TRMM Ground Validation Radar Site Rain Type Totals Map L3 1 month 2 km V7 (TRMM_3A54) at GES DISC

The 3A54 product, 'Site Rainfall Map', is a map of monthly surface rain totals derived from the instantaneous rain rate maps (2A53). The map is in Cartesian coordinates with a 2 km horizontal resolution and covers an area of 300km x 300km at single radar sites while the covered area varies for multiple radar sites - 724 km x 568 km at Texas site and 512 km x 704 km at Florida site. This monthly rainfall map is not a simple accumulation of the instantaneous maps as gaps in the data must be factored into the calculation.

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, 02:43 (UTC)
Created February 19, 2025, 02:43 (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_3A54. TRMM Ground Validation Radar Site Rain Type Totals Map L3 1 month 2 km 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_3A54_7.html.
creator Tropical Rainfall Measuring Mission (TRMM)
graphic-preview-file https://docserver.gesdisc.eosdis.nasa.gov/public/project/GPM/browse/3A54_BR.111201.KWAJ.7.PNG
harvest_object_id 85cd0155-f788-4a0b-a27d-e9c687eb656a
harvest_source_id b37e5849-07d2-41cd-8bb6-c6e83fc98f2d
harvest_source_title DNG Legacy Data
identifier C1332654182-GES_DISC
issued 2011-07-01
landingPage https://cmr.earthdata.nasa.gov:443/search/concepts/C1332654182-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_3A54
source_datajson_identifier true
source_hash b39ce4988f2142e1d92bef7c6c5bc74bbf2f772264c893d5013648047522494d
source_schema_version 1.1
spatial -180.0 -40.0 180.0 40.0
temporal 1997-11-01T00:00:00Z/2015-01-01T23:59:59.999Z
theme {TRMM,geospatial}