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Home of the ADCP Measuring Water in Motion and Motion in Water.

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Presentation on theme: "Home of the ADCP Measuring Water in Motion and Motion in Water."— Presentation transcript:

1 Home of the ADCP Measuring Water in Motion and Motion in Water

2 Home of the ADCP Measuring Water in Motion and Motion in Water Web site: www.adcp.com

3 Measuring Water in Motion and Motion in Water ADCPs on Ships

4 Home of the ADCP Measuring Water in Motion and Motion in Water Your instructor Title: Research Scientist, Technical Marketing Time at RD Instruments: 1990-2006 Education: Ph.D., Ocean Physics, Velocity Profilers Relevant Writings: See TRDI Web site -- Tech Tips page Contact: pspain@teledyne.com Cell: +1.858.254.4140 Pete Spain

5 Home of the ADCP Measuring Water in Motion and Motion in Water Course objectives Current Surveys Current Surveys Ocean Surveyor / WH Mariner Ocean Surveyor / WH Mariner Data Data Installation Concerns Installation Concerns Software Setup Software Setup Data QA/QC Data QA/QC Operational Limitations Operational Limitations By completing this course, you will understand clearly

6 Measuring Water in Motion and Motion in Water Measuring Water in Motion ADCPs Acoustic Doppler Current Profilers

7 Measuring Water in Motion and Motion in Water Why Make Spatial Current Surveys? Applied Science Applied Science Oceanography Oceanography Coastal Dynamics Coastal Dynamics Environmental Information Environmental Information Impact statements Impact statements Advection – Dispersion modeling Advection – Dispersion modeling Feeding behavior Feeding behavior Forcing on structures Forcing on structures

8 Measuring Water in Motion and Motion in Water Who/What is Teledyne RDI? Part of Teledyne Technologies Part of Teledyne Technologies High technology business in San Diego, California, since 1981 High technology business in San Diego, California, since 1981 Develop advanced technology systems Develop advanced technology systems Make them useful to a broad range of marine/river/navigation applications Make them useful to a broad range of marine/river/navigation applications 190 staff and over $36M in 2005 sales 190 staff and over $36M in 2005 sales More than 7500 ADCPs sold worldwide More than 7500 ADCPs sold worldwide Presently 60 units per month Presently 60 units per month 24/7 Customer Support 24/7 Customer Support ISO 9001-2000 certified ISO 9001-2000 certified

9 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 History of Innovation

10 Measuring Water in Motion and Motion in Water Chesapeake Bay Plume Offshore of North Carolina Coastal Dynamics

11 Measuring Water in Motion and Motion in Water Tidally generated eddy off Three Trees Point Coastal Dynamics Photo and plot courtesy of Prof. Parker MacCready (University of Washington).

12 Measuring Water in Motion and Motion in Water JAMSTEC RV Kaiyo off of Mindanao, Philippines Vessel Mounted ADCPs

13 Measuring Water in Motion and Motion in Water Volunteer Observing Ships Courtesy Charles Flagg, Brookhaven National Laboratory

14 Measuring Water in Motion and Motion in Water Volunteer Observing Ships Explorer of the Seas

15 Measuring Water in Motion and Motion in Water Volunteer Observing Ships Oleander Courtesy Charles Flagg, Brookhaven National Laboratory

16 Measuring Water in Motion and Motion in Water Recovery of the Ehime Maru Image courtesy of the US Navy Vessel Mounted ADCPs Images courtesy of Texas A&M

17 Measuring Water in Motion and Motion in Water Ancillary Data Zooplankton Migration

18 Measuring Water in Motion and Motion in Water Ancillary Data Avoidance Behavior Courtesy of Gwyn Griffiths (SOC)

19 Measuring Water in Motion and Motion in Water ADCP vs Current Meters

20 Measuring Water in Motion and Motion in Water Moving Platforms Speed over ground Speed over ground Altitude Altitude

21 Measuring Water in Motion and Motion in Water Vessel-Mounted ADCP Package ADCP Transducer ADCP Transducer ADCP Transducer Cable ADCP Transducer Cable ADCP Electronics Chassis ADCP Electronics Chassis ADCP Data Acquisition Software ADCP Data Acquisition Software

22 Measuring Water in Motion and Motion in Water Ocean Surveyor Mariner Phased Array / Piston Transducers

23 Measuring Water in Motion and Motion in Water Transducers

24 Measuring Water in Motion and Motion in Water Cabling Options Wet end: Right Angled or Straight-in Connector Dry end: Loose or Attached

25 Measuring Water in Motion and Motion in Water ADCP Electronics Chassis ADCP Electronics Chassis Serial Comms. Interface Serial Comms. Interface Attitude Interface (Synchro/Stepper) Attitude Interface (Synchro/Stepper) ADCP Data Acquisition Software ADCP Data Acquisition Software ADCP Setup & Control ADCP Setup & Control GPS NMEA Interface GPS NMEA Interface Attitude NMEA Interface Attitude NMEA Interface Vessel-Mounted ADCP Package

26 Measuring Water in Motion and Motion in Water Supplied by the user: Supplied by the user: Vessel Heading Interface Vessel Heading Interface Vessel GPS Interface Vessel GPS Interface Dedicated Computer Dedicated Computer Sea Chest (or well) to install the ADCP Sea Chest (or well) to install the ADCP Vessel-Mounted ADCP Package

