1. February 2005SSPARRLDEO/Instrument Lab 1 Fulfills need for seafloor depth measurements in areas not visited by ships, such as: –Arctic Ocean –Southern Ocean –Southern Pacific and Indian Oceans NSF funded prototype SSPARR buoy is an expendable device, deployable in open ocean or ice with target 5 year lifespan Modular components can be integrated with other buoys Expandable to use as an aid to navigation for under-ice vehicles Seafloor Sounding in Polar and Remote Regions (SSPARR) Concept

2. February 2005SSPARRLDEO/Instrument Lab 2 Modular System Concept

3. February 2005SSPARRLDEO/Instrument Lab 3 Buoy Control/Telemetry Module –Iridium Short Burst Data –Data Acquisition/Archiving & Control Sys. –May be floating or through-ice Electromechanical Tether –Oil-filled hydraulic hose protects from ice damage –Integral electrical conductors Depth Sounder Module –Nominal 20m depth to reduce ice damage, surface bubbles, cavitation –Internal power supply for 5 year lifetime –Energy output dependent on expected seafloor depth Seafloor Sounding in Polar and Remote Regions (SSPARR)

4. February 2005SSPARRLDEO/Instrument Lab 4 Preliminary Data Sample

5. February 2005SSPARRLDEO/Instrument Lab 5 Detected Bottom Moving Average First Difference Bottom Detection Algorithm of TracEd System, Dijkstra, S.J., Software Tools Developed for Seafloor Classification, PhD Dissertation, University of New Brunswick, Fredericton, NB Canada, November 1999 ITC 3013 Transducer 197dB Source Level 2150m Water Depth

6. February 2005SSPARRLDEO/Instrument Lab 6 Measured Transducer Characteristics

7. February 2005SSPARRLDEO/Instrument Lab 7 Bob Anderson, SAIC andersonrm@saic.com andersonrm@saic.com Dale Chayes, LDEO dale@ldeo.columbia.edu dale@ldeo.columbia.edu Mark Rognstad, HMRG/UH markr@soest.hawaii.edu markr@soest.hawaii.edu Larry Mayer, UNH larry.mayer@unh.edu larry.mayer@unh.edu Contacts