Modulation of Ka-Band Doppler Radar Signals Backscattered From the Sea Surface

Modulation of Ka-Band Doppler Radar Signals Backscattered From the Sea Surface

This paper presents dual copolarized (VV and HH) Ka-band radar measurements of joint modulation of normalized radar cross section (NRCS) and Doppler velocity (DV) performed from a sea research platform. NRCS and DV modulations are well correlated. NRCS modulations exhibit a spiky structure. HH modul...

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Veröffentlicht in:IEEE transactions on geoscience and remote sensing 2018-05, Vol.56 (5), p.2931-2948
Hauptverfasser: Yurovsky, Yury Yu, Kudryavtsev, Vladimir N., Chapron, Bertrand, Grodsky, Semyon A.
Format: Artikel
Sprache:eng
Schlagworte:
Backscattering
Doppler effect
Doppler radar
Doppler shift
Doppler sonar
Fluid dynamics
Fluid flow
Hydrodynamics
Incidence angle
Modulation
Modulation transfer function
modulation transfer function (MTF)
Optical communication
Parameterization
Polarization
Polynomials
Radar
radar backscattering
Radar cross sections
Sciences of the Universe
Sea surface
Spaceborne radar
spikes
Surface waves
Temperature
Temperature (air-sea)
Wave breaking
Waves
Wind speed
Winds
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Zusammenfassung:This paper presents dual copolarized (VV and HH) Ka-band radar measurements of joint modulation of normalized radar cross section (NRCS) and Doppler velocity (DV) performed from a sea research platform. NRCS and DV modulations are well correlated. NRCS modulations exhibit a spiky structure. HH modulations are stronger than VV ones leading to modulations of the polarization ratio. This suggests that an important portion of NRCS modulations is produced by nonpolarized radar returns from modulated wave breaking facets. DV modulations reveal that at incidence angles
ISSN:0196-2892
1558-0644
DOI:10.1109/TGRS.2017.2787459