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Vessel-mounted current profiler

Signature VM

The Signature VM package delivers vessel-mounted AD2CP capabilities based on present-day technology

Technical specification (PDF)
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Highlights

  • Five beams for current and depth
  • Outstanding bottom-track performance
  • A coherent system that is quick and convenient to operate

Overview

  • Until now, ADCP current surveys have been complex and time-consuming processes. A successful current survey depends on highly skilled personnel and the hardware set-up is unique, and challenging, for each vessel. This leads to concerns regarding interfacing, synchronization, offsets and mounting. A miscalculation in connection with any one of these factors can lead to errors that affect the final velocity data quality.

    Nortek’s vessel-mounted ADCP current survey package – called Signature VM – opens up new and unprecedented opportunities to the community, while offering operational convenience and reduced complexity. Data quality can be safeguarded, and both errors and initial installation time can be substantially reduced by using an integrated system where each is module is pre-qualified

Applications

  • Coastal research
  • Port and harbor mapping
  • Studies of tidal currents
  • Sediment transport studies

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    • Water velocity measurements for Signature VM1000

      Profiling range* 30 m
      Cell size 0.2–2 m
      Max no. cells 128
      Min. blanking 0.1 m
      Minimum accuracy 0.3% of the measured value ± 0.3 cm/s
      Velocity resolution 0.1 cm/s
      Maximum sampling rate 14 Hz
      No. of beams 4 slanted at 25 degrees
      *) Maximum range depends on acoustic scattering conditions and transmit power.

    • Water velocity measurements for Signature VM500

      Profiling range* 70 m
      Cell size 0.5–4 m
      Max no. cells 128
      Min. blanking 0.5 m
      Minimum accuracy 0.3% of the measured value ± 0.3 cm/s
      Velocity resolution 0.1 cm/s
      Maximum sampling rate 6 Hz
      No. of beams 4 slanted at 25 degrees
      *) Maximum range depends on acoustic scattering conditions and transmit power.

    • Bottom velocity measurements for Signature VM1000

      Single ping std @ 3 m/s 0.5 cm/s
      Long-term accuracy ± 0.1% / ± 0.1 cm/s
      Minimum altitude 0.2 m
      Maximum altitude 30 m
      Velocity resolution 0.01 mm/s
      Maximum sampling rate 4 Hz

    • Bottom velocity measurements for Signature VM500

      Single ping std @ 3 m/s 0.5 cm/s
      Long-term accuracy ± 0.1% / ± 0.1 cm/s
      Minimum altitude 0.3 m
      Maximum altitude 70 m
      Velocity resolution 0.01 mm/s
      Maximum sampling rate 2 Hz

    • Depth measurements for Signature VM1000

      No. of beams 1 vertical
      Maximum sampling rate 2 Hz
      Max. range 30 m
      Vertical resolution / accuracy 0.001 m / 1% of the measured value**
      **) Assuming a constant speed of sound

    • Depth measurements for Signature VM500

      No. of beams 1 vertical
      Maximum sampling rate 2 Hz
      Max. range 70 m
      Vertical resolution / accuracy 0.001 m / 1% of the measured value**
      **) Assuming a constant speed of sound

    • Echo intensity

      Sampling Same as velocity for slanted beams
      Resolution 0.5 dB
      Dynamic range 70 dB slanted beams
      No. of beams 4 slanted at 25 degrees
      Beam width 2.9°

    • Other

      Temperature sensor range /accuracy -4 °C to 40 °C / 0.1 °C
      Pressure Piezo resistive
      Standard range 0-100 m (inquire for options)
      Accuracy/precision 0.1% FS / better than 0.002% of full scale
      Compass and tilt Solid-state magnetometer
      Data recording 16 GB (inquire for options)
      Data cable 20 m Ethernet cable (inquire for options)
      IO Ethernet
      DC Input 12–48 V DC

    • Environmental

      Operating temperature -4 °C to 40 °C
      Storage temperature -20 °C to 60 °C
      Shock and vibration IEC 60068-1 / IEC 60068-2-64
      EMC approval IEC 61000
      Depth rating 300 m – Bottom track is limited to surface vessels
      Connectors Straight fitted MCBH6F (Ethernet)
      Housing Small instrument housing
      Material POM with titanium fasteners

    • Rack-mount processing unit

      Processor/memory Intel i7, 8 GB
      Hard disk SSD 240 GB
      Operating system Windows® 10
      Housing 19" rack-mountable 1 HE
      Dimensions 480x45x220 mm (19" rack-mountable 1 HE)
      PC Input 100-240V AC, Max. 25W
      Interface box Input 100-240V AC as standard or 12-34V DC. Max. 15W
      Dimensions 240x45x300 mm (0.5x19” rack mountable 1 HE)
      Total weight 4 kg PC, 3 kg Interface box
      Connections Power, Signature VM, GNSS, Ethernet, USB,HDMI, VGA
      Operator control Optional 19" rack mount
      LCD panel Optional 19" rack mount

    • Nortek Signature VM acquisition software

      Acquisition Signature VM - binary, GNSS compass - binary
      Timing < 0.6 s, IEEE1588/PTP for absolute timestamping (GNSS compass/Signature VM)
      Configuration Signature VM (partly)Advanced navigation GNSS compass
      Display Vessel track in map, Bottom-track velocity, Velocity magnitude and direction, Echo amplitude, Echo correlation, Vertical depth
      Status Signature VM + GNSS compass
      Output NMEA data string online (velocity and depth) CSV, ASCII VMT, MATLAB VMT, KML

    • GNSS compass

      Brand and model Advanced navigation GNSS compass
      Position accuracy (with dGNSS) / post-processed Horizontal: 0.6 m / 0.01m, Vertical: 1.0 m / 0.02 m
      Heading accuracy / post-processed 0.2°/ 0.09°
      Supported navigation systems GPS L1, GLONASS G1, GALILEO E1, Beidou B1
      Optional High AccuracyRTK variant GPS L1_L2, GLONASS G1_G2, GALILEO E1_E5b, BeiDou B1_ B2
      Motion 9-axis IMU
      Communication Ethernet 10/100
      Timing PTP, NTP timeserver functionality
      Protocol NMEA0183, AN Packet protocol, TSS1, Simrad

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    • Main product

      01

      Signature1000 VM

      02

      Signature500 VM

    • Probe type /Head

      01

      5-beam head

    • Housing

      01

      Short, no room for battery (external battery canister for bottom mount use)

    • Memory

      01

      16 GB SD card data logger

      02

      64 GB SD card data logger

    • Pressure sensor

      01

      Pressure sensor 0-100 m, 0.1% (standard) All other available Signature1000_500

    • Cables

      01

      AD2CP: 20 m Ethernet cable with MCIL6MP, Power/RJ45 at dry end (standard)

      02

      AD2CP: 10-100 m Ethernet cable (specify length) with MCIL6MP-PWR/RJ45

      03

      GNSS: GC-POE-CABLE-20M Ethernet cable for GNSS Compass 20 m (please inquire for other length)

    • Mounting

      01

      Vessel Mounted over the side

      02

      Vessel Hull mounted

      03

      Unmanned Surface Vehicle (USV) mounted (please inquire)

    • Other

      01

      Compass and Tilt sensor

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