UMSFTF Hydrophone Array

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UM/SFTF Hydrophone Array

• 28 Feb 2001 at Seatech
• N. J. Williams, H. A. DeFerrari,
• and H. B. Nguyen
• University of Miami

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Outline

• Current installation
• Construction
• Deployment
• Operational specifications
• Budgetary estimates
• Future plans

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Current Installation
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Array End Connectors
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Hydrophone Breakout
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Final Steps
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Deployments

• TONGS
• Site hardening and initial splice
• Ethernet switch and main platform
• Horizontal arrays and pingers
• Vertical array and pinger
• Acoustic Sources and thermistor arrays for
  experiments

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Television Observed Nautical Grappling System

• TONGS van and portable unit allows deployment
  from a variety of research vessels
• Able to deploy and recover up to 6000 (2727 kg)
  payloads

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Junction housing
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Ethernet Switch Installation
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Receiver and Pinger
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Vertical Array
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(No Transcript)
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Miami Sound Machine
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Array Operational Specifications

• Vertical array has 105 m aperture with 32
  non-linear spaced hydrophones
• 10000 B.S. Kevlar strength member and 3/8
  Jacketed w.r. in parallel
• Anti-Strum fairing
• 18 TSP cable x 2 per array
• all connectors MAW-2-HC (Seacon)

• 3000 top buoy , pressure sensor (0-150 psi)
• Bottom arrays have 480 m aperture with 32
  non-linear spaced phones each (x2)
• Pinger system allows for real-time spatial
  positioning of phones
• max BW 20 Hz to 25 kHz
• sens -178 dB // uPa

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Rough Budgetary Estimates

• Hydrophones (in quantity) approx 600/ea (700/ea
  calibrated at Dodge Pond )
• Hyd connectors, potting, housings, etc. 100/ea
• cabling 15/m
• 32 channel receiver 8K/ea (housing, connectors,
  etc-mech only, no electronics)
• Pingers (4K/ea with tuning)

• Using these numbers our 500 m bottom array would
  cost approx. 45K in materials to build labor
• This does not include F/O cables or connectors,
  except for the one on the receiver housing
• Typical F/O connector cost is 3500 for a CCP
  with 3 fibers and 3 copper conductors
• Typical 18/m USED small q, prob 27/m new (10 km
  min)

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Future Plans

• Immediate goal is to perform experiments with
  Vertical Array
• Would like to get a horizontal leg functioning
  east of Vertical Array
• In theory, could put in another ethernet switch
  off East array f/o cable end and deploy 2 or more
  arrays on bottom