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Nortek Signature100vm low
Nortek Signature VM Ocean 55k Hz frontview
Figure 7
IMG 20210823 091134
Nortek Signature100vm low Nortek Signature VM Ocean 55k Hz frontview Figure 7 IMG 20210823 091134

VESSEL-MOUNTED CURRENT PROFILER

Signature VM Ocean - 100|75/55 kHz

Des capacités d'ADCP monté sur coque avec en option un échosondeur pour la mesure de la biomasse

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Aperçu

  • Until now, epipelagic and mesopelagic VM ADCP surveys could not deliver the resolution, precision or range to examine the ocean boundary layer in detail. To study biomass in the upper-ocean boundary layer, you had to add a separate scientific echosounder.

    Nortek’s vessel-mounted Signature VM Ocean in the 100 kHz version opens up new opportunities to measure currents and to study biomass simultaneously. The 55 kHz version offers long-range current profiles with a proper precision.

Points forts

  • A coherent and modern system that is quick and convenient to operate
  • Automated processing
  • VM or stand-alone applications
  • A novel transducer design allows focusing on measurement precision (75 kHz) and a 1000 m profiling range (55 kHz)
  • Four beams for current profiling with a range over 300 m (100)
  • Optional scientific echosounder with multiple modes for biomass (100)

Applications

  • Offshore operations
  • Internal waves
  • Upper-ocean boundary-layer studies (100)
  • Detection of krill or plankton in the water column (100)
  • Deep-water current profiles, ocean discharge (55)

    • Toggle all

    • Water Velocity Measurements - Signature VM 100 kHz

      Profiling range** 300-400 m
      Doppler processing Broadband & Narrowband
      Cell size 3-15 m
      Max no. cells 200
      Min. blanking 2
      Minimum accuracy 1.0% of the measured value ± 0.5 cm/s
      Velocity resolution 0.1 cm/s
      Maximum sampling rate 1 Hz (1/3 Hz with BT and echosounder)
      Velocity range (along beam) 5 m/s
      No. of beams 4 slanted at 20°
      **) Depending on acoustic scattering condition.

    • Water Velocity Measurements - Signature VM 75/55 kHz

      Profiling range** 685/1000 m
      Doppler processing Broadband/Broadband & Narrowband
      Cell size 6-20 m
      Max no. cells 200
      Min. blanking 2
      Minimum accuracy 1.0% of the measured value ± 0.5 cm/s
      Velocity resolution 0.1 cm/s
      Maximum sampling rate 1 Hz (1/3 Hz at max power)
      Velocity range (along beam) 5 m/s
      No. of beams 3 slanted at 20°
      **) Depending on acoustic scattering condition.

    • Bottom velocity measurements - Signature VM 100 kHz

      Single ping std @ 3 m/s TBA
      Long-term accuracy TBA
      Minimum altitude 5 m
      Maximum altitude 560 m
      Velocity resolution 0.01 mm/s
      Maximum sampling rate 1 Hz (1/3 Hz with VP and echosounder)

    • Bottom velocity measurements - Signature VM 75/55 kHz

      Single ping std @ 3 m/s TBA
      Long-term accuracy TBA
      Minimum altitude 50 m
      Maximum altitude 1200 m
      Velocity resolution 0.01 mm/s
      Maximum sampling rate 1 Hz

    • Echo intensity (slanted beams) - Signature VM 100 kHz

      Sampling Same as velocity for slanted beams
      Resolution/dynamic range 0.5 dB/70 dB
      Dynamic range 70 dB slanted beams
      Transducer acoustic frequency 100 kHz
      No. of beams 4 slanted at 20°
      Beam width 6.1°

    • Echo intensity (slanted beams) - Signature VM 75/55 kHz

      Sampling Same as velocity
      Resolution/dynamic range 0.5 dB/70 dB
      Dynamic range 70 dB slanted beams
      Transducer acoustic frequency 75 and 55 kHz
      No. of beams 3 slanted at 20°
      Beam width 4.5°-5.5°

    • Echosounder option - Signature VM 100 kHz

      No. of beams 1 vertical
      Transducer acoustic frequency 70-120 kHz
      Sampling 1 Hz (1/3 Hz with VP and BT)
      Transducer beam width 15° @ 70 kHz, 8.7° @ 120 kHz
      Resolution 0.375 –4 m
      Resolution/ dynamic range 0.01 dB/130 dB
      Transmit pulse Monochromatic 70 kHz, 90 kHz and 120 kHz or frequency chirp (90 kHz, 50% BW)
      Transmit power 7.5-120 W adjustable
      Chirp signal processing Pulse compression or binned frequency response

    • Echosounder option - Signature VM 75/55 kHz

      No. of beams N/A
      Transducer acoustic frequency N/A
      Sampling N/A
      Transducer beam width N/A
      Resolution N/A
      Resolution/ dynamic range N/A
      Transmit pulse N/A
      Transmit power N/A
      Chirp signal processing N/A

    • Other - Signature VM 100 kHz

      Temperature sensor range / accuracy -4 °C to 40 °C / 0.1 °C
      Pressure Piezo resistive
      Standard range 0-1500 m (inquire for options)
      Accuracy/precision 0.1% FS / Better than 0.002% of full scale
      Compass and tilt Solid-state magnetometer and accelerometer
      Data recording 16 GB (inquire for options)
      Data cable 30 m Ethernet cable (inquire for options)
      IO Ethernet
      DC input 15-48 V DC

