RD Instruments Home of the ADCP Measuring Water in Motion and Motion in Water THETIS Waves Data QA RD Instruments Home of the ADCP

RD Instruments Home of the ADCP Measuring Water in Motion and Motion in Water THETIS WAVES DATA QA 1. RD Instruments Overview 2. Capability of ADCP waves Array 3. Initial Data Processing + Interpretation 4. Data Recovery + Re-Processing 5. Re-Processed Data QA

RD Instruments Home of the ADCP Measuring Water in Motion and Motion in Water Company & Capabilities

RD Instruments Home of the ADCP Measuring Water in Motion and Motion in Water 1981: First commercial ADCP in the world 1981: First commercial ADCP in the world 1985: First river discharge ADCP 1985: First river discharge ADCP 1991: Broadband ADCP patent 1991: Broadband ADCP patent 1994: Phased array ADCP patent 1994: Phased array ADCP patent 1995: Workhorse ADCP. 1995: Workhorse ADCP. 1999: ADCP waves array patent 1999: ADCP waves array patent 2001: Horizontal ADCP 2001: Horizontal ADCP 2002: ZedHed: Shallow-depth ADCP 2002: ZedHed: Shallow-depth ADCP 2003: StreamPro, Channel Master 2003: StreamPro, Channel Master 2004: Waves from a Horizontal 2004: Waves from a Horizontal History of Innovation

RD Instruments Home of the ADCP Measuring Water in Motion and Motion in Water Business Units Marine Measurements Marine Measurements Underwater Navigation Underwater Navigation Water Resources Water Resources Man-made channels Man-made channels

RD Instruments Home of the ADCP Measuring Water in Motion and Motion in Water ADCP Waves Array Method ADCP Waves Array = remote sensed array of sensors ADCP Waves Array = remote sensed array of sensors 12x near surface “orbital motion” senors – Array processing for direction 12x near surface “orbital motion” senors – Array processing for direction 3x independent estimates of non-directional information 3x independent estimates of non-directional information Easy standard processing Easy standard processing Powerful data recovery capability Powerful data recovery capability Automated data recovery – June 2005 Automated data recovery – June 2005

RD Instruments Home of the ADCP Measuring Water in Motion and Motion in Water Constructing the ARRAY?

RD Instruments Home of the ADCP Measuring Water in Motion and Motion in Water PUV Processing Provides Biased Measurements Direction #1 Direction #2 Biased Direction Array Processing Allows Multiple Directions to be Measured at a Single Frequency Array Processing Avoids Bias in Direction Statistics

RD Instruments Home of the ADCP Measuring Water in Motion and Motion in Water Deployment Guidelines Bottom Mounted, for Tide, Currents + Multi- Directional Waves Bottom Mounted, for Tide, Currents + Multi- Directional Waves In Line Frame, Mooring, Upwards Looking for Currents + Uni-Directional Waves In Line Frame, Mooring, Upwards Looking for Currents + Uni-Directional Waves Real Time or Self Contained Operation Real Time or Self Contained Operation Frequency Choice Frequency Choice Bottom Mounted, for Tide, Currents + Multi- Directional Waves Bottom Mounted, for Tide, Currents + Multi- Directional Waves In Line Frame, Mooring, Upwards Looking for Currents + Uni-Directional Waves In Line Frame, Mooring, Upwards Looking for Currents + Uni-Directional Waves Real Time or Self Contained Operation Real Time or Self Contained Operation Frequency Choice Frequency Choice

RD Instruments Home of the ADCP Measuring Water in Motion and Motion in Water Deployment Guidelines

RD Instruments Home of the ADCP Measuring Water in Motion and Motion in Water WavesMon for Data Processing Process self contained data Process self contained data Extract currents + wave data Extract currents + wave data Generate output files Generate output files Real-time data collection + display capability Real-time data collection + display capability Generate real time graphic data output Generate real time graphic data output

RD Instruments Home of the ADCP Measuring Water in Motion and Motion in Water WavesMon Auto Setup (1) Click Auto Setup. Click Auto Setup. At the ADCP Data File dialog box, select the data file to be opened by using the Browse button. At the ADCP Data File dialog box, select the data file to be opened by using the Browse button. Click Open. Click Open.

RD Instruments Home of the ADCP Measuring Water in Motion and Motion in Water Enter the ADCP Altitude Above Bottom when the ADCP was deployed. Enter the ADCP Altitude Above Bottom when the ADCP was deployed. Click OK. Click OK. WavesMon Auto Setup (2)

RD Instruments Home of the ADCP Measuring Water in Motion and Motion in Water Click GO Click GO WavesMon Auto Setup (3)

RD Instruments Home of the ADCP Measuring Water in Motion and Motion in Water Data QA—Check List Use WaveView to verify data quality ( *.wvs file) Check for reasonable parameters in the time series (Hs, Tp, Dp) Check error log   Check for agreement in 1-D spectra   Check for reasonable high frequency cutoff   Check for reasonable directional spectra

RD Instruments Home of the ADCP Measuring Water in Motion and Motion in Water Check for reasonable parameters in the time series (Hs, Tp, Dp) Much Lost data = ISSUE! Much Lost data = ISSUE!

