A New Sidelobe Correction Algorithm for Microwave Radiometers: Application to the Envisat Instrument

Author

Obligis, Estelle ; Eymard, Laurence ; Tran, Ngan

Author_Institution

Space Oceanogr., Collecte Localisation Satellites, Ramonville Saint-Agne

Volume

45

Issue

3

fYear

2007

fDate

3/1/2007 12:00:00 AM

Firstpage

602

Lastpage

612

Abstract

The antenna temperature measured by a microwave radiometer is converted in brightness temperature (TB) by removing the different contributions that do not come from the main lobe of the antenna. Among them, the Earth contribution in the sidelobes may be significant as for the Environmental Satellite mission due to the antenna position on the platform. In such a case, simple corrections commonly applied on previous altimetry missions are inadequate, and a more accurate correction should be determined. We propose in this paper a new method based on global seasonal tables of contamination. This allows application of an accurate sidelobe correction in space and time in the retrieved TB computation

Keywords

artificial satellites; geophysical techniques; radiometers; Environmental Satellite mission; Envisat instrument; antenna position; antenna temperature; brightness temperature; global seasonal contamination tables; microwave radiometers; sidelobe correction algorithm; Antenna measurements; Brightness temperature; Earth; Instruments; Microwave antennas; Microwave measurements; Pollution measurement; Radiometers; Satellite broadcasting; Temperature measurement; Altimetry; Environmental Satellite (Envisat); microwave radiometer; sidelobe;

fLanguage

English

Journal_Title

Geoscience and Remote Sensing, IEEE Transactions on

Publisher

ieee

ISSN

0196-2892

Type

jour

DOI

10.1109/TGRS.2006.887165

Filename

4106063