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Agenda: Hi-level description of Ocean Observatories Initiative

Design of the OOI Global Nodes John Trowbridge (Woods Hole Oceanographic Institution) 17 December 2013. Agenda: Hi-level description of Ocean Observatories Initiative Hi-level description of Global platforms, spatial & temporal coverage, control, flow of power & comms

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Agenda: Hi-level description of Ocean Observatories Initiative

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  1. Design of the OOI Global NodesJohn Trowbridge (Woods Hole Oceanographic Institution)17 December 2013 • Agenda: • Hi-level description of Ocean Observatories Initiative • Hi-level description of Global platforms, spatial & temporal coverage, control, flow of power & comms • Lankhorst to follow with details siting, sensors, sampling

  2. Ocean Observatories Initiative (OOI) Components: Regional Scale Nodes Coastal & Global Scale Nodes Endurance Array Cyberinfrastructure Education & Public Engagement Schedule: Initiated Sep 2009 5.5 years Construction 25 years Operations Organization: NSF = Sponsor Ocean Leadership = Prime Implementing Organizations = Subs

  3. Baseline Global Array Schematic Glider Flanking Mooring Flanking Mooring Glider Glider Profiler Mooring SurfaceMooring

  4. Surface Mooring • Surface Buoy • Controller/logger: sampling and telemetry • Power controller: generation, storage and distribution • Power from solar/wind with rechargeable batteries • Fleet BroadBandsatellite communications • Meteorology, air & water PCO2, waves • Near-Surface Instrument Frame (15 m) • Secondary controller • Power from Surface Buoy • EM chain communications with Surface Buoy • Pumped CTD, fluorometer, point velocity • Riser • Internal battery power on sensors • Inductive communications of sensors with Surface Buoy • pH at two depths and CTD at multiple depths • Upward-looking ADCP at 500 m

  5. Profiler Mooring • Surface Piercing Profiler (top 150 m, 2 one-way per day) • Secondary controller, Internal battery power; Irridium satellite communications • Fluorometer, PCO2, DO, CTD, absorption, nitrate, irradiance • Proposed Plan B under review to replace Surface Piercing Profiler: Gliders + additional sensors on Surface Mooring • Subsurface Sphere (292 m) • Secondary controller • Internal battery power; inductive communications with Controller Cage • Upward-looking bio-acoustic sonar • Wire-Following Profiler (303 to 2616 m, 1 one-way per day) • Internal battery power; inductive communications with Controller Cage • Fluorometer, dissolved oxygen, CTD, velocity • Controller Cage (2620 m) • Controller • Internal battery power • Inductive communications with GSPP, Subsurface Sphere, Wire-Following Profiler • Acoustic communications with gliders

  6. Flanking Mooring • Subsurface Sphere (30 m) • Secondary controller • Internal battery power • Inductive communications with Controller Cage • Fluorometer, pH, dissolved oxygen • Riser • Internal battery power on sensors • Inductive comms sensors with Controller Cage • Fixed CTD at multiple depths, ADCP at 500 m • Controller Cage (1507 m) • Controller • Internal battery power • Inductive comms with Riser sensors and Subsurface Sphere • Acoustic communications with gliders

  7. Gliders • Sample to 1000 m on fixed paths around triangular mooring array • Acoustic communications with Flanking Moorings and Hybrid Profiling Mooring • Irridium satellite communications • Fluorometer, dissolved oxygen, CTD

  8. Baseline Global Array Schematic Glider Flanking Mooring Flanking Mooring Glider Glider Profiler Mooring SurfaceMooring

  9. Backup

  10. Sensors on Global Surface Mooring

  11. Sensors on Global Hybrid Profiler Mooring

  12. Sensors on Mesoscale Flanking Moorings

  13. Sensors on Gliders • 2-wavelength fluorometer • Dissolved oxygen • CTD

  14. Global Surface Piercing Profiler (GSPP) Plan B • GSPP to be removed from Hybrid Profiler Mooring. • 2 Gliders to perform as virtual mooring: • Carrying most sensors required for GSPP. • Test at Papa confirmed station-keeping, schedule-keeping, and vertical resolution meet L2 Science Requirements • Additional fixed sensors to be added to the buoy, the NSIF, and at 40, 80 and 130 m. • Critical Design Review Feb 2014.

  15. Conclusions of Glider as Virtual Mooring at Papa • Virtual mooring capability exists • Station-, schedule-keeping, and vertical resolution meet L2 Science Requirements • Site dependencies • Baseline energy estimate • Final sensor mix and power loads TBD • Require multiple platforms per site

  16. GSM Preliminary Conceptual Redesign Note: This conceptual design is preliminary, and will be detailed before the Critical Design Review (CDR) in February, 2014.

  17. Cost Estimates

  18. Additional Facts • GSM Power: • Given environmental conditions, expect average 100-150 W of power from wind and solar (variable over the course of the year). • Based on Pioneer I, expected SUMO power consumption ~ 80 W. • GSM Communications: Primary communications via Fleet BroadBand (INMARSAT). Rate ~ 100kbits/s. To send all data, ~160 MB per month (dependent on sampling strategy). • GSM Buoy Dimensions: Diameter ~ 10 ft, weight ~ 8500 lbs. • GWFP Power: 360 Ah batteries enable 1 one-way profile per day (800 km cumulative profiling distance). • Comms between WFPs and SIO Controller: 120 Bytes/s via inductive communication. • Comms between SIO Controller and Glider: 12-60 Bytes per second, depending on acoustic signal quality.

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