TRMM Ground Validation Rain Existence L2 1 month V7 (TRMM_2A52) at GES DISC

The TRMM_2A52 product displays the existence of rain in the radar volume scan. 'Existence' is the fraction of the radar FOV which has measurable precipitation. The GV radar FOV is defined as a base scan (i.e., the lowest level sweep). Each product file has the Existence data of one site (not one radar) for one month.

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 February 19, 2025, 09:51 (UTC)
Created February 19, 2025, 09:51 (UTC)
accessLevel public
bureauCode {026:00}
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catalog_@id https://data.nasa.gov/data.json
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citation Tropical Rainfall Measuring Mission (TRMM). 2007-01-01. TRMM_2A52. TRMM Ground Validation Rain Existence L2 1 month 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_2A52_7.html.
creator Tropical Rainfall Measuring Mission (TRMM)
graphic-preview-file https://docserver.gesdisc.eosdis.nasa.gov/public/project/GPM/browse/TRMM.logo.PNG
harvest_object_id f097ecea-0357-471e-b449-d036c311b318
harvest_source_id b37e5849-07d2-41cd-8bb6-c6e83fc98f2d
harvest_source_title DNG Legacy Data
identifier C1332654211-GES_DISC
issued 2011-07-01
landingPage https://cmr.earthdata.nasa.gov:443/search/concepts/C1332654211-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_2A52
source_datajson_identifier true
source_hash 31d48b0e190751b5a589c3d503be7079d7693904589e946b7ab34710f8906be9
source_schema_version 1.1
spatial -180.0 -40.0 180.0 40.0
temporal 1995-08-02T00:00:00Z/2012-12-31T23:59:59.999Z
theme {TRMM,geospatial}