RD Instruments Home of the ADCP Measuring Water in Motion and Motion in Water Check Error Log (wmerrlog.txt) Near surface bin (#2) has low percentage of good samples. 90 % good is required to complete processing of Velocity Array

RD Instruments Home of the ADCP Measuring Water in Motion and Motion in Water Reasons for bad near surface bin in array? Check quality of ensemble averaged velocity data Check for excessive tilts Check readings of pressure sensor relative to surface track

RD Instruments Home of the ADCP Measuring Water in Motion and Motion in Water Check Quality of Ensemble Averaged Velocity Data Low Error Velocity = Good near surface data

RD Instruments Home of the ADCP Measuring Water in Motion and Motion in Water Check For Excessive Pitch + Roll <5 degrees pitch + roll = Good hardware deployment

RD Instruments Home of the ADCP Measuring Water in Motion and Motion in Water Check readings of pressure sensor relative to surface track (1) Re-Process using expert option – use surface track for depth Compare results with pressure sensor based depth measurement (ascii log file format 5) Calculate difference (excell)

RD Instruments Home of the ADCP Measuring Water in Motion and Motion in Water Check readings of pressure sensor relative to surface track (2) Result = 1217 mm average difference (pressure – surface)

RD Instruments Home of the ADCP Measuring Water in Motion and Motion in Water Re-Process (1) Add pressure sensor offset mm Use pressure sensor for Depth Use bottom 2 bins in array

RD Instruments Home of the ADCP Measuring Water in Motion and Motion in Water Data QA—Check List Use WaveView to verify data quality ( *.wvs file) Check for reasonable parameters in the time series (Hs, Tp, Dp) Check error log   Check for agreement in 1-D spectra   Check for reasonable high frequency cutoff – EXPECT ERRORS in Default Values – Deeper Bins –More Signal Attenuation – Must decrease high frequency Cutoff   Check for reasonable directional spectra

RD Instruments Home of the ADCP Measuring Water in Motion and Motion in Water Check High Frequency Cutoff Incorrectly set high frequency cutoff will result in high Hs, incorrect Tp, incorrect Dp Proper HF cutoff for Vspec = 0.38 hz

RD Instruments Home of the ADCP Measuring Water in Motion and Motion in Water Re-Process (2) Add pressure sensor offset mm Use pressure sensor for Depth Use bottom 2 bins in array Change High Frequency Cutoff to 0.38 hz

RD Instruments Home of the ADCP Measuring Water in Motion and Motion in Water Data QA—Check List Use WaveView to verify data quality ( *.wvs file) Check for reasonable parameters in the time series (Hs, Tp, Dp) Check error log   Check for agreement in 1-D spectra   Check for reasonable high frequency cutoff   Check for reasonable directional spectra

RD Instruments Home of the ADCP Measuring Water in Motion and Motion in Water Check for reasonable parameters in the time series (Hs, Tp, Dp)

RD Instruments Home of the ADCP Measuring Water in Motion and Motion in Water Check error log One surface tracking burst “bad” One surface tracking burst “bad”

RD Instruments Home of the ADCP Measuring Water in Motion and Motion in Water Check for agreement in 1-D spectra / Check for reasonable high frequency cutoff

RD Instruments Home of the ADCP Measuring Water in Motion and Motion in Water Check Directional Spectra

RD Instruments Home of the ADCP Measuring Water in Motion and Motion in Water Conclusion Pressure sensor in error Pressure sensor in error Data recovered with advanced processing options Data recovered with advanced processing options Detailed pressure sensor inspection required Detailed pressure sensor inspection required Possible re-calibration Possible re-calibration RDI Europe Field Serivce to advise RDI Europe Field Serivce to advise

RD Instruments Home of the ADCP Measuring Water in Motion and Motion in Water ADCP Waves Array Method ADCP Waves Array = remote sensed array of sensors ADCP Waves Array = remote sensed array of sensors 12x near surface “orbital motion” senors – Array processing for direction 12x near surface “orbital motion” senors – Array processing for direction 3x independent estimates of non-directional information 3x independent estimates of non-directional information Easy standard processing Easy standard processing Powerful data recovery capability Powerful data recovery capability Automated data recovery – June 2005 Automated data recovery – June 2005