Coastal-cabled observatory EMSO-Molène (MOLENE)

The seabed cabled observatory EMSO-Molène was deployed off shore 2 km north of Molène in the marine protected area “Iroise Marine Park”. MOLENE is an EMSO testing site at depth 18 meters, dedicated to sensors and equipment in-situ and long-term qualification. The instrumental module is a removable device that includes the electronic core of the observatory: the “Node” and the “Junction Box”. The Node inputs an optical signal and converts it into electrical. On the node output, the Junction Box relays instructions, collects data, protects the equipment in case of electrical malfunction and provides failure warnings. Remote control of the instruments and data recovery. Network throughput: 1 Gbit/s between the sensors and the relay station, restricted between the island and Brest. A land-based server transmits data to the subscriber. Data time stamping: GPS clock, NTP/PTP Network, Network Attached Storage. Available for the instruments: 6 identical inputs (Subconn MCBH12M, Micro Bulkhead, 12 contacts), voltage: 15V and 48V, power supplied for the 6 connections: 75 W under 15V and 75W under 48V. Seawater physico-chemical measurements are performed by the platforms on the site (high frequency sampling).