of microphysical property data, associated remote sensing observations, and coordinated model simulations of falling snow. Through collection of these unique datasets, GCPEx's goal is to improve the GPM snowfall retrieval algorithms. The GCPEx

Overview The Iowa Flood Studies (IFloodS) are a ground measurement campaign taking place in eastern Iowa from May 1 to June 15, 2013. The goals of the campaign are to collect detailed measurements of precipitation at the Earth's surface using ground instruments and advanced weather radars and, simultaneously, collect data from satellites passing overhead. The ground instruments will characterize precipitation -- the size and shape of raindrops, the physics of ice and liquid particles throughout the cloud and below as it falls, temperature, air moisture, and distribution of different size

International Collaborative Experiments for Pyeongchang 2018 Olympic and Paralympic Winter Games (ICE-POP 2018) ICE-POP 2018 takes place during the Winter Olympics (February-March) of 2018 and focuses on the measurement, physics, and improved prediction of heavy orographic snow in the PyeongChang region of South Korea. ICE-POP is led by the Korean Meteorological Administration (KMA) as a component of the World Meteorological Organization’s (WMO) World Weather Research Program (WWRP) Research and Development and Forecast Demonstration Projects (RDP/FDP). The 23rd Olympic Winter and the 13th