NDLI: Influence from polarized galactic background noise on L-band measurements of the sea surface salinity

Content Provider	IEEE Xplore Digital Library
Author	Sobjaerg, S.S. Skou, N.
Copyright Year	2004
Description	Author affiliation: Electromagn. Syst., Tech. Univ. Denmark, Lyngby, Denmark (Sobjaerg, S.S.; Skou, N.)
Abstract	The polarimetric EMIRAD radiometer, based on novel digital down conversion and detection techniques, has been installed on a C-130 aircraft from the Royal Danish. Air Force during the L-band Ocean Salinity Airborne Campaign (LOSAC) in 2001 and 2003. Full 360/spl deg/ circle flight patterns around the same target area as well as clover leaf patterns have been measured, and both provide an azimuth signature of the ocean at a constant incidence angle. The resulting azimuth signatures show significant variations in all the three first Stokes parameters, and a correlation is found between the downwelling galactic background signal and the measured results. The measured 3/sup rd/ Stokes parameter has variations of the same order of magnitude as the two linear polarizations, and to verify this result, an experiment for direct observation of the sky over long time is set up. This experiment confirms the presence of a polarized galactic background signal, and conclusions are made with respect to the necessity for polarimetric corrections in future measurements over the sea at L-band.
Starting Page	1354
Ending Page	1357
File Size	450613
Page Count	4
File Format	PDF
ISBN	0780387422
DOI	10.1109/IGARSS.2004.1368669
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-09-20
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Polarization Background noise L-band Sea measurements Noise measurement Sea surface salinity Azimuth Stokes parameters Radiometry Aircraft
Content Type	Text
Resource Type	Article

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