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Puget Sound Tow CTD chain Test January 4, 2011

Puget Sound Tow CTD chain Test January 4, 2011 . Participants: Scientist : Frank Henyey, Barry Ma Captain : Eric Boget Engineer : Tim McGinnis, Tim Wen , Nicolas Michel-Hart SBE expert: Joel Reiter, Robin Clifford. TOWSBE. Tow chain system with inductive SBE microCATS

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Puget Sound Tow CTD chain Test January 4, 2011

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  1. Puget Sound Tow CTD chain TestJanuary 4, 2011 • Participants: • Scientist : Frank Henyey, Barry Ma • Captain : Eric Boget • Engineer : Tim McGinnis, Tim Wen, Nicolas Michel-Hart • SBE expert: Joel Reiter, Robin Clifford

  2. TOWSBE • Tow chain system with inductive SBE microCATS • Steel armored cable (long-line fishing proof). • Real time inductive queries • Internal recording • Adjustable sensor amount and depth • Attachable Fairing system LabView interface

  3. Puget Sound Trial January 4, 2011 Electronic housing 15meter interval SBE37IM x8 UIMM 150 m armored coax sea-cable 80m Fairings Fairing reduce drag and strumming New clamp design Swing with flow UIMMx1 Depressor

  4. January 4, 2011 TOWSBE Puget Sound Trial query 1 query 2 • 8 SBE 37 IM sensors (C, T, P) with 150m armored cable • SBE sampling interval 10s, query 1 period: dn20 /3min, query2: dn10/3min • Towing speed 1~ 4 kts • Upper and lower boundaries mark the instrument depth • Black dots indicate near real-time data query during the Puget Sound Trial.

  5. January 4, 2011 TOWSBE Puget Sound Trial Detail Ocean Structure Reviewed

  6. TOWSBE Puget Sound trial results • New clamp designs ensured the micorCATs swing freely • Armored sea cable has good inductive character for data transmission and also prevent potential damage from long-line fishing. • Ship speed over 4 kts affect inductive transmission. More query errors occurred. Possible caused by the cable strumming due to the upper 70m without fairings during the Puget Sound trial. • SBE37 IM #1 and #2 (top two sensors ) have more query errors (cable strumming? loaner units? older IMM model? without pump?) • microCATs internal recordings data are good. High resolution downloaded after TOWSBE recovery • Little flow effect observed on the microCATs conductivity data (need to further verify). • LabView interface and Matlab near real-time processing are tested. Data: SBE raw and Queried http://kirin.apl.washington.edu/~barry/TOWSBE_0104_2011/data/ Cable strumming video http://kirin.apl.washington.edu/~barry/TOWSBE_0104_2011/movie/Strumming0104.AVI

  7. IWISE Field Program TOWSBE Spec • 800m armored sea cable • Fully faired • ~ 40 microCATs sensors • ~10 HOBO U10 loggers • 3-4 kts towing speed • High resolution T,C,P data internal recording • Real time inductive query for assessing ocean condition

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