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Marina Martinez Garcia 1,2 , Juan Jose Martinez Benjamin 1 , Miquel Angel Ortiz Castellon 3 , Elena Tel 4 , Maria-Jesús Garcia 4 , Roman Leckzinsky 5 1 Technical University of Catalonia (UPC), Department of Geotechnical Engineering and Geosciences, Spain, marina@fa.upc.es

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  1. Marina Martinez Garcia1,2, Juan Jose Martinez Benjamin1,Miquel Angel Ortiz Castellon3, Elena Tel4, Maria-Jesús Garcia4, Roman Leckzinsky5 • 1 Technical University of Catalonia (UPC), • Department of Geotechnical Engineering and Geosciences, • Spain, marina@fa.upc.es • 2 Starlab Barcelona s.l., Spain, marina.martinez@starlab.es • 3 Cartographic Institute of Catalonia (ICC), Barcelona, Spain • 4 Instituto Nacional Oceanográfico (IEO), Spain • 5 Geónica Earth Sciences, Spain Contribution of l’Estartit tide gauge to the altimeter calibrations:Technology upgrades and new instruments

  2. Presentation L’Estartit gauge is a classical floating tide gauge set up in l’Estartit harbour (NE Spain) in 1990. 2007 Ocean Surface Topography Science Team Meeting

  3. Foundation of measurement at l’Estartit • Measurement: Relative Sea Level (geodeic mark at the harbor) by means of a float in a stilling well. • From the physics to the data: • 1.- The float is about 45cm diameter  large diameter to reduce errors in buoyancy due to friction of the gearing and small changes in the length of float wire. • 2.- The wire is coiled round a drum on the end of the gauge and another drum contains the counter balance wire. • 3.- The drum is geared to a slotted tape attached to a pen carriage which travels the chart during the rise and fall of the tide. 2007 Ocean Surface Topography Science Team Meeting

  4. New devices and sensors at l’Estartit • Radar tide gauge Datamar 3000C (Water level microwave sensor WLPULS-62)  possible connection of additional hydrological, meteorological or environmental sensors. • Thales Navigation Internet-Enabled GPS Continuous Geodetic Reference Station (iCGRS) System  with a choke ring antenna are working in simultaneously to the old installation. 2007 Ocean Surface Topography Science Team Meeting

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