Bertinoro Advanced Training T-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 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.

FeatureExpressWorkhorse 4 Beam TransducerYes Standard Pressure Rating200m Test Cable5m Test Power Supply48VDC Shipping CasePlastic 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 FeatureExpressWorkhorse Accuracy0.8%0.3% Ensemble Rate5, 6, 10, 20, 30min0.5–86399secs Number of Pings/Ensemble Ping Rate1-7 secs0.5s - 23 hrs Bin Size0.25-2m 1200kHz 0.5-4m 600kHz m Burst SampleNoYes Sync. with other Sensors/ Sonar NoYes Output data formatPD0 onlyMultiple

Upgrade Express to Mode 12 for Boundary Studies

Upgrade Express to WH Waves Array for Measuring Waves

Upgrade Express to Mariner for Moving Boat Surveys

ADCP DATA TELEMETRY Acoustic and Inductive 1Mar2007

Real Time Data Requirement

ADCP DATA TELEMETRY Acoustic WH or NEMO Interfaced to a RD Instruments Acoustic Modem

ADCP DATA TELEMETRY Inductive WH or NEMO Interfaced to a RD Instruments Inductive Modem

ADCP DATA TELEMETRY Acoustic and Inductive

DOPPLER VOLUME SAMPLER (DVS) ADCP HIGH RESOLUTION 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 ( m bin size) 4 Janus 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 OceanographersAcademic Oceanographers Oil IndustryOil Industry Navy Meteorological OfficersNavy Meteorological Officers Managers / RegulatorsManagers / Regulators –Fisheries –Natural Resources Courtesy ESR INSTANT mooring deployment, Makassar Strait / p11

DVS to Compliment ADCP in Mooring Arrays Courtesy Bill Johns, RSMAS

DVS Mooring TypesSurface Bottom Images modified from Bill Johns, RSMAS Subsurface DVS ADCP DVS ADCP DVS

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 – 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