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Sentinel V ADCP - In Search of the Perfect Wave Presented By: Aaron Robertson and Darryl Symonds 12June2014.

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Presentation on theme: "Sentinel V ADCP - In Search of the Perfect Wave Presented By: Aaron Robertson and Darryl Symonds 12June2014."— Presentation transcript:

1 Sentinel V ADCP - In Search of the Perfect Wave Presented By: Aaron Robertson and Darryl Symonds 12June2014

2 Outline Sentinel V System Overview Sentinel V System Overview Sentinel V Currents and Waves Data Review Sentinel V Currents and Waves Data Review

3 Sentinel V – Designed for Flexibility Four Beams: Our standard to ensure Quality Data A 5 th Beam: to Provide Added Value No Battery Over the Counter Battery TRDI Supplied Battery And…. The Product is Sized to meet the demands of the discoveries you are searching.

4 EZ Connectivity Wired Connection TCP/IP Ethernet connection RS232/422/485 Wireless Interface Wireless setup Wireless download Wireless updates Single Digit Start Up Start with a touch of your finger

5 Hassle Free Hardware Quick Connect Handle Securely and comfortably carry two at once, … instead of cradling it! Captive Hex Bolts Find them instead of looking for them!

6 Power and more Power External Battery Case Provide an added 100 or 1000+ Watt Hours 2 Different Battery Options: Battery chamber using off the shelf Alkaline D Cells 1 - 3 month typical deployment setups Alkaline D Cell Battery Pack 12 – 24 month typical deployment setups

7 Worry Free Battery Replacement! Captured O-rings Dove tail groove retains o-ring in its groove Oring Tool allows you to keep your groove! Flood Resistant Electronics Chamber Separate Battery and Electronics chambers

8 Worry Free Data Collection! Record all your data and never consider anything less! 16GB SD Card standard 32GB Option (release TBD) Raw Data Stored Single Ping Beam Data Reprocess data at different averaging intervals Improved Data Quality Controls Remove Outliers in Post Processing Ability to Improve Diagnostic Review of Data 16GB 32GB

9 *Multiple Access* Profiling Allows mulitple users to profile on a coordinated basis Interleaved and/or successive profiling setups Operating at independent and selectable rates Data Collection Options! * Two Minds* Profiling Deploy concurrent “safe” and “experimental” setups Interleave different setups each optimized for much different flow conditions Uninterrupted Data Collection Upload of recorded data in the background On-the-fly reconfiguration of profiling

10 A Fifth Beam for More Coverage! Vertical Beam Measures vertical velocity profile range to the surface high resolution echo intensity profile Allows turbulence measurements error velocity validation with 3 beam solutions redundant error velocity validation with 4 beams zero up waves parameter

11 Velocity software uses 2D & 3D plotting so you can see the Big Picture Patterns & Trends Squint Left to Right (time, track) Top to Bottom In and Out One to Another (e.g., Beams, Parameters)

12 Data values Stare Summary (Statistics) Center value & variation Span & Spread Symmetry & Strays Clumps & Gaps Velocity software uses 1D plotting so you can see the Detail

13 Interactive Control of Data Thresholds Velocity software provides basic and advanced post processing

14 Interactive Control of Data Thresholds Velocity software provides basic and advanced post processing

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16 Why Measure Waves?  Critical Factor for Coastal Region Beaches … summer fun, winter destruction Coastal economy  Safety Shipping & Boating: ocean routes, coastal lanes Coastal Destruction: storm surges, tsunamis  Coastal and Offshore Engineering Shore Protection, Structures: design, survival Mechanism for restoring natural equilibrium  Energy Source Wave & Tidal Power

17 Traditional Methods for Measuring Wave Direction Triplet Method – PUV triplet Single point current meter w pressure – Surface Following Device Heave/Pitch/Roll buoy Array Method – Spatial Array of Sensors (small, large) pressure sensors, capacitance wave staffs

18 Waves energy propagation

19 Orbital Wave Energy is flattened due to the bottom

20 Energy of short waves decays with depth

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22 Triplet Method - Devices 3 time series of mutually orthogonal (x,y,z) information about wave field measured at one location – 2 variables related to first order (x,y) spatial derivatives of water surface, another to temporal surface variability PUV: Pressure, u/v components of velocity – Subsurface current meter with pressure sensor HPR: heave, pitch, roll – Surface tracking buoy

23 Triplet Method - Check List 50-year history, convenient to use, accepted, standard processing method Considerations – Directional resolution, poor high frequency response – Shallower waters for PUV except for lower frequencies, Deeper waters for HPR (compliance in mooring) Issues for attention – Strong currents, Multi-directional wave field – Directional spread can be broad (cf. high resolution Max Entropy method: too narrow)

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25 Array Method-Devices Devices – Pressure sensors, wave staffs – Horizontal profiling sonar Data – Multiple time series of information about wave field measured at varying spatial separation – Amplify pressure data observed at depth to equivalent surface values – Amount of amplification varies with frequency

26 Array Method-Check List 50-year history, superior directional resolution, differing processing methods Considerations – High frequency response limited to shallower waters except for lower frequencies – Measuring lower frequencies requires extensive array size to resolve direction while keeping small lags to avoid aliasing Issues for Attention – Strong currents

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28 PUV – Triplet Processing PPP Pressure = Non Directional Wave Data: Hs, Tp UV Velocity Bin = Directional Wave Data: Dp

29 UVW – Triplet Processing UV Velocity Bin = Directional Wave Data: Dp W Velocity Bin = Non Directional Wave Data: Hs, Tp

30 Vertical Beam = High Resolution Non Directional Spectrum: Hs, Tp Vertical Beam Surface Tracking – Triplet Processing UV Velocity Bin = Directional Wave Data: Dp

31 4 Slant Beams Surface Tracking – Triplet Processing 4 Slant Beams = High Resolution Non Directional Spectrum: Hs, Tp UV Velocity Bin = Directional Wave Data: Dp

32 Orbital Waves Processing 4-20 Independent Sensors form an Array Directional Spectrum with IMLM Provides Highly Accurate Waves Direction & Multiple Directions: Dp

33 Teledyne RD Instruments Wave Gauge

34 Waves from Multiple Directions LOW Frequencies HIGH Frequencies N S WE 10-s Swell from West 4-s Wind Waves from East

35 Currents Only Sampling Strategy 10min Ensemble Single Ping Ensembles Multiple Ping Ensembles Evenly Spaced in Time Multiple Ping Burst Ensembles

36 Currents Only Sampling Strategy Burst Ping Ensembles 8 Pings/Ens * 6 Ens/Hr = 48 Pings/hr Burst Ping Ensembles + Burst Ensembles 2 Pings/Ens * 24 Ens/Hr = 48 Pings/Hr 10 Min

37 Waves Sampling Strategies 10min Current Ens. Waves Burst duration is User Selectable, min/typical 20mins Pings for Current Ens. within Waves burst are shared with Wave Burst Current Ens. Are User Selectable typical 10mins A set of Pings for Current Ens. outside Waves burst are at User Selected Interval Pings for Waves Burst are 2Hz

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