DWR4
The wave sensor of the Directional Waverider equipped with the Acoustic Current Meter option (DWR4/ACM for short) is identical to the sensor in the well-known Directional Waverider MkI, II and III.
| Manufacturer: Datawell |
The wave sensor of the Directional Waverider equipped with the Acoustic Current Meter option (DWR4/ACM for short) is identical to the sensor in the well-known Directional Waverider MkI, II and III.
Processing of the measured data is now performed at the doubled sample frequency of 2.56 Hz. The high frequency limit of the heave and direction signals is shifted from 0.58 to 1.0 Hz. With this choice, the high frequency limit of the wave buoy is determined by the hydrodynamic response of the hull, not by the onboard instrumentation.
In addition, the DWR4 transmission protocol allows for a superior heave and horizontal displacement resolution. Easy comparison of the new DWR4 output to the familiar DWR-MkIII results is facilitated in the accompanying Waves5 software suite.
Measurement
- wave height for wave periods of 1 to 30 seconds, accuracy 0.5 % of measured value
- wave direction
- surface current
- water temperature
Features
- GPS for buoy monitoring and tracking through HF link
- internal logger
- LED flash antenna
- power switch
- Intelligent Test Box (only for 0.9 buoys)
- 0.9 m (0.7 m) diameter spherical hull of AISI 316 including eccentric mooring eye
- 1.6 years (10 months) battery life
- optional Cunifer hull, excellent against bio-fouling
- solar panel (optional)
Options for communication
- HF-Link range 50 km
- Iridium SBD Module
- Iridium Internet Module
- Argos satellite communication
- GSM Module for data transfer into the GSM-Net
Batteries
- DWR4 buoy with 0.7 m diameter needs 13 RC25G batteries.
- DWR4 buoy with 0.9 m diameter needs 26 RC25G batteries.
Software
- Easy comparison of the new DWR4 output to the familiar DWR-MkIII results is facilitated in the accompanying Waves5 software suite.