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Retrieval of land and sea brightness temperatures from mixed coastal pixels in passive microwave data

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7 Author(s)
T. Bellerby ; Centre for Remote Sensing, Bristol Univ., UK ; M. Taberner ; A. Wilmshurst ; M. Beaumont
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A technique is presented to separate uncontaminated land and sea brightness temperatures from mixed coastal pixels in 37-GHz vertically polarized passive microwave data from the Special Sensor Microwave Imager (SSM/I) instrument. Combining a mathematical model of the instrument response over several neighboring footprints with a GIS representation of the coastline yields a relationship between land and sea brightness temperatures and radiation measurements made at the satellite. Inverting this relationship allows separate land and sea brightness temperature values to be derived for each mixed coastal pixel in the original image. The technique has been successfully applied to 37-GHz vertically polarized SSM/I imagery for test areas covering the Gulf of Aden and the British Isles. Errors in the retrieved brightness temperatures were estimated to be of the order of 1-2 K

Published in:

IEEE Transactions on Geoscience and Remote Sensing  (Volume:36 ,  Issue: 6 )