Envisat Ocean Altimetry Performance Assessment and Cross-calibration

Sensors

Yannice Faugere¹  Joël Dorandeu¹  Fabien Lefevre¹  Nicolas Picot² 

[1] Collecte Localisation Satellite (CLS), 8-10 rue Hermès, 31526 Ramonville St-Agne, France Tel : [phone], Fax : [phone], E-mails:;Centre National d'Etudes Spatiales (CNES), DCT/PO/AL BPI 2002, 18, Av. Edouard Belin 31401 Toulouse Cedex 9, France, E-mail:

关键词: altimetry;    calibration/validation;    sea level;   

DOI  :  10.3390/s6030100

来源: mdpi

【 摘 要 】

Nearly three years of Envisat altimetric observations over ocean are available in Geophysical Data Record (GDR) products. The quality assessment of these data is routinely performed at the CLS Space Oceanography Division in the frame of the CNES Segment Sol Altimétrie et Orbitographie (SSALTO) and ESA French Processing and Archiving Center (F-PAC) activities. This paper presents the main results in terms of Envisat data quality: verification of data availability and validity, monitoring of the most relevant altimeter (ocean1 retracking) and radiometer parameters, assessment of the Envisat altimeter system performances. This includes a cross-calibration analysis of Envisat data with Jason-1, ERS-2 and T/P. Envisat data show good general quality. A good orbit quality and a low level of noise allow Envisat to reach the high level of accuracy of other precise missions such as T/P and Jason-1. Some issues raised in this paper, as the gravity induced orbit errors, will be solved in the next version of GDR products. Some others, as the Envisat Mean Sea Level in the first year, still need further investigation.

【 授权许可】

Unknown   
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