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Proceedings Paper

Permanent facility for calibration/validation of satellite altimetry: GAVDOS
Author(s): Stelios P. Mertikas; Erricos C. Pavlis; Ilias N. Tziavos; Eftichios Koutroulis; Kirill Palamartchouk; Thanassis Papadopoulos; George S. Vergos
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Paper Abstract

An absolute sea-level monitoring and altimeter calibration permanent facility has been established on the isle of Gavdos, 50 km south of the island of Crete, Greece. This calibration/validation facility has been chosen because Gavdos is under a crossing point of the ground-tracks of Jason-1 satellite, and adjacent to an Envisat pass. Satellite altimeter missions are evaluated at that site using external measurements from tide gauges, GPS, a DORIS beacon, meteorological sensors, wave-height sensors, airborne campaigns for gravity and sea-surface topography, water-vapour radiometry, solar atmospheric spectrometry, GPS buoys, altimeter transponder, Satellite Laser Ranging, etc. The mean sea level and the earth's tectonic deformation field in the region have also been determined accurately. Comparison over the cycles 70 to 77 of the Jason-1 satellite indicate that its absolute mean bias for the sea-surface heights is 13 mm ± 20 mm. The GAVDOS project has started in December 2001 and has been in the context of an international calibration/validation effort of the Jason-1 Science Working Team.

Paper Details

Date Published: 16 November 2004
PDF: 12 pages
Proc. SPIE 5569, Remote Sensing of the Ocean and Sea Ice 2004, (16 November 2004); doi: 10.1117/12.566361
Show Author Affiliations
Stelios P. Mertikas, Technical Univ. of Crete (Greece)
Erricos C. Pavlis, NASA UMBC Joint Ctr. for Earth Systems Technology (United States)
Ilias N. Tziavos, Aristotle Univ. of Thessaloniki (Greece)
Eftichios Koutroulis, Technical Univ. of Crete (Greece)
Kirill Palamartchouk, Technical Univ. of Crete (Greece)
Thanassis Papadopoulos, Technical Univ. of Crete (Greece)
George S. Vergos, Aristotle Univ. of Thessaloniki (Greece)

Published in SPIE Proceedings Vol. 5569:
Remote Sensing of the Ocean and Sea Ice 2004
Charles R. Bostater Jr.; Rosalia Santoleri, Editor(s)

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