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The ESA permanent facility for altimetry calibration: monitoring performance of radar altimeters for Sentinel-3A, Sentinel-3B and Jason-3 using transponder and sea-surface calibrations with FRM standards

Mertikas Stylianos, Tripolitsiotis Achilleas, Donlon Craig, Mavrocordatos Constantin, Féménias Pierre, Borde Franck, Frantzis Xenofon, Kokolakis Konstantinos, Guinle Thierry, Vergos, Georgios S, Tziavos, Ilias N, Cullen Robert

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URIhttp://purl.tuc.gr/dl/dias/0E1D5842-64C3-41DF-9B9A-2DD9FD81B679-
Identifierhttps://doi.org/10.3390/rs12162642-
Identifierhttps://www.mdpi.com/2072-4292/12/16/2642-
Languageen-
Extent39 pagesen
Extent17,41 megabytesen
TitleThe ESA permanent facility for altimetry calibration: monitoring performance of radar altimeters for Sentinel-3A, Sentinel-3B and Jason-3 using transponder and sea-surface calibrations with FRM standardsen
CreatorMertikas Stylianosen
CreatorΜερτικας Στυλιανοςel
CreatorTripolitsiotis Achilleasen
CreatorΤριπολιτσιωτης Αχιλλεαςel
CreatorDonlon Craigen
CreatorMavrocordatos Constantinen
CreatorFéménias Pierreen
CreatorBorde Francken
CreatorFrantzis Xenofonen
CreatorΦραντζης Ξενοφωνel
CreatorKokolakis Konstantinosen
CreatorΚοκολακης Κωνσταντινοςel
CreatorGuinle Thierryen
CreatorVergos, Georgios Sen
CreatorTziavos, Ilias Nen
CreatorCullen Roberten
PublisherMDPIen
Content SummaryThis work presents the latest calibration results for the Copernicus Sentinel-3A and -3B and the Jason-3 radar altimeters as determined by the Permanent Facility for Altimetry Calibration (PFAC) in west Crete, Greece. Radar altimeters are used to provide operational measurements for sea surface height, significant wave height and wind speed over oceans. To maintain Fiducial Reference Measurement (FRM) status, the stability and quality of altimetry products need to be continuously monitored throughout the operational phase of each altimeter. External and independent calibration and validation facilities provide an objective assessment of the altimeter’s performance by comparing satellite observations with ground-truth and in-situ measurements and infrastructures. Three independent methods are employed in the PFAC: Range calibration using a transponder, sea-surface calibration relying upon sea-surface Cal/Val sites, and crossover analysis. Procedures to determine FRM uncertainties for Cal/Val results have been demonstrated for each calibration. Biases for Sentinel-3A Passes No. 14, 278 and 335, Sentinel-3B Passes No. 14, 71 and 335, as well as for Jason-3 Passes No. 18 and No. 109 are given. Diverse calibration results by various techniques, infrastructure and settings are presented. Finally, upgrades to the PFAC in support of the Copernicus Sentinel-6 ‘Michael Freilich’, due to launch in November 2020, are summarized.en
Type of ItemPeer-Reviewed Journal Publicationen
Type of ItemΔημοσίευση σε Περιοδικό με Κριτέςel
Licensehttp://creativecommons.org/licenses/by/4.0/en
Date of Item2021-06-18-
Date of Publication2020-
SubjectSatellite altimetryen
SubjectCopernicus Sentinel-3en
SubjectCalibrationen
SubjectFiducial reference measurementsen
SubjectTransponderen
SubjectSea surfaceen
SubjectUncertainty analysisen
SubjectCreteen
Bibliographic CitationS. Mertikas, A. Tripolitsiotis, C. Donlon, C. Mavrocordatos, P. Féménias, F. Borde, X. Frantzis, C. Kokolakis, T. Guinle, G. Vergos, I. Tziavos, and R. Cullen, “The ESA permanent facility for altimetry calibration: monitoring performance of radar altimeters for Sentinel-3A, Sentinel-3B and Jason-3 using transponder and sea-surface calibrations with FRM standards,” Remote Sens., vol. 12, no. 16, Aug. 2020. doi: 10.3390/rs12162642 en

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