Physics
Scientific paper
Aug 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21.1715h&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 21, no. 16, p. 1715-1718
Physics
5
Atmospheric Correction, Error Analysis, Remote Sensing, Satellite Observation, Sea Surface Temperature, Temperature Measurement, Wind Effects, Wind Velocity, Algorithms, Brightness Temperature, Error Correcting Codes, Ers-1 (Esa Satellite), Ocean Data Acquisitions Systems, Radiometers, Satellite Instruments
Scientific paper
The effect of windspeed on water emissivity, while being negligible around normal incidence, becomes significant above angles of about 50 deg. We calculate the effect of windspeed on retrieved sea surface temperature and show that errors become significant for potentially very accurate Along Track Scanning Radiometer (ATSR, carried on board ESA's first remote sensing satellite, ERS-1) since brightness temperatures measured at approximately equal 56 deg, as well as those measured at nadir, are used to provide improved atmospheric corrections. We show that when a sea surface temperature (SST) retrieval algorithm generated assuming zero windspeed is applied to brightness temperatures calculated for windspeeds of 5, 10 and 15 m/s, a potential error of up to 0.4 K is introduced. Since coincident windspeed data can be obtained from the ERS-1 radar altimeter, accurate correction can be made for this effect and we provide a preliminary algorithm for the correction of ATSR SST data.
Brown Jason S.
Harris Robert A.
Mason I. M.
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