TRMM Ground Validation Radar Site 3D Reflectivity L2 1 hour V7 (TRMM_2A55UW) at GES DISC

This dataset is part of the University of Washington TRMM Ground Validation products.

Multiple-level cartesian grid containing output of NCAR SPRINT interpolation of CZ and VR fields of 1C51UW. Horizontal extent is 150x150km and resolution is 2km. Vertical range is 2-15km and resolution is 1km. Unlike other products, 2A55UW is not created for every volume but only for volumes of interest. These are defined as volumes within +/-15 minutes of overpass times and volumes with significant rainfall (areal rainfall rate greater or equal 0.15mm/hr).

A key component of the TRMM project is the Ground Validation (GV) effort which consists of collecting data from ground-based radar, rain gauges and disdrometers. The data is quality-controlled, and then validation products are produced for comparison with TRMM satellite products.

The four primary GV sites are:

  • Darwin, Australia;
  • Houston, Texas;
  • Kwajalein, Republic of the Marshall Islands;
  • Melbourne, Florida.

A significant effort is also being supported at NASA Wallops Flight Facility (WFF) and vicinity to provide high quality, long-term measurements of rain rates (via a network of rain gauges collocated with National Weather Service gauges), as well as drop size distributions (DSD) using a variety of instruments, including impact-type Joss Waldvogel, laser-optical Parsivel, as well as two-dimensional video disdrometers. DSD measurements are also being collected at Melbourne and Kwajalein using Joss-Waldvogel disdrometers.

Data and Resources

Additional Info

Field Value
Maintainer ANDREY SAVTCHENKO
Last Updated July 17, 2025, 14:20 (UTC)
Created March 31, 2025, 13:53 (UTC)
accessLevel public
bureauCode {026:00}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_@id https://data.nasa.gov/data.json
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
citation Tropical Rainfall Measuring Mission (TRMM). 2007-01-01. TRMM_2A55UW. TRMM Ground Validation Radar Site 3D Reflectivity L2 1 hour V7. Greenbelt, MD. Archived by National Aeronautics and Space Administration, U.S. Government, Goddard Earth Sciences Data and Information Services Center (GES DISC). https://disc.gsfc.nasa.gov/datacollection/TRMM_2A55UW_7.html.
creator Tropical Rainfall Measuring Mission (TRMM)
graphic-preview-file https://disc2.gesdisc.eosdis.nasa.gov/data/TRMM_GV_L2/TRMM_2A55.7/2008/033/2A55_BR.080202.12.KWAJ.7.PNG
harvest_object_id 2416c57f-e25f-4046-a6a6-74bf5f4a1439
harvest_source_id 61638e72-b36c-4866-9d28-551a3062f158
harvest_source_title DNG Legacy Data
identifier C1356506694-GES_DISC
issued 2011-07-01
landingPage https://cmr.earthdata.nasa.gov:443/search/concepts/C1356506694-GES_DISC.html
language {en-US}
metadata_type geospatial
modified 2016-05-09
programCode {026:001}
publisher NASA/GSFC/SED/ESD/GCDC/GESDISC
release-place Greenbelt, MD
resource-type Dataset
series-name TRMM_2A55UW
source_datajson_identifier true
source_hash efcb54b9fed8da8f870144f04e938bd2d5daf6b67b37699ca14534ebd86c87f7
source_schema_version 1.1
spatial -180.0 -40.0 180.0 40.0
temporal 1999-01-09T00:00:00Z/2003-12-31T23:59:00Z
theme {TRMM,geospatial}