Learn about different websites and tools that allow you to visualize data from NASA's Global Precipitation Measurement Mission (GPM).

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