Expandable Seafloor Observatory OBSERVATORIO SUBMARINO EXPANDIBLE Expandable Seafloor Observatory

Main Research Fields Geology Biology Geophysics Meteorology Physical Processes Water Quality

System architecture 1 2 Power Supply Land Station up to 1500Vdc Node Power Supply 300Vdc Attached DC/DC converter 1500 to 300 Vdc Oceanographic Instruments 12 or 48 Vdc 1 2 Marine Hybrid cable: Copper tube at -1500Vdc (neg) Aluminum screen at 0Vdc (pos) parallel connection to ground OBSEA – Expandable Seafloor Observatory

Data Management Software Diagram Instruments transmit under UDP protocol Non-permanente data storage at the main node User and equipment configuration are stored in a Database Data is stored in a database at the land station Historical data through Internet with a web browser Real Time Data through custom application or Telnet OBSEA – Expandable Seafloor Observatory

System architecture / Oceanographic Sensors Initial Prototype First instruments: CTD (SBE 37 SMP) IP Camera (PIV 6732) Hydrophone (Bjørge Naxys Ethernet 02345) Maintenance: Every 6 months OBSEA – Expandable Seafloor Observatory

System architecture / Oceanographic Sensors Complete Node Possible future instruments Long period seismometer (Mark products LTD-4-3D) Short period Ocean Bottom Seismometer (OBS) CO2 sensor OBSEA – Expandable Seafloor Observatory

System architecture Control Diagram Autonomous Controller with microCLinux SNMP communication with Ground Station Constant monitoring of power, currents, temperatures, etc Power control of individual components and external ports Ground supervision, maintenance and emergency control OBSEA – Expandable Seafloor Observatory

Structure design / Operation and maintenance Top view Physical Structure Side view Designed for deployment at low depth (diver assisted) Protection for the main node Easy to transport and install OBSEA – Expandable Seafloor Observatory

Structure design / Operation and maintenance Physical Structure Designed for 300 meters depth Free space for future developments Up to 8 instrument ports 2 ports for trunk cable connection One subrack for 16 100 x 160mm PCB cards 150 watt redundant 1+1 power suply at 48Vdc 100 watt redundant 2+1 power supply at 12Vdc 1+1 redundant gigabit ethernet switch Main Cylinder OBSEA – Expandable Seafloor Observatory

Structure design / Operation and maintenance 5 kilometers of marine cable from Telefonica 1,5 kilometers of land optical cable from Telefonica 1,5 kilometers of land electrical cable from Prysmian Land installation by Abentel in june’08 Marine installation to be done by Tyco Marine Marine Cable Land Cable OBSEA – Expandable Seafloor Observatory

OBSEA Location Possible nodes in the protected area OBSEA – Expandable Seafloor Observatory

OBSEA observatory can be used as a test-bed for demo-mission sensors Contributions OBSEA observatory can be used as a test-bed for demo-mission sensors Integration of sensor interfaces based on the IEEE 1451.2 and Puck . Calibration of sensors before deployment as a certified lab by ISO/IEC 17025 norm.