Selasa, 14 September 2010

Underwater Acoustic Modems for BSH/IOW MARNET Station

EvoLogics has announced a successful deployment of acoustic modems providing acoustic underwater communication to the environmental monitoring station of the Marine Environment Obs ervation Network (MARNET) of the Federal Maritime and Hydrographic Agency of Germany (BSH). Arkona, one of the Germany operated MARNET's monitoring stations, is using a wireless solution to retrieve data from the Acoustic Doppler Current Profiler (ADCP) for regular national and international assessments of the Baltic Sea state.

Autonomous Arkona station, operated on behalf of BSH by the Leibniz Institute for Baltic Sea Research Warnemuende (IOW), is located in highly-stratified shallow waters, an extremely harsh environment for subsea acoustic communication.

EvoLogics was challenged to provide reliable instant transmissions of the ADCP's hourly measurement results and to monitor the seafloor instrument's battery status, minimising overall energy consumption.
EvoLogics S2C R 48/78 acoustic modem units were installed, each equipped with an internal data-logger to prevent data loss and conserve energy when unable to transmit or receive data under unfavorable conditi ons of the acoustic channel.

Based on the patented S2C (Sweep-Spread Carrier) technology, EvoLogics S2CR acoustic modems have been deployed at the Arkona station for more than six months. Over this period, the data transmission was proven reliable and efficient. No data was lost, while only 30% of the seafloor unit's battery capacity was consumed by its components.

EvoLogics S2CR acoustic modems will continue operating at the Arkona station for another six months or more.

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