    • Other - Signature VM 75/55 kHz

      Temperature sensor range / accuracy -4 °C to 40 °C / 0.1 °C
      Pressure Piezo resistive
      Standard range 0-1500 m (inquire for options)
      Accuracy/precision 0.1% FS / Better than 0.002% of full scale
      Compass and tilt Solid-state magnetometer and accelerometer
      Data recording 16 GB (inquire for options)
      Data cable 30 m Ethernet cable (inquire for options)
      IO Ethernet
      DC input 48 V DC

    • Dimensions - Signature VM 100 kHz

      Maximum diameter 460 mm
      Maximum length without room for internal batteries 350 mm

    • Dimensions - Signature VM 75/55 kHz

      Maximum diameter 650 mm
      Maximum length without room for internal batteries 314 mm

    • Environmental

      Operating temperature -4 °C to 40 °C
      Storage temperature -20 °C to 60 °C
      Vibration IEC 60068-1/IEC60068-2-64
      EMC approval IEC 61000
      Depth rating 1500 m – Bottom track is limited to surface vessels
      Connectors Straight fitted MCBH6F (Ethernet)
      Housing Small instrument housing
      Material POM with titanium fasteners

    • Processing unit

      Processor/memory Intel i5/8 GB
      Hard disk SSD, 500 GB
      Operating system Windows® 10
      Housing Half 19" 2 HE case or 19" rack-mountable 1 HE
      Dimensions 265x110x340 mm or 480x45x325 mm
      Input 24 V DC, 20 W typical
      Total weight 5.75 or 3.80 kg
      Connections Power, Signature ADCP, AN_GNSS, 2x HDMI, 2xLAN, 3x USB, 1x RS-232 (optional)

    • Nortek Signature VM acquisition software

      Acquisition Signature VM - binary, GNSS compass - binary
      Timing < 0.6 s, IEEE1588/PTP for absolute time stamping (GNSS/Signature VM)
      Configuration Signature VM (partly) GNSS Advanced navigation
      Display Vessel track in map, Bottom-track velocity, Bottom-track depth, Velocity magnitude and direction, Echo amplitude (slanted beams), Echo correlation (slanted beams), corrected relative volume backscatter (100)
      Status Signature VM + AN_GNSS compass
      Output NMEA data strings online CSV, ASCII VMT, MATLAB VMT, MATLAB, KML

    • GNSS compass option

      Brand and model Advanced Navigation GNSS compass
      Position accuracy (with dGNSS)/post-processed Horizontal : 0.6 m/0.01 m, 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-accuracy RTK 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 NMEA 0183, AN Packet protocol, TSS1, Simrad

    • AHRS option

      Accelerometer dynamic ± 2 g
      Gyro dynamic range ± 250°/sec
      Magnetometer dynamic range ± 1.3 Gauss
      Pitch and roll range/resolution ± 90° (pitch), ± 180° (roll)/0.01°
      Pitch and roll accuracy ± 2° (dynamic)3), ± 0.5° (static, ± 30°)
      Heading range / resolution 360°, all axes/0.01°
      Heading accuracy ± 3° (dynamic)3), ± 2° (static, tilt < 20°)
      Sampling rate Same as measurement rate

    • Toggle all

    •  Main product

      01

      Signature100 VM Ocean

      02

      Signature55 VM Ocean

    •  Probe type /head

      01

      4-beam head (100)

      02

      3 beam head (55)

      03

      5-beam head (adds 95 kHz center transducer for echo sounder)(100)

    •  Housing

      01

      Short, no room for battery (external battery canister for bottom-mount use) (same as currently stated; same for 100 and 55)

    •  Memory

      01

      16 GB SD card data logger (same as currently stated; same for 100 and 55)

      02

      64 GB SD card data logger (same as currently stated; same for 100 and 55)

      03

      128 GB SD card data logger (same as currently stated; same for 100 and 55)

    •  Pressure sensor

      01

      Pressure sensor, 0-1500 m, accuracy 0,1% of FS (standard) (same as currently stated; same for 100 and 55)

      02

      Pressure sensor, 0-100 m, accuracy 0,1% of FS (same as currently stated; same for 100 and 55)

    •  Cables

      01

      AD2CP: 30 m Ethernet cable with MCIL6MP, Power/RJ45 at dry end (standard) (same as currently stated; same for 100 and 55)

      02

      AD2CP: 30-100 m Ethernet cable (specify length) with MCIL6MP-PWR/RJ45 (same as currently stated; same for 100 and 55)

    •  Mounting

      01

      Vessel-mounted over the side (same as currently stated; same for 100 and 55)

      02

      Vessel hull-mounted (same as currently stated; same for 100 and 55)

      03

      Unmanned Surface Vehicle (USV) mounted (please inquire) (same as currently stated; same for 100 and 55)

    • Other

      01

      Compass and tilt sensor

      02

      AHRS

      03

      Heading GNSS (dGNSS),

      04

      High Accuracy Heading GNSS (RTK)

Contenu associé

Modern acoustic Doppler current profilers (ADCPs) can measure the complex movements of currents in oceans, rivers and lakes with great accuracy

Understanding vessel-mounted current measurement

Wiki
Nortek staff in China mobilizing the Signature VM package under the attentive eye of end user Wang Yan, Senior Manager of Hydrology at CCCC’s Zhongjiao No.1 Hangwu Engineering Reconnaissance Design Institute.

Vessel-mounted current surveys along China's Maritime Silk Road

User Story
Simplifying vessel-mounted current measurement with Signature VM

Simplifying vessel-mounted current measurement with Signature VM

Video
Signature Media Coverage
Studying the Ocean in 3D
24/12/2019
Read in Sea Technology
Maritime infrastructure projects in China use current profiling tools
02/05/2019
Read in Sea Technology
Obtaining Critical, High-Resolution Ocean Measurements at a Lower Cost
12/12/2019
Read in Ocean News & Technology
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