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| Hito Sepulveda, Hector; Queffeulou, Pierre; Ardhuin, Fabrice. |
| 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... |
| Tipo: Text |
Palavras-chave: Radar altimeter; Significant wave height; Satellite; SARAL; AltiKa; Validation. |
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00286/39675/38199.pdf |
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