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Upgrading L’Estartit Tide Gauge for Enhanced Altimeter Calibration

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This presentation discusses the advancements made to the L’Estartit tide gauge since its establishment in 1990. Originally designed to measure relative sea level using a float mechanism, the gauge has undergone significant technological upgrades. Key enhancements include the addition of the Datamar 3000C radar tide gauge and the installation of the Thales Navigation iCGRS system. These improvements facilitate the integration of hydrological, meteorological, and environmental sensors, thereby bolstering the accuracy and reliability of sea level measurements essential for altimeter calibrations.

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Upgrading L’Estartit Tide Gauge for Enhanced Altimeter Calibration

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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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