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Project Deliverable D50 Report on Best Practices ... - ESONET NoE

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Since September 2005:<br />

All the output off all sensors are readout every 3 minutes and stored in the<br />

database in a special “RawData” table.<br />

At the same time, a parser reads this table to fill different tables dedicated to<br />

each sensor, storing the data timestamp, the parameter values and the reference of<br />

the line from where it was extracted from the RawData table.<br />

The typical flow is of 12500 new lines in RawData table per hour (<strong>on</strong>e line per<br />

oceanographic sensor and other slow c<strong>on</strong>trol informati<strong>on</strong>).<br />

All these data are processed in quasi real time.<br />

Current procedure :<br />

− Each sensor was calibrated before deployment.<br />

− The acquisiti<strong>on</strong> of the oceanographical data is synchr<strong>on</strong>ized with the<br />

ANTARES acquisiti<strong>on</strong> data.<br />

− The data readout method depends <strong>on</strong> c<strong>on</strong>necti<strong>on</strong> type of the sensors :<br />

For most of the sensors, the c<strong>on</strong>necti<strong>on</strong> is d<strong>on</strong>e by a serial link RS232.<br />

For them, the data measurement and their recording is d<strong>on</strong>e by slow c<strong>on</strong>trol<br />

request.<br />

The IP camera and the seismometer have an aut<strong>on</strong>omous Ethernet<br />

c<strong>on</strong>necti<strong>on</strong>.<br />

The IODA has its own system of internal data acquisiti<strong>on</strong> and buffering.<br />

Those data are then send to shore by the Slow C<strong>on</strong>trol.<br />

<str<strong>on</strong>g>Deliverable</str<strong>on</strong>g> #50 - update October 2010 158

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