FN Archimer Export Format
PT J
TI Assessment of SARAL/AltiKa Wave Height Measurements Relative to Buoy, Jason-2, and Cryosat-2 Data
BT 
AF HITO SEPULVEDA, Hector
   QUEFFEULOU, Pierre
   ARDHUIN, Fabrice
AS 1:1;2:2;3:2,3;
FF 1:;2:PDG-ODE-LOS;3:;
C1 Univ Concepcion, Dept Geophys, Concepcion, Chile.
   IFREMER, Lab Oceanog Spatiale, F-29280 Plouzane, France.
   CNRS Ifremer UBO IRD, UMR 6523, Lab Phys Oceans, Brest, France.
C2 UNIV CONCEPCION, CHILE
   IFREMER, FRANCE
   CNRS, FRANCE
SI BREST
SE PDG-ODE-LOS
UM LOPS
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-int-hors-europe
   copubli-sud
IF 0.979
TC 66
UR https://archimer.ifremer.fr/doc/00286/39675/38199.pdf
LA English
DT Article
DE ;Radar altimeter;significant wave height;satellite;SARAL;AltiKa;validation
AB SARAL/AltiKa GDR-T are analyzed to assess the quality of the significant wave height (SWH) measurements. SARAL along-track SWH plots reveal cases of erroneous data, more or less isolated, not detected by the quality flags. The anomalies are often correlated with strong attenuation of the Ka-band backscatter coefficient, sensitive to clouds and rain. A quality test based on the 1Hz standard deviation is proposed to detect such anomalies. From buoy comparison, it is shown that SARAL SWH is more accurate than Jason-2, particularly at low SWH, and globally does not require any correction. Results are better with open ocean than with coastal buoys. The scatter and the number of outliers are much larger for coastal buoys. SARAL is then compared with Jason-2 and Cryosat-2. The altimeter data are extracted from the global altimeter SWH Ifremer data base, including specific corrections to calibrate the various altimeters. The comparison confirms the high quality of SARAL SWH. The 1Hz standard deviation is much less than for Jason-2 and Cryosat-2, particularly at low SWH. Furthermore, results show that the corrections applied to Jason-2 and to Cryosat-2, in the data base, are efficient, improving the global agreement between the three altimeters.
PY 2015
PD SEP
SO Marine Geodesy
SN 0149-0419
PU Taylor & Francis Inc
VL 38
IS Suppl.1
UT 000362123500031
BP 449
EP 465
DI 10.1080/01490419.2014.1000470
ID 39675
ER

EF