Institutional Repository
Technical University of Crete
Technical University of Crete
EN
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EL
| URI | http://purl.tuc.gr/dl/dias/8F321666-69FD-4ABB-9A26-10816B41682F | - |
| Identifier | https://doi.org/10.1080/01490419.2012.718239 | - |
| Language | en | - |
| Title | "A new method of precise Jason‐2 altimeter calibration using a microwave transponder | en |
| Creator | Mertikas Stelios | en |
| Creator | Μερτικας Στελιος | el |
| Creator | W. Hausleitner | en |
| Creator | F. Moser | en |
| Creator | J.-D. Desjonqueres | en |
| Creator | F. Boy | en |
| Creator | N. Picot | en |
| Creator | J. Weingrill | en |
| Creator | A. Daskalakis | en |
| Publisher | Taylor & Francis | en |
| Content Summary | This 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 |
| Type of Item | Peer-Reviewed Journal Publication | en |
| Type of Item | Δημοσίευση σε Περιοδικό με Κριτές | el |
| License | http://creativecommons.org/licenses/by/4.0/ | en |
| Date of Item | 2015-10-19 | - |
| Date of Publication | 2012 | - |
| Bibliographic Citation | Hausleitner 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:10.1080/01490419.2012.718239 | en |
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