doppler volume sampler (dvs) data results high spatial/temporal resolution short range profiling

DOPPLER VOLUME SAMPLER(DVS)

DATA RESULTS

HIGH SPATIAL/TEMPORAL RESOLUTION

SHORT RANGE PROFILING

Deployment Concepts DVS

Bottom

DVS

ADCP

Surface

Images modified from Bill Johns, RSMAS

ADCP

2700 lb. DW anc hor

60 m ete rs of 58" M ooring C h ain

X me ters of 38" N ilspin

DVS

Subsurface

DVS

DVS

DVS

DVS

DVS

ADCP

NOAA

• 2007 Test Deployment off of Hawaii, USA

• 2007 Deployment in Puget Sound• Results originally presented and

published by Patricia Plimpton of PMEL/NOAA/US Dept of Commerce and Jerry Mullison of RDI at Oceanology International March 2008

Hawaii test deployment

4800m depth

• Factory defaults• Five 50cm bins, first centered at

55cm• A one second 14 ping ensemble

every 10 minutes• 10 minute inductive polling

Hawaii 7m depth current meters

Hawaii 35m current meters

Hawaii temperature data

Hawaii Conclusions

• Setup of 14 pings taken in one second every ten minutes led to noisy current measurements and further averaging was required to do comparison

NOAA adjusted setup for future deployments will have longer averages

• Velocity direction change ties to the remixing of the upper water column seen in the temperature plots

• Temperature measurements are reasonable for the mixed layer environment

Puget Sound Subsurface Mooring• Five 50 cm bins, first centered at 152

cm• DVS at 140m averaged 840 ping in 60

seconds every 10 minutes• DVS at 149m averaged 840 ping in 120

seconds every 10 minutes

Puget Sound Currents

Puget Sound Instrument Comparison ~142m depth

DVS (bin 1) vs Sentinel

DVS (bin 1) vs Argonaut

(y – x)

(y – x)

SEN = -0

.04

+ 1.

00xD

VS

SEN = -7

.30

+ 1.

06xD

VS

ARG = -0

.08

+ 1.

01xD

VS

ARG = -6

.66

+ 1.

05xD

VS

Puget Sound DVS: Bin to Bin Speed Differences

Puget Sound DVS: Correlation and Intensity

Puget Sound DVS: Correlation and % Data Return

Puget Sound temperature data

Puget Sound Conclusions• Current measurements match well with

other instruments

• DVS OEM SBE38 temperature sensor matched well with the reference instruments

• Range of ~2-3m matched expected typical profiling range;

BIO DVS Deployment

• Department of Fisheries and Oceans (DFO) Bedford Institute of Oceanography, (BIO) Test and Evaluation of the Doppler Volume Sampler (DVS)

• BIO performs initial test in early 2008 results presented at IEEE Current Meter Conference Mar08

• BIO performs a second deployment in Summer 2008 preliminary results shown here pending BIO’s publication

Mooring Location and Setup

MOORING # 1681 ADCP GREENAN HFX LINE STN# 2 MAY 2007

38M 3 /16" JACKETED WIRE

BENTHOS 866A RELEASE

1 M 5/8" GALVANIZED CHAIN

ANCHOR (HAS TO BE AT LEAST 900 LBS OR A SMALL DOUBLE) 155 METERS

52 METERS

GLASS BUB PACKAGE

1 STREAMLINED VINY FLOAT

SWIVEL

1 STREAMLINED VINY FLOAT WITH PICK-UP ROPE

GLASS BUB PACKAGE

300 KHz ADCP IN SUB

37M 3 /16" JACKETED WIRE WITHSBE37 MICROCAT CLAMPED ONJUST BELOW BUB

AANDERAA RCM8 CURRENT METER

RCM11 CURRENT METER

3M 3/16" JACKETED WIRE WITHDOPPLER VOLUME SAMPLERCLAMPED-ON 1M ABOVE RCM1165 METERS

66 METERS

74 METERS

8M 3/16" JACKETED WIRE

SEAGUARD62 METERS



SEAGUARD72 METERS



112 METERS

Data ResultsMOORING # 1681 ADCP GREENAN HFX LINE STN# 2 MAY 2007





52 METERS

GLASS BUB PACKAGE


SWIVEL


GLASS BUB PACKAGE

300 KHz ADCP IN SUB



RCM11 CURRENT METER


66 METERS

74 METERS


SEAGUARD62 METERS



SEAGUARD72 METERS



112 METERS

RDI WH 300kHz ADCP

Aanderaa RCM8

Data Courtesy: - Murray Scotney BIO Dept. Fisheries & Oceans Canada - Aanderaa Industries






52 METERS

GLASS BUB PACKAGE


SWIVEL


GLASS BUB PACKAGE

300 KHz ADCP IN SUB



RCM11 CURRENT METER


66 METERS

74 METERS


SEAGUARD62 METERS



SEAGUARD72 METERS



112 METERS

RDI WH 300kHz ADCP

Aanderaa SeaGuard







52 METERS

GLASS BUB PACKAGE


SWIVEL


GLASS BUB PACKAGE

300 KHz ADCP IN SUB



RCM11 CURRENT METER


66 METERS

74 METERS


SEAGUARD62 METERS



SEAGUARD72 METERS



112 METERS

RDI WH 300kHz ADCP

RDI DVS ADCP

Aanderaa SeaGuard CM


Contacts

Main Office:Teledyne RD Instruments, Inc.14020 Stowe DrivePoway, CA 92064Main: +1-858-842-2600www.rdinstruments.com

European Office:Teledyne RDI Europe5 Avenue Hector PintusLa Gaude, FranceMain: +33-492-110-930

China Office: Teledyne RD Technologies:1206 Dongfang Road, Pu DongShanghai 20122ChinaMain: +86-215-830-6939

UK Representative:Andy SmithSaderet Ltd.The Old ParsonageSt. JudesIsle of ManBritish Isles IM7 2EW+44 (0)1624 [email protected]

http://www.rdinstruments.com/

mailto:[email protected]

http://www.saderet.co.uk/

doppler volume sampler (dvs) data results high spatial/temporal resolution short range profiling

Documents

ping ensembles

velocity direction change

sensorspuget sound dvs

good agreement

hawaii test deployment

rdi deployment concepts

puget sound subsurface

hawaii conclusionssetup