Nortek Signature VM 1000k Hz frame frontview squared
Nortek Signature VM processing unit
Nortek Signature250 250k Hz sideview 5 transducer
Nortek Signature VM delivery box
Signature250 VM ready to be deployed through moonpool
Nortek Signature VM 1000k Hz frame frontview squared
Nortek Signature VM processing unit
Nortek Signature250 250k Hz sideview 5 transducer
Nortek Signature VM delivery box
Signature250 VM ready to be deployed through moonpool

Vessel-mounted

VM Coastal (1000|500|250 kHz)

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

  • A coherent system that is quick and convenient to operate
  • Outstanding bottom-track performance, even under challenging conditions
  • Fifth echosounder beam for sediment measurements down to the bottom (1000/500)

Overview

The VM Coastal safeguards data quality, opens up new and unprecedented opportunities to the scientific community, and offers operational convenience and reduced complexity.

The VM Coastal package includes the Signature1000, 500 or 250, allowing for great versatility in both the vessel-mounted and bottom-mounted configurations. By using a state-of-the-art and user-friendly vessel-mounted package, measurement errors and initial installation time can be greatly reduced.

  • Currents
  • Echosounder
  • Bottom track

Highlights

  • A coherent system that is quick and convenient to operate
  • Fifth echosounder beam for sediment measurements down to the bottom (1000/500)
  • Ethernet ADCP and GNSS hardware, offering tight network timing
  • Simultaneous current and depth information in one place (1000/500)
  • Outstanding bottom-track performance, even under challenging conditions
  • Straightforward data-acquisition and processing software

Usage

  • Coastal surveys, up to 200 m depth
  • Port and harbor mapping
  • Sediment transport studies
  • Large-scale mixing studies

Setup

Most vessels can accommodate the compact VM Coastal. A fairing bracket is included to house the Signature ADCP and reduce drag. Other components include a GNSS and a processing unit for pulling together system data.

Deployment

Configure, view, forward and store current velocity data in real time from the VM acquisition software while onboard the vessel. Gather current speed and direction information as well as biomass or sediment estimates using the optional scientific echosounder.

Data

Process and export subsets of interest using the VM review software once your survey has ended. A connection to Qrev makes it possible to calculate discharge independently.

Download PDF

Profiling range*

30 m

Cell size

0.2–2 m

Max no. cells

256

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.

Profiling range*

70 m

Cell size

0.5–4 m

Max no. cells

256

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.

Profiling range*

200 m

Cell size

1–8 m

Max no. cells

256

Min. blanking

0.5 m

Minimum accuracy

1% of the measured value ± 0.5 cm/s

Velocity resolution

0.1 cm/s

Maximum sampling rate

2 Hz

No. of beams

4 slanted at 20 degrees

*) Maximum range depends on acoustic scattering conditions and transmit power.

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

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

Single ping std @ 3 m/s

TBA

Long-term accuracy

TBA

Minimum altitude

5 m

Maximum altitude

205 m

Velocity resolution

0.01 mm/s

Maximum sampling rate

1 Hz

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

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

No. of beams

N/A*

Maximum sampling rate

N/A

Max. range

N/A

Vertical resolution / accuracy

N/A

*) Depth measurement via the 4 slanted beams.

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°

Sampling

Same as velocity for slanted beams

Resolution

0.5 dB

Dynamic range

70 dB slanted beams

No. of beams

4 slanted at 20 degrees

Beam width

2.3°

No. of beams

1 vertical

Maximum sampling rate

2 Hz

Max. range

30 m

Resolution

3 mm - 0.25 m

Number of bins

10,000

Transmit pulse length

16 μs - 0.5 ms

Transmit pulse

Monochromatic or pulse compressed (25% BW)

Resolution / dynamic range

0.01 dB / 70 dB

No. of beams

1 vertical

Maximum sampling rate

1 Hz

Max. range

70 m

Resolution

6 mm - 0.5 m

Number of bins

11,000

Transmit pulse length

32 μs - 1 ms

Transmit pulse

Monochromatic or pulse compressed (25% BW)

Resolution / dynamic range

0.01 dB / 70 dB

No. of beams

N/A

Maximum sampling rate

N/A

Max. range

N/A

Resolution

N/A

Number of bins

N/A

Transmit pulse length

N/A

Transmit pulse

N/A

Resolution / dynamic range

N/A

Temperature sensor range /accuracy

-4 °C to 40 °C / 0.1 °C

Pressure

Piezoresistive

Standard range

0-300 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

10 m Ethernet cable (inquire for options)

IO

Ethernet

DC Input

15–48 V DC

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

300 m – Bottom track is limited to surface vessels

Connectors

Straight fitted MCBH6F (Ethernet)

Housing

Small instrument housing

Material

POM with titanium fasteners and additional, reinforced transducer cups for VM 250

Processor/memory

Intel i5/8 GB

Hard disk

SSD, 500 GB

Operating system

Windows® 10

Housing

Half 19" 2 HE case

Dimensions

265x110x340 mm

Input

24 V DC, 20 W typical. (230|120 V AC adaptor supplied)

Total weight

5.75 kg

Connections

Power, Signature ADCP, AN_GNSS, 2x HDMI, 2xLAN, 3x USB

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, Bottom-track depth, Velocity magnitude and direction, Echo amplitude, Echo correlation, Vertical depth, Vertical echogram; corrected relative volume backscatter (1000/500)

Status

Signature VM + AN_GNSS compass

Output

Online: NMEA data formats. Offline: CSV, ASCII VMT, MATLAB, MATLAB VMT, MATLAB QRev, KML

*) Signature1000 and 500

Brand and model

Advanced navigation GNSS compass v2

Position accuracy (with RTK)

Horizontal: 0.01 m, Vertical: 0.015 m

Heading accuracy

0.2°

Supported navigation systems

GPS L1_L2, GLONASS G1_G2, GALILEO E1_E5b, BeiDou B1_B2

Heave accuracy

0.05 m

Communication

Ethernet 10/100

Timing

PTP, NTP timeserver functionality

Protocol

NMEA 0183, AN Packet Protocol, TSS1 Simrad, RTCM

Accelerometer dynamic range

± 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

Signature1000 - General Arrangement
Signature1000 VM Mounting Bracket
Signature500 - General Arrangement
Signature500 VM Mounting Bracket
Signature250 - General Arrangement
Signature250 VM Mounting Bracket

Declaration of Conformity - Signature1000
Declaration of Conformance - GNSS Compass
Declaration of Conformity - SignatureVM
Statement of Compliance - Signature1000
Environmental test report - Vibration test - Signature

Signature1000 VM

Signature500 VM

Signature250 VM

5-beam head (1000, 500)

4-beam head (250)

5-beam head (adds 500 kHz center transducer for wave measurements) (250)

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

16 GB SD card data logger

64 GB SD card data logger

128 GB SD card data logger

256 GB SD card data logger

Pressure sensor 0-300 m, 0.1% (standard)

Pressure sensor 0-50 or 0-100 m, 0.1% (option)

AD2CP: 10 m Ethernet cable with MCIL6MP, Power/RJ45 at dry end (standard)

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

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

Vessel Mounted over the side

Vessel Hull mounted

Unmanned Surface Vehicle (USV) mounted (please inquire)

Compass and Tilt sensor

AHRS

This package includes the acquisition and review software

New features, fixes and functionality

New features, fixes and functionality

New features, fixes and functionality

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