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Wave Unit

The Datawell Wave Unit is an OEM version of the well-known Directional Waverider MkIII for measuring wave motions in three directions. The unit gives out the real time heave, north and west displacements as well as common wave parameters like Hs and Tz and spectral data.

The Wave Unit is built around Datawell’s accurate and well-proven stabilized platform sensor, enabling wave height measurements by a single accelerometer. For the wave direction, direct pitch and roll measurements are performed needing no integration. In combination with horizontal accelerometers and a compass this forms the complete sensor unit, the heart of the Wave unit.

The Wave Unit is essentially a DWR-MkIII Waverider buoy in an OEM package. It is meant to be integrated as a complete sensor package in oceanographic and meteorological buoys.

Range: -20 m to +20 m, resolution: 0.01 m
Accuracy: < 0.5% of measured value after calibration
< 1.0% of measured value after 3 years
Period*: 1.6 s to 30 s

* The actual high frequency cut-off point depends on the size of the buoyancy platform on which the wave unit is mounted.

Range: 0° to 360°, resolution 1.4° (1 binary degree)
Heading error: 0.4° to 2° (depending on latitude), typically 0.5°
Period: 1.6 s to 30 s

** This specification assumes that the magnetic field is not disturbed by the presence of magnetic materials.

Port: RS-232
Format: Datawell hexadecimal format (HXV)
Data output rate: 1.28 Hz (internal sampling 3.84 Hz)
Temperature range Operating: -5 °C to +35 °C
Storage: -5 °C to +40 °C (+55 °C short term, weeks only)
Weight Approx. 36 kg
Material Housing stainless steel AISI 316
Isolation All inputs and outputs are galvanically isolated
Size Diameter approx. 410 mm
Height over all approx. 560 mm

Software Waves5

Waves5 is Datawell’s newest Microsoft Windows based software package for data acquisition, processing, and display of wave data by Datawell Waveriders – directional and non-directional. Measuring oceanographic parameters does not solely involve gathering data and logging it. To get a complete view of the governing conditions at sea, it is desirable to post-process and present the data as well. The oceanographic parameters measured with a Waverider are made available to the user by data transfer like the HF-transmitter, GSM- and satellite links and data processing, storing and presentation software. The latter is taken care of by Waves5, the Microsoft Windows based software package developed by Datawell.
A picture of a Maximum Entropy Method directional spectrum in Waves5.


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