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Climatological Processing of Radar Data for the TRMM Ground Validation ProgramThe Tropical Rainfall Measuring Mission (TRMM) satellite was successfully launched in November, 1997. The main purpose of TRMM is to sample tropical rainfall using the first active spaceborne precipitation radar. To validate TRMM satellite observations, a comprehensive Ground Validation (GV) Program has been implemented. The primary goal of TRMM GV is to provide basic validation of satellite-derived precipitation measurements over monthly climatologies for the following primary sites: Melbourne, FL; Houston, TX; Darwin, Australia; and Kwajalein Atoll, RMI. As part of the TRMM GV effort, research analysts at NASA Goddard Space Flight Center (GSFC) generate standardized TRMM GV products using quality-controlled ground-based radar data from the four primary GV sites as input. This presentation will provide an overview of the TRMM GV climatological processing system. A description of the data flow between the primary GV sites, NASA GSFC, and the TRMM Science and Data Information System (TSDIS) will be presented. The radar quality control algorithm, which features eight adjustable height and reflectivity parameters, and its effect on monthly rainfall maps will be described. The methodology used to create monthly, gauge-adjusted rainfall products for each primary site will also be summarized. The standardized monthly rainfall products are developed in discrete, modular steps with distinct intermediate products. These developmental steps include: (1) extracting radar data over the locations of rain gauges, (2) merging rain gauge and radar data in time and space with user-defined options, (3) automated quality control of radar and gauge merged data by tracking accumulations from each instrument, and (4) deriving Z-R relationships from the quality-controlled merged data over monthly time scales. A summary of recently reprocessed official GV rainfall products available for TRMM science users will be presented. Updated basic standardized product results and trends involving monthly accumulation, Z-R relationship, and gauge statistics for each primary GV site will be also displayed.
Document ID
20000108861
Document Type
Preprint (Draft being sent to journal)
Authors
Kulie, Mark (Maryland Univ. Baltimore County Catonsville, MD United States)
Marks, David (Maryland Univ. Baltimore County Catonsville, MD United States)
Robinson, Michael (Maryland Univ. Baltimore County Catonsville, MD United States)
Silberstein, David (Maryland Univ. Baltimore County Catonsville, MD United States)
Wolff, David (Maryland Univ. Baltimore County Catonsville, MD United States)
Ferrier, Brad (Maryland Univ. Baltimore County Catonsville, MD United States)
Amitai, Eyal (Maryland Univ. Baltimore County Catonsville, MD United States)
Fisher, Brad (Maryland Univ. Baltimore County Catonsville, MD United States)
Wang, Jian-Xin (Maryland Univ. Baltimore County Catonsville, MD United States)
Augustine, David (Maryland Univ. Baltimore County Catonsville, MD United States)
Einaudi, Franco
Date Acquired
August 19, 2013
Publication Date
January 1, 2000
Subject Category
Environment Pollution
Funding Number(s)
CONTRACT_GRANT: NCC5-339
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.