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"A new method of precise Jason‐2 altimeter calibration using a microwave transponder

Mertikas Stelios, W. Hausleitner

Απλή Εγγραφή


URIhttp://purl.tuc.gr/dl/dias/8F321666-69FD-4ABB-9A26-10816B41682F-
Αναγνωριστικόhttps://doi.org/10.1080/01490419.2012.718239-
Γλώσσαen-
Τίτλος"A new method of precise Jason‐2 altimeter calibration using a microwave transponderen
ΔημιουργόςMertikas Steliosen
ΔημιουργόςΜερτικας Στελιοςel
ΔημιουργόςW. Hausleitneren
ΔημιουργόςF. Moseren
ΔημιουργόςJ.-D. Desjonqueresen
ΔημιουργόςF. Boyen
ΔημιουργόςN. Picoten
ΔημιουργόςJ. Weingrillen
ΔημιουργόςA. Daskalakisen
ΕκδότηςTaylor & Francisen
ΠερίληψηThis study presents a new method of precise altimeter absolute calibration using a dedicated microwave transponder, which acts as an altimeter signal repeater that can be deployed at any sub-track position both in coastal regions and inland. The Austrian Academy of Sciences operates an altimeter transponder at the Gavdos calibration/validation facility located beneath a Jason cross-over point. We discuss the capabilities and strengths of the transponder technique in general and in the particular case of a dedicated calibration campaign carried out in 2011. For the accomplishment of this campaign, including 26 ascending and descending Jason-2 passes, the onboard Poseidon-3 altimeter had to be switched to the DIODE/DEM mode for every overflight. Four different methods have been developed to analyze the transponder generated waveforms, provided by S-IGDR and S-GDR products, respectively. The resulting biases of the altimetric ranges have proven to be stable (3 mm rms) and agree to a large extent among the proposed algorithms. However, the absolute bias value of 25.8 ± 0.3 cm derived from the transponder calibration technique shows a significant deviation of several centimeters compared with the ones resulting from conventional techniques. Possible causes of this behavior are under further investigation.en
ΤύποςPeer-Reviewed Journal Publicationen
ΤύποςΔημοσίευση σε Περιοδικό με Κριτέςel
Άδεια Χρήσηςhttp://creativecommons.org/licenses/by/4.0/en
Ημερομηνία2015-10-19-
Ημερομηνία Δημοσίευσης2012-
Βιβλιογραφική ΑναφοράHausleitner W., F. Moser, J.‐D. Desjonqueres, F. Boy, N. Picot, J. Weingrill, S. Mertikas, A. Daskalakis. "A new method of precise Jason‐2 altimeter calibration using a microwave transponder", Marine Geodesy, Vol. 35, No 1, pp:337-362 doi:10.1080/01490419.2012.718239en

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