Absolute calibration of the SARAL/AltiKa satellite altimeter using the permanent facility on Gavdos, Greece

Stelios Mertikas (Technical University of Crete, Greece)


Antonis Daskalakis (Space Geomatica Ltd., Greece); Ilias Tziavos (Aristotle University of Thessaloniki, Greece); George Vergos (Aristotle University of Thessaloniki, Greece); Vasilis Zervakis (University of the Aegean, Greece)

Event: 2014 SARAL/AltiKa workshop

Session: Calval over ocean / In situ Calval

Presentation type: Type Poster

This work presents the latest calibration results for the SARAL/AltiKa satellite altimeter, conducted by the Gavdos/Crete permanent facility. Results are reported using sea-surface calibration techniques along the ascending Pass No.57. Calibration starts even at 20 km south of Gavdos and from cycle No.1 (as of 3-April-2013) till today. Three GNSS receivers along with four tide gauges of different type, precise local geoid models, with mean dynamic topography models have been used for this satellite calibration. Sampling rate data for the range and the altitude at 40Hz has been applied. Finally, the wet troposphere and ionosphere delays as measured by the satellite are compared against in situ measurements.
Stelios Mertikas
Technical University of Crete