Modernisation of tide gauge at Ajaccio in the RONIM network Modernisation of tide gauge at Ajaccio in the RONIM network

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Modernisation of tide gauge at Ajaccio in the RONIM network

 

From 14 to 18 September 2009, two electronics technicians from the Naval Oceanography and Hydrography department (SHOM) went to Ajaccio in order to modernise the digital tide gauge that was installed in June 2000 inpartnership with the French Navy – the Mediterranean Maritime Region, and the Côte d'Azur Observatory (OCA).

View of the Ajaccio tide gaugeView of the Ajaccio tide gauge
Optiflex radar level sensorOptiflex radar level sensor

The OCA uses the data from this tide gauge in order to calibrate the altimetry satellite
Jason-2. (For more information on the benefit of this site, see the article by P.Exertier et al. in the AVISO No. 7 Newsletter entitled "Absolute altimetry calibration in Corsica").

An Optiflex telemetry radar has now replaced the ultrasonics telemetry that was fitted in June 2000. As before, the Optiflex system makes it possible to measure sea level every ten minutes and to send the data, following remote interrogation, to SHOM.

In contrast, a GPRS internet link can now also transmit the data in real time. The latter will contribute to the tsunami warning in the western Mediterranean and may be viewed on the Internet site "Sea level station monitoring facility" of the Intergovernmental Oceanographic Commission (IOC) (http://www.ioc-sealevelmonitoring.org/).