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 Currents and Waves Data Review

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

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

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

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

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

8. Worry Free Data Collection!
Record all your data and never consider anything less!
16GB SD Card standard
32GB Option (release TBD)
16GB
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
32GB

9. Data Collection Options!
*Multiple Access* Profiling
Allows mulitple users to profile on a coordinated basis
Interleaved and/or successive profiling setups
Operating at independent and selectable rates
*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. Velocity software uses 1D plotting so you can see the Detail
Data values Stare
Summary (Statistics)
Center value & variation
Span & Spread
Symmetry & Strays
Clumps & Gaps

13. Flexible Processing Standard / Advanced
Velocity software provides basic and advanced post processing
Flexible Processing Standard / Advanced
Interactive Control of Data Thresholds

14. Outlier Removal One pass screening & Interpolation
Velocity software provides basic and advanced post processing
Outlier Removal One pass screening & Interpolation
Interactive Control of Data Thresholds

15. Overview Background of Measuring Waves TRDI ADCP Wave Measurement
TRDI Currents & Waves Measured with a Sentinel V

16. Why Measure Waves? Critical Factor for Coastal Region Safety
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
Some motivating factors for study of Waves

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

21. Triplet Method

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)

24. Array Method

25. Array Method-Devices Devices Data 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

27. Teledyne RDI Waves Measurements

28. PUV – Triplet Processing
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 Surface Tracking – Triplet Processing
Vertical Beam = High Resolution Non Directional Spectrum: Hs, Tp
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
HIGH Frequencies
10-s Swell from West
4-s Wind Waves from East W E
LOW Frequencies S

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

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

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

38. Sentinel V Currents and Waves Measurements