Concepts for Integrating Ocean Science Sensors on Submarine Cables

Science Drivers (What’s it good for?) Tsunami detection and detail Sea floor movement Seismic event detection Mammal monitoring Expansion – interconnection to autonomous platforms and arrays

Direct and Indirect Connectivity Imbedded Sensors (at Repeater) Communication with other Sensor Platforms – Gliders – AUVs – Other Indirect power

Science on Cables Pressure Sensor Pressure Sensor Pressure Sensor Pressure Sensor Hydrophone Acoustic Modem Cable Repeater

Possible Acoustic Underwater Network Master Node connected to cabled infrastructure for near-real-time data transfer Network detects ranges between neighbor nodes – becomes an indicator of seafloor movements Add moorings for 3-D “sensor cloud” One or more sensors interfaced to each node Provide an acoustic interface (and positioning) for mobile platforms

Acoustic Hardware Sonardyne FETCH bps USBL compatible Teledyne Benthos SM ,360 bits per sec data Modem/float/release LinkQuest UWM 2000 Up to 19,200 bps WHOI MicroModem Tritech AM-300 Modem

Sensor Parameters Pressure Sensor Power Bandwidth Cycle / sample rate Estimated cost (range) Possible vendors

Sensor Parameters Hydrophone Power Bandwidth Cycle / sample rate Estimated cost (range) Possible vendors