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

PressureSensorPressureSensor

PressureSensorPressureSensorHydrophone

Acoustic ModemAcoustic 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 FETCH100-6000 bpsUSBL compatible

Teledyne Benthos SM-75140-15,360 bits per sec dataModem/float/release

LinkQuest UWM 2000Up to 19,200 bps

WHOI MicroModem Tritech AM-300 Modem

Sensor ParametersPressure Sensor

• Power• Bandwidth• Cycle / sample rate• Estimated cost (range)• Possible vendors

Sensor ParametersHydrophone

• Power• Bandwidth• Cycle / sample rate• Estimated cost (range)• Possible vendors