Global Precipitation Measurement (GPM) Ground Validation
GPM Ground Validation Data Archive
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Welcome to the
Global Precipitation
Measurement (GPM) mission Ground Validation (GV) web portal. The goal
of this site is to provide a one-stop-shopping portal for accessing the
various radar, disdrometer, gauge and other instrument data sets supporting
GPM GV activities. Use the tabs above to access the various datasets, including:
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Software and Tools
Special and International Partner Projects
GPM Validation Network
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In support of GPM GV efforts, NASA has developed the GPM Ground Validation System
GVS) Validation Network (VN). In the GPM era the VN will perform a direct match-up
of GPM’s space-based Dual-frequency Precipitation Radar (DPR) data with ground radar
data from the U.S. network of NOAA Weather Surveillance Radar-1988 Doppler (WSR-88D,
or NEXRAD. Ground radar networks from international partners will also be part
of the VN. The VN match-up will help evaluate the reflectance attenuation correction
algorithms of the DPR and will identify biases between ground observations and
satellite retrievals as they occur in different meteorological regimes
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Field Campaigns
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The NASA Global Precipitation Measurement Mission (GPM) Ground
Validation (GV) program, as a member of the broader NASA Precipitation
Measurement Mission, is providing ground and airborne precipitation
datasets supporting physical validation of satellite-based precipitation
retrieval algorithms. The requisite GV measurements include
multi-frequency dual-polarimetric radar (S, C, X, Ka/Ku and W bands),
airborne microphysical probe, radar and radiometer observations (e.g.,
provision of a GPM core satellite "proxy"), and ground-based disdrometer
and raingauge network observations as a core instrument and measurement
complement. The GPM-GV instrument suite has been deployed in numerous
field campaigns in several different precipitation regimes. These
campaigns and regimes range from the
Light Precipitation Validation
Experiment (LPVEX),
Helsinki, Finland, fall-winter 2010, partnered with CloudSat; the
Mid-latitude Continental
Convective Clouds Experiment (MC3E),
Ponca City, OK, April-May,
2011, partners DOE-ARM); the
GPM Cold Season Precipitation
Experiment (GCPEX),
Ontario, Canada, Jan-Feb. 2012, partners Environment Canada); the
Iowa Flood Season campaign
(IFloods),
May-June 2013, partner with the University of Iowa; and the
Integrated Precipitation
Hydrology Experiment (IPHEx).
All data from these campaigns are managed by the
GPM GV data portal at GHRC/NSSTC.
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