Editorial Type:
Article
Article Type:
Research Article

Critical Analyses of Data Differences between FNMOC and AFGWC Spawned SSM/I Datasets

Adrian A. Ritchie Jr. Hughes STX, Global Hydrology and Climate Center (GHCC), Huntsville, Alabama

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Matthew R. Smith Hughes STX, Global Hydrology and Climate Center (GHCC), Huntsville, Alabama

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H. Michael Goodman NASA/Marshall Space Flight Center, GHCC, Huntsville, Alabama

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Ronald L. Schudalla Hughes STX, Global Hydrology and Climate Center (GHCC), Huntsville, Alabama

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Dawn K. Conway Hughes STX, Global Hydrology and Climate Center (GHCC), Huntsville, Alabama

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Frank J. LaFontaine Hughes STX, Global Hydrology and Climate Center (GHCC), Huntsville, Alabama

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Don Moss University of Alabama in Huntsville, GHCC, Huntsville, Alabama

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Brian Motta Hughes STX, Global Hydrology and Climate Center (GHCC), Huntsville, Alabama

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Print Publication:
01 May 1998
DOI:
https://doi.org/10.1175/1520-0469(1998)055<1601:CAODDB>2.0.CO;2
Page(s):
1601–1612
Restricted access

Abstract

Antenna temperatures and the corresponding geolocation data from the five sources of the Special Sensor Microwave/Imager data from the Defense Meteorological Satellite Program F11 satellite have been characterized. Data from the Fleet Numerical Meteorology and Oceanography Center (FNMOC) have been compared with data from other sources to define and document the differences resulting from different processing systems. While all sources used similar methods to calculate antenna temperatures, different calibration averaging techniques and other processing methods yielded temperature differences. Analyses of the geolocation data identified perturbations in the FNMOC and National Environmental Satellite, Data and Information Service data. The effects of the temperature differences were examined by generating rain rates using the Goddard Scattering Algorithm. Differences in the geophysical precipitation products are directly attributable to antenna temperature differences.

Corresponding author address: Dr. Adrian Ritchie Jr., GHCC, Research Park West, 977 Explorer Blvd., Huntsville, AL 35806.

Email: adrian.ritchie@msfc.nasa.gov

Abstract

Antenna temperatures and the corresponding geolocation data from the five sources of the Special Sensor Microwave/Imager data from the Defense Meteorological Satellite Program F11 satellite have been characterized. Data from the Fleet Numerical Meteorology and Oceanography Center (FNMOC) have been compared with data from other sources to define and document the differences resulting from different processing systems. While all sources used similar methods to calculate antenna temperatures, different calibration averaging techniques and other processing methods yielded temperature differences. Analyses of the geolocation data identified perturbations in the FNMOC and National Environmental Satellite, Data and Information Service data. The effects of the temperature differences were examined by generating rain rates using the Goddard Scattering Algorithm. Differences in the geophysical precipitation products are directly attributable to antenna temperature differences.

Corresponding author address: Dr. Adrian Ritchie Jr., GHCC, Research Park West, 977 Explorer Blvd., Huntsville, AL 35806.

Email: adrian.ritchie@msfc.nasa.gov

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