FN Archimer Export Format PT J TI Compact Polarimetry Synthetic Aperture Radar Ocean Wind Retrieval: Model Development and Validation BT AF ZHANG, Biao LU, Yiru PERRIE, William ZHANG, Guosheng MOUCHE, Alexis AS 1:1,2,3;2:1;3:3;4:1,2;5:4; FF 1:;2:;3:;4:;5:PDG-ODE-LOPS-SIAM; C1 Nanjing Univ Informat Sci & Technol, Sch Marine Sci, Nanjing, Peoples R China. Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai, Peoples R China. Fisheries & Oceans Canada, Bedford Inst Oceanog, Dartmouth, NS, Canada. Univ Brest, Lab Oceanog Phys & Spatiale, CNRS, IFREMER,IRD, Brest, France. C2 UNIV NANJING, CHINA SOUTHERN MARINE SCI ENGN GUANGDONG LAB ZHUHAI, CHINA MPO BEDFORD INST OCEANOG, CANADA IFREMER, FRANCE SI BREST SE PDG-ODE-LOPS-SIAM UM LOPS IN WOS Ifremer UMR copubli-int-hors-europe copubli-sud IF 2.531 TC 4 UR https://archimer.ifremer.fr/doc/00697/80912/84741.pdf LA English DT Article DE ;Ocean;Wind;Algorithms;Remote sensing AB We have developed C-band compact polarimetry geophysical model functions for RADARSAT Constellation Mission ocean surface wind speed retrieval. A total of 1594 RADARSAT-2 images acquired in quad-polarization SAR imaging mode were collocated with in situ buoy observations. This dataset is first used to simulate compact polarimetric data and to examine their dependencies on radar incidence angle and wind vectors. We find that right circular transmit, right circular receive (RR-pol) radar backscatters are less sensitive to incidence angles and wind directions but are more dependent on wind speeds, compared to right circular transmit, horizontal receive (RH-pol), right circular transmit, vertical receive (RV-pol), and right circular transmit, left circular receive (RL-pol). Subsequently, the matchup data pairs are used to derive the coefficients of the transfer functions for the proposed compact polarimetric geophysical model (CMOD) functions, and to validate the associated wind speed retrieval accuracy. Statistical comparisons show that the retrieved wind speeds from CMODRH, CMODRV, CMODRL, and CMODRR are in good agreement with buoy measurements, with root-mean-square errors of 1.38, 1.51, 1.47, and 1.25 m s(-1), respectively. The results suggest that compact polarimetry is a good alternative to linear polarization for wind speed retrieval. CMODRR is more appropriate to retrieve high wind speeds than CMODRH, CMODRV or CMODRL. PY 2021 PD APR SO Journal Of Atmospheric And Oceanic Technology SN 0739-0572 PU Amer Meteorological Soc VL 38 IS 4 UT 000644157500004 BP 747 EP 757 DI 10.1175/JTECH-D-20-0035.1 ID 80912 ER EF