FN Archimer Export Format
PT J
TI Calibration of the Normalized Radar Cross Section for Sentinel-1 Wave Mode
BT 
AF LI, Huimin
   Mouche, Alexis
   Stopa, Justin E.
   Chapron, Bertrand
AS 1:1,2;2:1;3:3;4:1;
FF 1:PDG-ODE-LOPS-SIAM;2:PDG-ODE-LOPS-SIAM;3:;4:PDG-ODE-LOPS-SIAM;
C1 Univ Brest, Lab Oceanog Phys & Spatiale, Inst Francais Rech Exploitat Mer, CNRS,IRD,IUEM, F-29280 Brest, France
   UBL, IMT Atlantique, Lab STICC, F-29238 Brest, France
   Univ Hawaii Manoa, Dept Ocean Resources & Engn, Honolulu, HI 96822 USA
C2 IFREMER, FRANCE
   IMT ATLANTIQUE, FRANCE
   UNIV HAWAII MANOA, USA
SI BREST
SE PDG-ODE-LOPS-SIAM
UM LOPS
IN WOS Ifremer UMR
   copubli-france
   copubli-int-hors-europe
IF 5.855
TC 11
UR https://archimer.ifremer.fr/doc/00457/56882/59006.pdf
LA English
DT Article
DE ;CMOD5.N;radiometric calibration;Sentinel-1A (S-1A);Wave mode (WV)
AB Sentinel-1 (S-1) is a two-satellite constellation for continuity of operational synthetic aperture radar (SAR) observations. Wave mode (WV) is the default mode over open ocean for S-1 to monitor global ocean waves and wind field. Therefore, proper radiometric calibration is essential to accurately infer these geophysical quantities. Based on the global data set acquired by S-1A WV, assessment of normalized radar cross section (NRCS) is carried out through comparison with CMOD5.N predictions over open ocean. The calibration accuracy quantified by NRCS residuals between SAR measurements and CMOD5.N demonstrates distinct features for two incidence angles (23.8° and 36.8°). Particularly, NRCS at 23.8° is overall consistent with CMOD5.N, while NRCS at 36.8° displays great deviation. Two recalibration methods are then implemented by examining the backscattering profile over Amazon rain forest and ocean calibration. Both methods show the necessity for recalibration and obtain comparable correction factors for WV1 and WV2, respectively. The NRCS residuals by applying both methods are significantly reduced toward zero. By comparison, ocean calibration is more efficient and practical to implement. 
PY 2019
PD MAR
SO Ieee Transactions On Geoscience And Remote Sensing
SN 0196-2892
PU Institute of Electrical and Electronics Engineers (IEEE)
VL 57
IS 3
UT 000460321300023
BP 1514
EP 1522
DI 10.1109/TGRS.2018.2867035
ID 56882
ER

EF