RETRIEVAL OF LAND AND SEA BRIGHTNESS TEMPERATURES FROM MIXED COASTAL PIXELS IN PASSIVE MICROWAVE DATA

Citation
T. Bellerby et al., RETRIEVAL OF LAND AND SEA BRIGHTNESS TEMPERATURES FROM MIXED COASTAL PIXELS IN PASSIVE MICROWAVE DATA, IEEE transactions on geoscience and remote sensing, 36(6), 1998, pp. 1844-1851
Citations number
14
Categorie Soggetti
Engineering, Eletrical & Electronic","Geochemitry & Geophysics","Remote Sensing
ISSN journal
01962892
Volume
36
Issue
6
Year of publication
1998
Pages
1844 - 1851
Database
ISI
SICI code
0196-2892(1998)36:6<1844:ROLASB>2.0.ZU;2-Y
Abstract
A technique is presented to separate uncontaminated land and sea brigh tness temperatures from mixed coastal pixels in 37-GHz vertically pola rized passive microwave data from the Special Sensor Microwave Imager (SSM/I) instrument. Combining a mathematical model of the instrument r esponse 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. Invert ing this relationship allows separate land and sea brightness temperat ure values to be derived for each mixed coastal pixel in the original image, The technique has been successfully applied to 37-GHz verticall y polarized SSM/I imagery for test areas covering the Gulf of Aden and the British Isles, Errors in the retrieved brightness temperatures we re estimated to be of the order of 1-2 K.