The Global Hydrology Resource Center (GHRC DAAC), a NASA Earth science data center managed by the University of Alabama in Huntsville, is pleased to announce the release of the version 7 SSMI/SSMIS F08, F10, F11, F13, F14, F15, F16, F17 Ocean Product Suite from Remote Sensing Systems (RSS) in netCDF (v4) format. These data are generated by the Distributed Information Services for Climate and Ocean Products and Visualizations for Earth Research project, (DISCOVER), PI Frank Wentz, as part of the NASA Making Earth Science Data Records for Use in Research Environments (MEaSUREs) Program.

The RSS Ocean Product Suite includes the following data products for the SSMI/SSMIS instruments on the DMSP F08, F10, F11, F13, F14, F15, F16, F17 polar orbiting satellites:

RSS SSM/I Ocean Products Grids Daily

RSS SSM/I Ocean Products Grids 3-Day Average

RSS SSM/I Ocean Products Grids Weekly Average

RSS SSM/I Ocean Products Grids Monthly Average

Detailed information for these datasets is available in the SSMI and SSMIS netCDF Data Products document.

These data sets can be ordered from the GHRC using the Hydrologic Data search, Retrieval, and Order system (HyDRO) at


The GHRC would like to announce the availability of Open-source Project for a Network Data Access Protocol, OPeNDAP, for our entire RSS Ocean Product Suite which includes data products for the SSMI/SSMIS instruments on the DMSP F08, F10, F11, F13, F14, F15, F16, F17 polar orbiting satellites. OPeNDAP is a data transport architecture and protocol widely used by Earth scientists to access remotely distributed data. OPeNDAP includes standards for encapsulating structured data, annotating the data with attributes and adding semantics that describe the data. Data and metadata hosted through OPeNDAP is available for both interactive browser-based access by users, or through programmatic interfaces allowing applications to access distributed data resources. Access is enhanced by the ability to easily subsample, subset, aggregate and re-format data through interface options. Several existing client applications (e.g. ncBrowse, IDV, Panoply, etc) and software libraries (e.g. netCDF) readily support OPeNDAP data access. 

The GHRC OPeNDAP server is available at

Please contact our User Services Office for more information.


GCPEX logoGHRC has published the GPM Ground Validation DC-8 Camera Nadir GCPEx dataset. This dataset contains geo-located visible-wavelength imagery of the ground obtained from the nadir camera aboard the NASA DC-8 in Canada during the Cold-season Precipitation experiment. The data is available only for February 20, 2012, a clear-air flight day. DC-8 Camera nadir data may be useful for determining snow cover and lake ice cover for emissivity studies in conjunction with CoSMIR data, for example. The dataset also includes, for convenience and reproducibility, aircraft navigation information and ground temperatures to aid in emissivity retrievals.


GCPEX logoNASA 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


MC3E logoThe 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


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