Bertinoro Advanced Bertinoro Advanced Training Training T-RDI: Marine T-RDI: Marine Measurements Measurements 1Mar2007
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 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 WH Waves Array Upgrade Express to WH Waves Array for Measuring Wavesfor Measuring Waves
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
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 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
• 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 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