GPM GROUND VALIDATION NASA MICRO RAIN RADAR (MRR) GCPEX

Published by NASA/MSFC/GHRC | National Aeronautics and Space Administration | Metadata Last Checked: January 17, 2026 | Last Modified: 2026-01-13

The GPM Ground Validation NASA Micro Rain Radar (MRR) GCPEx dataset was collected by a Micro Rain Radar (MRR), which is a vertically pointing Doppler radar which provides measurements of vertical velocity, drop size distribution, rainfall rate, attenuation, liquid water content, and reflectivity factor obtained during the GPM Cold-season Precipitation Experiment (GCPEx), which took place in Canada during Winter 2011-2012. GCPEx addressed shortcomings in the GPM snowfall retrieval algorithm by collecting microphysical properties, associated remote sensing observations, and coordinated model simulations of precipitating snow. The MRR is a frequency-modulated continuous wave (FMCW) vertically pointing Doppler radar, which operates at 24.24GHz, and it is the second generation of the instrument manufactured by METEK (http://metek.de/product/mrr-2/). NASA MRR data was collected from late October 2011 through March 2013. Version 2 of the dataset became active on 13-May-2015.

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Complete Metadata

bureauCode	[ "026:00" ]
identifier	10.5067/GPMGV/GCPEX/MRR/DATA204
landingPage	https://search.earthdata.nasa.gov/search?q=gpmmrrnagcpex2
programCode	[ "026:000" ]
spatial	["CARTESIAN",[{"WestBoundingCoordinate":-79.7814,"NorthBoundingCoordinate":44.2336,"EastBoundingCoordinate":-79.7175,"SouthBoundingCoordinate":44.1806}]]
temporal	2011-10-24/2011-10-24
theme	[ "Earth Science" ]