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Naval Oceanographic Office (NAVOCEANO)

Naval Oceanographic Office (NAVOCEANO). Changes in Multibeam Operations and Applications Presented by David H. Fabre. Outline. Past MB History, Capability, Error Analysis, CRADAs, Training Future Justifiable cost for benefit Attribution of Nav products Mobile Training Team

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Naval Oceanographic Office (NAVOCEANO)

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  1. Naval Oceanographic Office(NAVOCEANO) Changes in Multibeam Operations and Applications Presented by David H. Fabre

  2. Outline • Past • MB History, Capability, Error Analysis, CRADAs, Training • Future • Justifiable cost for benefit • Attribution of Nav products • Mobile Training Team • Automation/Fusion • Open Questions (Non-hydro depts)

  3. Past - NAVO Multibeam History • Multibeam in use since 1967 (SASS,Seabeam,Botas) • In early 1990s, EM100s on T-AGS 51s • EM950 on ORCAs • In 1996, USNS Pathfinder T-AGS 60, with EM950 and EM121a did first surveys • EM1002s replace EM950s • EM3000s replaced singlebeam on HSLs • Reson 8101s, 8125 used by HYCOOP & FST

  4. Past - High Resolution Capability • Capability expanded with high resolution multibeams • Can now get “full coverage” (wrt singlebeam) that meets requirements with towed sidescan • Question: will MB coverage ever obviate sidescan?

  5. Past - Error Analysis • Multiple methods of errors analysis • Backward • Ground truthing areas to build up confidence, beam statistics • Michaelson Test Area (MTA), “Testin’ in Destin”, Flower Garden Banks • Residual analysis on grid basis • Cross-check analysis for field sanity checks • Forward • Error Budgets for planning (Hare TPE methods) • Beam-wise 95% TPE confidence values in realtime and post-time

  6. Past - Software CRADAs • To address the problem of “too much data” have software CRADAs • Based on PFM format • (Will eventually have GSF->PFM->BAG: collection->working->product formats) • Has increased throughput and saved resources • Still have problem of “not enough data” for most global product needs (< 10% of oceans surveyed)

  7. Past - Training • Estimate 37% workforce formally trained (where the number used to be 1%) • NAVO was ~215/1345=16% of MBC attendees • Hydro currently 98% MBC-ized (of ~130) • Effect is decreased re-working, higher quality, lower costs • “good - fast - cheap”

  8. Future - Justifiable cost for benefit • “Why do you need that multibeam?” • “What’s your ROI for that multibeam?” • “Is it worth having a very expensive multibeam?” • Questions we must constantly answer. Need for some quantifiable metrics … perhaps.

  9. Future – Attribution of Nav products • Not just for nautical charting • Working on getting the answer to “How good is your data?” as part of the product • PFM_CUBE -> BAG -> “products” • ECDIS is not just depths anymore • Idea in “Chart of the future”

  10. Future - Automation/Fusion • Have non-traditional sources of info. • Lidar, Derived Bathy, other Through-the-sensor data, random data • How do we fuse them together? • Can we make this automatic?

  11. Mobile Training Team • NAVO’s HYCOOP provide formal customized on-the-job training to host countries • Potential opportunity for “Fab 4” or “Disciples” to provide assistance as expert consultants • POC – Stan Harvey

  12. Open MIW/Engineering Questions • MIW Question: will multibeam ever be able to answer questions about clutter, roughness, and mine burial probability the way sidescan is used now? • Eng. Q: will it be possible to increase the repetition rate even for deeper sonars?

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