The 2013 Ibiza Calibration Campaign of Jason-2 and SARAL Altimeters

This study presents the results of the 2013 Ibiza (Western Mediterranean) calibration campaign of Jason-2 and SARAL altimeters. It took place from 14 to 16 September 2013 and comprised two phases: the calibration of the GNSS (Global Navigation Satellite System) buoys to estimate the antenna height o...

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Bibliographic Details
Published in:	Marine geodesy Vol. 38; no. sup1; pp. 219 - 232
Main Authors:	Frappart, F., Roussel, N., Biancale, R., Martinez Benjamin, J.J., Mercier, F., Perosanz, F., Garate Pasquin, J., Martin Davila, J., Perez Gomez, B., Gracia Gomez, C., Lopez Bravo, R., Tapia Gomez, A., Gili Ripoll, J., Hernandez Pajares, M., Salazar Lino, M., Bonnefond, P., Valles Casanova, I.
Format:	Journal Article Publication
Language:	English
Published:	Philadelphia Taylor & Francis 10-09-2015 Taylor & Francis Ltd
Subjects:	Altimeters Buoys Calibration Crossovers Earth Sciences Enginyeria civil Enginyeria de la telecomunicació Enginyeria hidràulica, marítima i sanitària Estimates Geodesy Geodèsia per satèl·lit Global navigation satellite system GNSS GNSS buoys Marine Measurement Navigation systems Ports i costes Radar Radiocomunicació i exploració electromagnètica satellite altimetry Satellite geodesy Satellites Satèl·lits i ràdioenllaços Sciences of the Universe Sea level Sistema de posicionament global tide gauge Àrees temàtiques de la UPC MED, Western Mediterranean 07800 Eivissa, Illes Balears, Espanya
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Summary:	This study presents the results of the 2013 Ibiza (Western Mediterranean) calibration campaign of Jason-2 and SARAL altimeters. It took place from 14 to 16 September 2013 and comprised two phases: the calibration of the GNSS (Global Navigation Satellite System) buoys to estimate the antenna height of each of them and the absolute calibration to estimate the altimeter bias (i.e., the difference of sea level measured by radar altimetry and GNSS). The first one was achieved in the Ibiza harbor at a close vicinity of the Ibiza tide gauge and the second one was performed at ∼ 40 km at the northwest of Ibiza Island at a crossover point of Jason-2 and SARAL nominal groundtracks. Five buoys were used to delineate the crossover region and their measurements interpolated at the exact location of each overflight. The overflights occurred two consecutive days: 15 and 16 September 2013 for Jason-2 and SARAL, respectively. The GNSS data were processed using precise point positioning technique. The biases found are of (−0.1 ± 0.9) and (−3.1 ± 1.5) cm for Jason-2 and SARAL, respectively.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0149-0419 1521-060X
DOI:	10.1080/01490419.2015.1008711