Nortek Support
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What are the different coordinate systems and how are they defined?
All Nortek instruments define the direction of measured current velocities using three primary coordinate systems: Beam coordinate system Cartesian coordinate system (XYZ) East-North-Up coordinate...
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How do I calculate current speed and direction from the ADCP velocity components?
An instrument will have as many velocity vectors as the number of beams. A three beam instrument will thus provide three velocity components, regardless of the chosen coordinate system (see the FAQ...
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The Comprehensive Manual - ADCP
DescriptionProvides you with all information needed to use an ADCP. Covers Principles of Operation, Troubleshooting, the Service Manual and a System Integrator Manual - Light. InstrumentsLegacy Aq...
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What is the latest firmware for my Aquadopp, AWAC and Vector Gen 1 instrument?
Due to changes in memory card suppliers during 2023, two firmware options are now available for Aquadopp, AWAC, and Vector Gen 1 instruments. These updates are necessary because the original memory...
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What are amplitude and correlation, and what do they tell us about data quality?
Amplitude In general, amplitude is a typical variable used to describe the characteristics of a wave. It says something about the amount of energy transferred by the wave and can be seen as a measu...
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Custom deployment with raw bottom track
Date Author Comment Revision 26-05-2023 Jos van Heesen created 1.0 05-jun-2023 C.W. minor clarification and text clean-up 1.1 Purpose of this technical note Although the Signature VM sy...
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QA/QC current measurement (comprehensive)
Unfortunately, many things can go wrong during a deployment. This may be related to the environment, configuration settings, the instrument, or other equipment. Some quality checks should be carrie...
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Where can I find the AWAC VM user manual?
An older version of the Vessel Mounted Current Profiler user manual is available for download below. How to use and operate SurveyVM is explained in the software
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Why do I have extreme values in my Signature / Generation 2 telemetry data?
The ASCII telemetry data that is transmitted by the Signature / Generation 2 series of instruments is quality controlled before it is sent, and any data that is deemed unreliable is flagged. The cr...
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Why do I have two .ad2cp files from my Signature?
When you download data from your Signature, you may find that you have two *.ad2cp files: *.ad2cp *_avgd.ad2cp Because Signatures have a high sampling rate and the ability to store raw data, the ...