Bertinoro Advanced Training Bertinoro Advanced Training T-RDI: Marine MeasurementsT-RDI: Marine Measurements

1Mar2007

New RDI Offerings

1. New WH Express Product Offering

2. New WH Telemetry Integration Offering

3. The New Doppler Volume Sampler (DVS)

Talk to your RDI Representative for more details!

EXPRESS ADCPEXPRESS ADCP

1Mar2007

Express ADCP - System Overview

• Frequency – 1200 or 600kHz

• WorkHorse Hardware– WorkHorse Sentinel Express Sentinel

Express

Express ADCP

• Meeting today’s customers needs today while ensuring future flexibility.

• Low cost solution for today's basic, non-moving current profiling applications

• Upgrade path for tomorrow’s bottom tracking surveys, wave and turbulence measurements.

Feature Express Workhorse

4 Beam Transducer Yes Yes

Standard Pressure Rating 200m 200m

Test Cable 5m 5m

Test Power Supply 48VDC 48VDC

Shipping Case Plastic Case Plastic Case

* NOTE 1: If the Waves Array, Bottom-track or turbulence upgrade is purchased, these parameters will be also be restored to the capability of the Workhorse Monitor ADCP.

H/W Options Express vs. Standard WorkHorse

Express ADCP - System Overview• Modified Firmware / Software• Easy Configuration

– Standard setups limit user choices (increases ease of use for new users)

– Advanced features excluded to reduce complexity for new ADCP users

– Optimized for basic non-moving applications

• Reduced Cost– Fewer steps in manufacturing (no lake test)

• Fully upgradeable to standard WH ADCP

F/W Options Express vs. Standard WorkHorse

Feature Express Workhorse

Accuracy 0.8% 0.3%

Ensemble Rate 5, 6, 10, 20, 30min 0.5–86399secs

Number of Pings/Ensemble 100-250 1-16384

Ping Rate 1-7 secs 0.5s - 23 hrs

Bin Size 0.25-2m 1200kHz 0.5-4m 600kHz

0.04-16 m

Burst Sample No Yes

Sync. with other Sensors/ Sonar

No Yes

Output data format PD0 only Multiple

Upgrade Express to Mode 12 Upgrade Express to Mode 12 for Boundary Studiesfor Boundary Studies

Upgrade Express to WH Waves Array Upgrade Express to WH Waves Array for Measuring Wavesfor Measuring Waves

Upgrade Express to MarinerUpgrade Express to Marinerfor Moving Boat Surveysfor Moving Boat Surveys

ADCP DATA TELEMETRYADCP DATA TELEMETRYAcoustic and InductiveAcoustic and Inductive

1Mar2007

Real Time Data Requirement

ADCP DATA TELEMETRYADCP DATA TELEMETRYAcousticAcoustic

WH or NEMO Interfaced to a

Acoustic D oppler Solutions

RD InstrumentsRD Instruments

Acoustic Modem

ADCP DATA TELEMETRYADCP DATA TELEMETRYInductiveInductive

WH or NEMO Interfaced to a

Acoustic D oppler Solutions

RD InstrumentsRD Instruments

Inductive Modem

ADCP DATA TELEMETRYADCP DATA TELEMETRYAcoustic and InductiveAcoustic and Inductive

DOPPLER VOLUME SAMPLERDOPPLER VOLUME SAMPLER(DVS) (DVS)

ADCP HIGH RESOLUTION ADCP HIGH RESOLUTION SHORT RANGE PROFILING SHORT RANGE PROFILING

1Mar2007

Doppler Volume Sampler (DVS)

• Unique solution for moored oceanographic studies where data quality assurance and long term deployments are required.

DVS System Overview• 3-D Current Profiler - 5 m range• Frequency - 2.4MHz • 5 bins (0.25-5 m bin size) • 4 Janus beams @ 45 deg.• 16 Mb internal memory• Pressure Rating = 750 meters• Size:

– 69 cm (27 in) length– 10.2 cm (4 in) diameter– <7Kg (<15 lbs) in air

• Optional – Inductive Modem– High Resolution Temperature Sensor– Mounting Clamp and Fin– Pressure Sensor

Who Can Use the DVS?

• Academic Oceanographers Academic Oceanographers

• Oil IndustryOil Industry

• Navy Meteorological OfficersNavy Meteorological Officers

• Managers / RegulatorsManagers / Regulators– FisheriesFisheries– Natural ResourcesNatural Resources

Courtesy ESR Courtesy ESR http://www.esr.org/esrphotos.htmlINSTANT mooring deployment, Makassar Strait / p11INSTANT mooring deployment, Makassar Strait / p11

DVS to Compliment ADCP in Mooring Arrays

Courtesy Bill Johns, RSMASCourtesy Bill Johns, RSMAS

DVS Mooring TypesSurfaceSurface BottomBottom

Images modified from Bill Johns, RSMASImages modified from Bill Johns, RSMAS

SubsurfaceSubsurface

DVS

DVS

DVS

DVS

DVS

ADCP

ADCP

DVS

ADCP

2 7 0 0 lb . D W an ch o r

6 0 m e te rs o f 58" M o o rin g C h a in

X m ete rs o f 38" N ilsp in

DVS

Mooring Line “Strum” and Vortex Shedding

Mooring Line “Strum” and Vortex Shedding

• Quality Evaluation Data– Measure a profile and see SHEAR to identify if mooring

line eddies, buoys or floats are causing errors in bins near transducer.

– Error Velocity– Correlation

What is novel about the TRDI solution?

• Four beam (Janus) configuration– Velocity QA - error velocity to indicate flow inhomogeneity

(e.g. mooring line interference)– Redundancy – reliability; allows three beam solution

when one beam is blocked (e.g. by bio-growth or fish)– Fish rejection QA – iterative algorithm preventing biased

velocity data by rejecting beam measurements biased by fish and strong scattering layers

• Relative backscatter – echo intensity to indicate signal levels

What is novel about the TRDI solution?

• Data Quality Assurance - Signal Processing– Correlation values – velocity data confidence– BroadBand Signal processing for high precision outlier

rejection– HPR Sensor variability parameters – data confidence

• Power Savings– 50-100 velocity measurements per sample to allow mm/s

precision in one second –power saving

Special Features

• Seabird OEM High Resolution Temp. Sensor– ± 0.005ºC Precision– Sensor isolated from plastic housing and

exposed to water flow

Special Features

• Integrated SeaBird OEM Inductive Modem

Special Sampling Schemes

• Sampling Schemes– Polled Mode– Communicate without interrupting sampling

• Compass Sampling for QA– High sampling rate 15hz– Tilt and heading can be averaged (up to 8

samples per second) to smooth vibrations