GPM GV

The Global Hydrology Resource Center (GHRC) published the GPM Ground Validation Rain Gauges NASA ACHIEVE IPHEx dataset which includes data from the OSi Optical Rain Gauge (ORG815) and a standard tipping bucket rain gauge.

The Global Hydrology Resource Center (GHRC) published the GPM Ground Validation Vaisala Ceilometer IPHEx dataset.

The Global Hydrology Resource Center (GHRC) has published three Global Precipitation Measurement (GPM) Ground Validation datasets from the Integrated Precipitation and Hydrology EXperiment (IPHEX) field campaign held in North Carolina from May 1, 2014 through June 14, 2014.

The Global Hydrology Resource Center (GHRC) has published seven ground-based radar datasets in the Global Precipitation Measurement (GPM) mission Ground Validation (GV) collection for the GPM Cold-season Precipitation Experiment (GCPEx) which occurred in Ontario, Canada.  These data were collected from seve

GHRC has published Version 2 of the GPM Ground Validation Environment Canada (EC) Micro Rain Radar (MRR) GCPEx dataset. The data were collected GPM Cold-season Precipitation Experiment (GCPEx) in Ontario, Canada during the winter season 2012 and provide derived quantitative rain rates, drop size distributions, radar reflectivity and fall velocities on vertical profiles. The University of Wisconsin reprocessed the original raw spectra into the netCDF format using the Maahn method for netCDF conversion and also using the improved Maahn micro rain radar snow algorithm to convert the snow cases. Updated documentation is also provided.

The Light Precipitation Evaluation Experiment (LPVEx) took place in the Gulf of Finland during September and October, 2010. Microphysical properties, associated remote sensing observations, and coordinated model simulations of high latitude precipitation systems to drive the evaluation and development of precipitation algorithms for current and future satellite platforms were collected. LPVEx consisted of coordinated aircraft flights within an extensive network of ground-based observations that included three dual-polarization, C-band, Doppler radars, a network of surface weather and sounding stations, several micro-rain radars, and surface rainfall and drop size distribution (DSD) measurements from a large number of rain gauges and disdrometers. LPVEx was a collaborative effort between CloudSat, the GPM Ground Validation (GV) program, the Finnish Meteorological Institute (FMI), Environment Canada (EC), the United Kingdom National Environmental Research Council, Vaisala Inc., and the University of Helsinki (UH). The GHRC is the archive and distribution center for data collected during the LPVEx experiment.

The Midlatitude Continental Convective Clouds Experiment (MC3E) took place in central Oklahoma April–May 2011. The experiment was a collaborative effort between the U.S. Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) Climate Research Facility and the National Aeronautics and Space Administration’s (NASA) Global Precipitation Measurement (GPM) mission Ground Validation (GV) program. The field campaign leveraged the unprecedented observing infrastructure currently available in the central United States, combined with an extensive sounding array, remote sensing and in situ aircraft observations, NASA GPM ground validation remote sensors, and new ARM instrumentation purchased with American Recovery and Reinvestment Act funding. The overarching goal was to provide the most complete characterization of convective cloud systems, precipitation, and the environment that has ever been obtained, providing constraints for model cumulus parameterization's and space-based rainfall retrieval algorithms over land that have never before been available. The GHRC is the archive and distribution center for ground validation data collected during the MC3E Experiment . More information on the MC3E Experiment can be found at https://ghrc.nsstc.nasa.gov/home/field-campaigns/mc3e.

NASA is currently flying an airborne science laboratory above Canadian snowstorms to tackle a difficult challenge facing the upcoming Global Precipitation Measurement (GPM) satellite mission -- measuring snowfall from space. Working with Environment Canada, NASA's GPM Cold-season Precipitation Experiment (GCPEx) is measuring light rain and snow in Ontario from Jan. 17 to Feb. 29. More information on the GCPEx Experiment can be found at https://ghrc.nsstc.nasa.gov/home/field-campaigns/gcpex.

The full suite of S-band profiler datasets from the GPM Ground Validation Midlatitude Continental Convective Clouds Experiment (MC3E) is now available: GPM Ground Validation NOAA S-Band Profiler Minute Data MC3E     GPM Ground Validation NOAA S-Band Profiler Raw Data SPC format MC3E GPM Ground Validation NOAA S-Band Profiler Raw Data netCDF format MC3EGPM Ground Validation NOAA S-Band Profiler Original Dwell Data MC3E Note that the Raw profiler data is available in two formats. The original SPC format requires specialized commercial software. The netCDF version contains the same data values and is compatible with the other datasets in the collection. The S-band profiler operates at 2.8 GHz, points vertically, and measures the backscattered power from raindrops and ice particles as precipitating cloud systems pass overhead. Operating between the precipitation (full-power) and attenuated (low-power) modes, the profiler alternated between modes collecting either 7 or 9 consecutive precipitation mode profiles separated by 1 attenuated mode profile. Both modes processed radar pulses collected during a 7-second dwell before calculating the Doppler velocity spectra at each radar range gate that were separated by 60-meters in the vertical. The Original Dwell and Minute datasets contain moment, pop spectra and calibrated spectra files. Find all the data from MC3E here. These data sets can also be ordered from the GHRC using the Hydrologic Data search, Retrieval, and Order system (HyDRO) at http://ghrc.nsstc.nasa.gov/hydro/.

GHRC has published the GPM Ground Validation NOAA UHF 449 Profiler Raw Data SPC dataset. Using a phased array antenna configured to only point in the vertical direction, during MC3E the 449 MHz profiler measured the vertical air motion from approximately 200 to 2000 meters above the ground when precipitation passed over the profiler site. The original SPC format requires specialized commercial read software.  The companion GPM Ground Validation NOAA UHF 449 Profiler MC3E dataset, a netCDF version, contains the exact same raw data values. Additionally this dataset has been recently updated to include processed data and available browse.