GHRC News

Sample imageThe NASA Global Hydrology Resource Center (GHRC) DAAC published the GPM Ground Validation Global Flood Monitoring System (GFMS) Flood Maps IFloodS dataset. This dataset contains global flood estimates on a 0.25 degree spatial resolution every 3 hours, from March 26, 2013 through June 30, 2013. These data are provided in support of the Iowa Flood Studies (IFloodS) experiment conducted in eastern Iowa. The goals of the IFloodS campaign were to collect detailed measurements of precipitation at the Earth’s surface using ground instruments and advanced weather radars and to simultaneously collect data from satellites passing overhead. The data are available in netCDF-4 and ASCII formats. Flood map and rain graph files are available in KMZ, JPG, and GIF formats.
 
The NASA Global Hydrology Resource Center (GHRC) DAAC published the GPM Ground Validation TRMM 2A25 NRT Precipitation Radar IPHEx dataset. These data are estimates of instantaneous three-dimensional distribution of rain from the Tropical Rainfall Measuring Mission (TRMM) Precipitation Radar (PR). The TRMM 2A25 (NRT) orbital precipitation radar data from NASA GES DISC have been extracted for the southeast US region for May 1 to June 16, 2014 during the GPM Ground Validation Integrated Precipitation and Hydrology Experiment (IPHEx) field campaign. This data product contains the average rainfall rate between two predefined altitudes derived from each radar beam position. Other output data include parameters of Z-R relationships (R=aZb), integrated rain rate of each beam, range bin numbers of rain layer boundaries, and many intermediate parameters. Data files are available in HDF-4 format, while corresponding browse images are also available in PNG format. It should be noted that this dataset is constructed from the NASA GES DISC Please refer to section 2-3. 8. in the Tropical Rainfall Measuring Mission (TRMM) Precipitation Radar Algorithm Instruction Manual For Version 7 document (http://www.eorc.jaxa.jp/TRMM/documents/PR_algorithm_product_information/...) regarding caveats about the 2A25 algorithm. 

Location of MASC instrumentThe NASA Global Hydrology Resource Center (GHRC) DAAC published the GPM Ground Validation Microwave Atmospheric Sounder on Cubesat (MASC) OLYMPEX dataset (http://dx.doi.org/10.5067/GPMGV/OLYMPEX/MASC/DATA101).

This dataset  consists of microwave radiance measurements collected during the GPM Ground Validation Olympic Mountains Experiment (OLYMPEX) field campaign held in the Pacific Northwest. These data were collected by the MASC aboard the NASA DC-8 aircraft, for dates between November 10, 2016 and December 13, 2016. The data are provided in HDF-EOS5 format. 

Image source: https://cpex.jpl.nasa.gov/instruments/masc.php

HS3 study areaThe NASA Global Hydrology Resource Center (GHRC) DAAC has published its first Field Campaign Micro Article. This Micro Article features the Hurricane and Severe Storm Sentinel (HS3) Field campaign. This campaign was a NASA mission that studied Atlantic Ocean hurricane formation using a pair of NASA Global Hawk unmanned aircraft. The mission occurred over 5 northern hemisphere late summers, with the primary focus on 2012, 2013, and 2014.

The HS3 Micro Article can be found at https://ghrc.nsstc.nasa.gov/home/micro-articles/field-campaign-hurricane-and-severe-storm-sentinel-hs3.

Sample browse imageThe NASA Global Hydrology Resource Center (GHRC) DAAC published the GPM Ground Validation Airborne Precipitation Radar 3rd Generation (APR-3) OLYMPEX V2 dataset (http://dx.doi.org/10.5067/GPMGV/OLYMPEX/APR3/DATA201).

This dataset was collected from November 12, 2015 to December 19, 2015 during the GPM Ground Validation Olympic Mountains Experiment (OLYMPEX) field campaign held in the Pacific Northwest. This dataset is version -2 (V2) of the APR-3, an enhanced and upgraded instrument derived from the APR-2 used in previous field campaigns. APR-3 has the addition of W-band measurement capability, and scans cross-track from +/- 25° to the right and left of nadir. Ku-band, Ka-band, and W-band frequency Doppler measurements are made by APR-3 from the DC-8 aircraft at 10 km altitude during OLYMPEX. The APR-3 dataset files are in HDF-5 format with JPG format browse images. This dataset contains radar reflectivity, Doppler velocity for all bands, linear depolarization ratio at Ku-band, and normalized radar cross section measurements at Ka and Ku-bands. It should be noted that this dataset is version 2, replacing the previous APR-3 dataset published by GHRC in 2017 (DOI for previous version: http://dx.doi.org/10.5067/GPMGV/OLYMPEX/APR3/DATA101). This APR-3 dataset is intended for research and users should contact the APR-3 team regarding data use, especially before publication or public presentation. This dataset is still undergoing validation and quality control. Users are invited to address questions and provide feedback to the Data Provider.

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