27 Measuring Water in Motion and Motion in Water Block Diagram of Vessel Mounted Setup ADCP Chassis ADCP Transducer Vessel GPS Vessel Heading Vessel Computer Serial (NMEA) OR Synchro/ Stepper OR Synchro/ Stepper Vessel Pitch/Roll Serial (NMEA) OR Synchro Speed Log Data Raw Data

28 Measuring Water in Motion and Motion in Water Depth Below Keel (meters) Range (meters) RDIs ADCP Answer 21-20WH Mariner 1200kHz 42-40WH Mariner 600kHz 2512-150WH Mariner 300kHz 5025-400OS 150kHz 10050-700OS 75kHz 200100-1000OS 38kHz Choosing the Frequency

29 Measuring Water in Motion and Motion in Water Narrowband/Broadband

30 Home of the ADCP Measuring Water in Motion and Motion in Water General Installation Concerns Engine noise Engine noise Flow disturbance Flow disturbance On or off the centerline On or off the centerline Attitude Attitude Large or varying magnetic fields Large or varying magnetic fields Fixture ringing Fixture ringing

31 Home of the ADCP Measuring Water in Motion and Motion in Water Installation Types Gate valve Pole Well Sonde Up-looking Moon Pool

32 Home of the ADCP Measuring Water in Motion and Motion in Water Conceptual Well Design

33 Home of the ADCP Measuring Water in Motion and Motion in Water Acoustic Windows 0.75 in1.5 in 0.5 in 1.0 in

34 Home of the ADCP Measuring Water in Motion and Motion in Water A Typical WinRiver Display

35 Home of the ADCP Measuring Water in Motion and Motion in Water Communications Tab

36 Home of the ADCP Measuring Water in Motion and Motion in Water ADCP SETUP Tab

37 Home of the ADCP Measuring Water in Motion and Motion in Water AVERAGING Tab

38 Home of the ADCP Measuring Water in Motion and Motion in Water A Typical VMDAS Display

39 Home of the ADCP Measuring Water in Motion and Motion in Water Data QA/QC Return Signal Strength Intensity (RSSI) Return Signal Strength Intensity (RSSI) Correlation Correlation Percent Good Percent Good Error Velocity Error Velocity Inter-beam Comparisons (e.g. fish screening) Inter-beam Comparisons (e.g. fish screening)

40 Home of the ADCP Measuring Water in Motion and Motion in Water Data QA/QC Return Signal Strength Intensity (RSSI) Return Signal Strength Intensity (RSSI) Generally expected to decay with range Generally expected to decay with range Increase with range indicates a solid object – e.g. the bottom Increase with range indicates a solid object – e.g. the bottom Low scattering concentration can result in data drop out Low scattering concentration can result in data drop out

41 Home of the ADCP Measuring Water in Motion and Motion in Water Data QA/QC Correlation Correlation Measure of how much the scatterer distribution has changed between measurements Measure of how much the scatterer distribution has changed between measurements In the absence of a boundary – usually sets the range In the absence of a boundary – usually sets the range

42 Home of the ADCP Measuring Water in Motion and Motion in Water Data QA/QC Percent Good Percent Good 1: Percentage of solutions that used three beams Percent Good 1: Percentage of solutions that used three beams Percent Good 2: Percentage rejected for high error velocity Percent Good 2: Percentage rejected for high error velocity Percent Good 3: Percentage rejected for having fewer than three good beams Percent Good 3: Percentage rejected for having fewer than three good beams Percent Good 4: Percentage of solutions that used all four beams Percent Good 4: Percentage of solutions that used all four beams

43 Home of the ADCP Measuring Water in Motion and Motion in Water Data QA/QC Error Velocity Fundamental Assumption: All beams are measuring the same flow.

44 Home of the ADCP Measuring Water in Motion and Motion in Water Fish Screening

45 Home of the ADCP Measuring Water in Motion and Motion in Water VMDAS Data: Typical Display

46 Home of the ADCP Measuring Water in Motion and Motion in Water Operational Limitations Weak Scattering Layers Weak Scattering Layers Strong Scattering Layers Strong Scattering Layers Acoustic Interference Acoustic Interference Heading Alignment Errors Heading Alignment Errors Large Pitch and Roll Large Pitch and Roll

47 Home of the ADCP Measuring Water in Motion and Motion in Water Operational Limitations Weak Scattering Layers These can cause velocity dropouts at a given depth

48 Home of the ADCP Measuring Water in Motion and Motion in Water Operational Limitations Strong Scattering Layers These can cause high velocities in a layer that seem to depend on the vessels speed

49 Home of the ADCP Measuring Water in Motion and Motion in Water Operational Limitations Acoustic Interference These can cause velocity drop outs in diagonal bands

50 Home of the ADCP Measuring Water in Motion and Motion in Water Current Magnitude Current Direction Operational Limitations

51 Home of the ADCP Measuring Water in Motion and Motion in Water Severe pitch/roll This can limit the measurement range B1 B2 B3 B4 Operational Limitations

52 Home of the ADCP Measuring Water in Motion and Motion in Water Severe pitch/roll This can limit the measurement range Operational Limitations

53 Home of the ADCP Measuring Water in Motion and Motion in Water JAMSTEC RV Kaiyo off of Mindanao, Philippines Vessel Mounted ADCPs

54 Measuring Water in Motion and Motion in Water ADCPs on Ships


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