|
|
GPM Ground Validation Composite Satellite Overpasses Table of Contents
The GPM Ground Validation Composite Satellite Overpasses datasets provide specific satellite overpasses for the Midlatitude Continental Convective Clouds Experiment (MC3E) and the GPM Cold-season Precipitation Experiment (GCPEx). Satellite overpasses from AQUA are provided for MC3E while overpasses from the SSMIS satellites (F-16, 17, 18) are provided for GCPEx. These specific satellite overpasses encompass and surround the ground experiment sites by passing within 700-km of the field sites. Radiometric data from the satellites was matched up with other datasets in order to conduct land surface emissivity studies. These other datasets include the NEXRAD NMQ radar mosaic for knowledge of rain structure and intensity at the time of the overpass, as well as the previous accumulated precipitation prior to the satellite overpass time), the NOAA IMS snow mapping system (to identify surface snow or ice cover), and the NASA/GMAO MERRA land and atmospheric reanalysis (for background land and atmospheric state needed for microwave radiative transfer calculations). The Midlatitude Continental Convective Clouds Experiment (MC3E) took place in central Oklahoma during the April-June 2011 period. 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 over arching 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 and space-based rainfall retrieval algorithms over land that had never before been available. Further details on GPM MC3E are available at http://gpm.nsstc.nasa.gov/mc3e/. Information on MC3E ARM is available at http://campaign.arm.gov/mc3e/. The GPM Cold-season Precipitation Experiment (GCPEx) occurred in Ontario, Canada during the winter season of 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. These data sets were collected to aid in the achievement of the over arching goal of GCPEx which is to characterize the ability of multi-frequency active and passive microwave sensors to detect and estimate falling snow. Further details on GCPEx are available at http://gpm.nsstc.nasa.gov/gcpex. Information on the Global Precipitation Measurement (GPM) mission is available at http://pmm.nasa.gov/GPM. Principal Investigator: Joe Turk Co-Investigators: Wes Berg Chris Kummerow The MC3E data files are archived as gzipped files and are named with the following convention:
where,
The GCPEx data files are archived as gzipped files and are named with the following convention:
where,
The GCPEx data files are also available as netCDF files. The GCPEx netCDF files are named with the following convention:
where, Data Format The GPM Ground Validation Composite Satellite Overpasses data sets are available as ASCII text files. The GCPEx data set is also available in netCDF format. More detailed information on the data within the files can be found in the "Precipitation Measuring Missions (PMM) Land Surface Working Group GPM Ground Validation Experiments for Focus Study Areas" document. A sample C based reader can be found in the Basic C Reader document. CitationOur data sets are provided through the NASA Earth Science Data and Information System (ESDIS) Project and the Global Hydrology Resource Center (GHRC) Distributed Active Archive Center (DAAC). GHRC DAAC is one of NASA's Earth Observing System Data and Information System (EOSDIS) data centers that are part of the ESDIS project. ESDIS data are not copyrighted; however, in the event that you publish our data or results derived by using our data, we request that you include an acknowledgment within the text of the article and a citation on your reference list. Examples for general acknowledgments, data set citation in a reference listing, and crediting online web images and information can be found at: http://ghrc.nsstc.nasa.gov/uso/citation.html To order these data or for further information, please contact:
|