FN Archimer Export Format
PT J
TI The GO4 Model in Near-Nadir Microwave Scattering From the Sea Surface
BT 
AF BOISOT, Olivier
   NOUGUIER, Frederic
   CHAPRON, Bertrand
   GUERIN, Charles-Antoine
AS 1:1,2;2:1;3:3;4:1;
FF 1:;2:PDG-ODE-LOPS-SIAM;3:PDG-ODE-LOS;4:;
C1 Aix Marseille Univ, Univ Toulon, CNRS, MIO,IRD,UM 110, F-83957 La Garde, France.
   Ctr Natl Etud Spatiales, Collecte Localisat Satellites, F-31400 Toulouse, France.
   IFREMER, Lab Oceanog Spatiale, F-29280 Plouzane, France.
C2 UNIV AIX MARSEILLE, FRANCE
   CNES, FRANCE
   IFREMER, FRANCE
SI BREST
SE PDG-ODE-LOPS-SIAM
   PDG-ODE-LOS
UM LOPS
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 3.36
TC 19
UR https://archimer.ifremer.fr/doc/00277/38789/37537.pdf
LA English
DT Article
DE ;Curvature;geometrical optics;near-nadir;ocean radar sensing;slope
AB We introduce a practical and accurate model, referred to as "GO4," to describe near-nadir microwave scattering from the sea surface, and at the same time, we address the issue of the filtered mean square slope (mss) conventionally used in the geometrical optics model. GO4 is a simple correction of this last model, taking into account the diffraction correction induced by the rough surface through what we call an effective mean square curvature (msc). We evaluate the effective msc as a function of the surface wavenumber spectrum and the radar frequency and show that GO4 reaches the same accuracy as the physical optics model in a wide range of incidence and frequency bands with the sole knowledge of the mss and msc parameters. The key point is that the mss entering in GO4 is not the filtered but the total slope. We provide estimation of the effective msc on the basis of classical sea spectrum models. We also evaluate the effective msc from near-nadir satellite data in various bands and show that it is consistent with model predictions. Non-Gaussian effects are discussed and shown to be incorporated in the effective msc. We give some applications of the method, namely, the estimation of the total sea surface mss and the recalibration of relative radar cross sections.
PY 2015
PD NOV
SO Ieee Transactions On Geoscience And Remote Sensing
SN 0196-2892
PU Ieee-inst Electrical Electronics Engineers Inc
VL 53
IS 11
UT 000359541100008
BP 5889
EP 5900
DI 10.1109/TGRS.2015.2424714
ID 38789
ER

EF