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Airborne Dual-Polarization Observations of the Sea Surface NRCS at C-Band in High Winds

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5 Author(s)
Sapp, J.W. ; Microwave Remote Sensing Lab., Univ. of Massachusetts, Amherst, MA, USA ; Frasier, S.J. ; Dvorsky, J. ; Chang, P.S.
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Airborne dual-polarization observations of sea surface normalized radar cross section (NRCS) were conducted over the North Atlantic during January-February 2011. Observations were made using the University of Massachusetts' Imaging Wind and Rain Airborne Profiler radar system installed on the National Oceanic and Atmospheric Administration's WP-3D research aircraft during several winter storm events to determine the high-wind response of the sea surface NRCS for both horizontal and vertical polarizations. During the flights, the aircraft performed several constant-roll circle maneuvers to allow collection of NRCS over a range of incidence angles. We find consistency with prior reports in the polarization ratio observed at moderate incidence angles at the winds encountered. For larger incidence angles, we observe a measurable decrease in polarization ratio with increasing wind speed.

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Geoscience and Remote Sensing Letters, IEEE  (Volume:10 ,  Issue: 4 )