1. Expandable Seafloor Observatory
OBSERVATORIO
SUBMARINO
EXPANDIBLE
Expandable Seafloor Observatory

2. Main Research Fields Geology Biology Geophysics Meteorology
Physical Processes
Water Quality

3. 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

4. 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

5. 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

6. 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

7. 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

8. 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

9. 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 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

10. 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

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

12. 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 and Puck .
Calibration of sensors before deployment as a certified lab by ISO/IEC norm.