At the end of January 2011, Cadden delivered to the Grand Port Maritime de Bordeaux (GPMB) a network of nine GNSS receivers in RTK mode via UHF link.
Composed of three dual-frequency stations and six mobiles from the Ashtech Proflex 500 range, this new device is intended to offer the bathymetry teams of the Grand Port Maritime de Bordeaux precise positioning throughout the approximately 150 km of the estuary of the Gironde, between the Port and the Atlantic.
Three technical strengths enabled specialist Cadden to win the call for tenders last June:
This proven functionality, unique to Ashtech receivers, remains unique in the market. Its principle: calculate the same position twice and simultaneously, but from two different reference stations. In the event of signal disturbance, switching from one measurement to another is immediate and transparent to the user, with the same level of precision. In addition, the centimeter Z of the RTK system will allow the Grand Port Maritime de Bordeaux to directly use “GPS tide” data.
Finally, thanks to the integrated web server, the system offers the possibility of controlling the reference stations remotely via IP from a simple PC: a “plus” that will prove to be very useful, even if it does not. was decisive in the final choice.
As soon as it goes into operation this month of March 2011, the new GNSS network will enable bathymetry work to be carried out with greater precision. It will thus serve two priority objectives of the Grand Port Maritime de Bordeaux: the quality and safety of maritime access.
This order complements the June 2010 order for four dual-frequency single-beam sounders, one of which was integrated by Cadden in a waterproof case.
The aim of the Shom was to equip its boats with a rapid survey kit in order to carry out bathymetric reconnaissance surveys on partially surveyed areas.
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Improve ILS measurements on the ground while controlling costs.
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