FN Archimer Export Format
PT J
TI Ka-Band Dual Copolarized Empirical Model for the Sea Surface Radar Cross Section
BT 
AF YUROVSKY, Yury Yu
   KUDRYAVTSEV, Vladimir N.
   GRODSKY, Semyon A.
   CHAPRON, Bertrand
AS 1:1;2:1,2;3:3;4:4;
FF 1:;2:;3:;4:PDG-ODE-LOPS-SIAM;
C1 RAS, Fed State Budget Sci Inst, Inst Marine Hydrophys, Sevastopol 299011, Ukraine.
   Russian State Hydrometeorol Univ, Satellite Oceanog Lab, St Petersburg 195196, Russia.
   Univ Maryland, Dept Atmospher & Ocean Sci, College Pk, MD 20742 USA.
   Inst Francais Rech Exploitat Mer, F-29280 Plouzane, France.
C2 RUSSIAN ACAD SCI, UKRAINE
   UNIV RUSSIAN STATE HYDROMETEOROL, RUSSIA
   UNIV MARYLAND, USA
   IFREMER, FRANCE
SI BREST
SE PDG-ODE-LOPS-SIAM
UM LOPS
IN WOS Ifremer jusqu'en 2018
   copubli-int-hors-europe
   copubli-sud
IF 4.662
TC 36
UR https://archimer.ifremer.fr/doc/00377/48783/89822.pdf
LA English
DT Article
DE ;Capillary waves;cross section;radar backscattering;sea surface;wave breaking
AB This paper presents dual copolarized (PP) (VV and HH) Ka-band sea surface backscattering measurements taken from the Black Sea research platform at incidence angles ranging from 25 degrees to 65 degrees and in the wind speed range from 3 to 18 m/s. These measurements are corrected for radar antenna pattern and geometry of observations. The resulting normalized radar cross section (NRCS) is parameterized in a form of truncated azimuthal Fourier series with coefficients dependent on the incidence angle and wind speed. This dual PP empirical model (KaDPMod) is consistent with the Ku-band NSCAT-4 model. However, some remarkable differences are revealed. They are apparent when analyzed using a decomposition of VV and HH measurements into polarized Bragg backscattering (polarization difference, PD = VV-HH) and nonpolarized (NP) backscattering from breaking waves. The polarization difference (PD) has strong azimuth and wind dependencies, with the wind exponent ranging from 2.5 to 3. The saturation wave spectra derived from multifrequency PD (based on KaDPMod and Ku- and C-band empirical models) have a notable peak in the capillary-gravity range. The relative contribution of NP radar return to the Ka-band NRCS is significant. In the upwind direction, it reaches up to 60%-80% and 25%-50% for HH and VV, respectively. It is found that the NP wind exponent is lower than that for Bragg backscattering. Therefore, the relative contribution of the NP to Ka-band NRCS decreases with increasing wind speed at both polarizations. Such a behavior is the opposite of that observed in the Ku-band.
PY 2017
PD MAR
SO Ieee Transactions On Geoscience And Remote Sensing
SN 0196-2892
PU Ieee-inst Electrical Electronics Engineers Inc
VL 55
IS 3
UT 000396106700033
BP 1629
EP 1647
DI 10.1109/TGRS.2016.2628640
ID 48783
ER

EF