Title

A Time-Varying Radiometric Bias Correction for the TRMM Microwave Imager

Authors

Authors

K. Gopalan; W. L. Jones; S. Biswas; S. Bilanow; T. Wilheit;T. Kasparis

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

IEEE Trans. Geosci. Remote Sensing

Keywords

Intersatellite radiometric calibration; microwave radiometer; special; sensor microwave imager (SSMI); Tropical Rainfall Measurement Mission; Microwave Imager (TMI); WindSat; WATER; SURFACE; MODEL; Geochemistry & Geophysics; Engineering, Electrical & Electronic; Remote; Sensing; Imaging Science & Photographic Technology

Abstract

Recent intersatellite radiometric comparisons of the Tropical Rainfall MeasurementMission Microwave Imager (TMI) with polar orbiting satellite radiometer data and modeled clear-sky radiances have uncovered a time-variable radiometric bias in the TMI brightness temperatures. The bias is consistent with a source that generally cools during orbit night and warms during sunlight exposure. The likely primary source has been identified as a slightly emissive parabolic antenna reflector. This paper presents an empirical brightness temperature correction to TMI based on the position around each orbit and the Sun elevation above the orbit plane. The results of radiometric intercomparisons with WindSat and special sensor microwave imager are presented, which demonstrate the effectiveness of the recommended correction approach based on four years of data.

Journal Title

Ieee Transactions on Geoscience and Remote Sensing

Volume

47

Issue/Number

11

Publication Date

1-1-2009

Document Type

Article; Proceedings Paper

Language

English

First Page

3722

Last Page

3730

WOS Identifier

WOS:000271140400014

ISSN

0196-2892

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