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Waverider SG

The second generation Waverider SG (WR-SG) is a real-time non-directional wave height measuring buoy.

Wave height is measured with a resolution of 1 cm using the well-proven Datawell stabilized platform sensor. The stabilized platform ensures that the buoy accurately tracks the vertical component of the orbital wave motion. In the WR-SG, the platform mounting of the sensor has been reinforced, significantly increasing the robustness of the buoy.

The WR-SG is the successor to the Waverider Fl. Whereas the Waverider Fl used analogue techniques to process the wave data, the Waverider SG digitizes the wave signal at an early stage.

  • Sensor
    wave motion sensor based on a stabilised platform, accelerometer, and magnetic compass.
  • Measures
    – wave height for wave periods of 1.0 to 30 seconds, accuracy 0.5 % of measured value
    – water temperature
  • Additional features
    – GPS for buoy monitoring and tracking through HF link
    – internal data logger
    – power switch
    – LED flash antenna
    – 0.9 m (0.7 m) diameter spherical hull of AISI 316
    – optional Cunifer hull, warranted not to corrode
    – 2.6 years (1.3 year) battery life
Range -20 m to 20 m
Resolution 0.01 m
Scale accuracy (gain error) < 0.5% of measured value after calibration
< 1.0% of measured value after 3 years
Period 1 s to 30 s
Standard features
Datalogger Compact flash module 2 Gb
LED flashlight Antenna with integrated LED flasher, colour yellow (590 nm), standard length 35 cm, “Standard pattern”: 5 flashes every 20 s, “Increased pattern”: 5 flashes every 15 s.
GPS position 12 channel, fix every 30 minutes, precision < 5 m
Water temperature Range -5 °C to +46 °C, resolution 0.05 °C, accuracy 0.2 °C
Material Stainless steel AISI 316 or Cunifer 10
Hull diameter 0.7 m or 0.9 m (excluding fender)
Weight Approx. 95 kg 0.7 m AISI 316
Approx. 150 kg 0.9 m AISI 316
Batteries 0.7 m operational life 16.5 months, 1 section of 13 batteries
0.9 m operational life 33 months, 2 sections of 13 batteries
Type: Datacell RC25G (250 Wh green)
Power switch Data files are closed an secured
Processing 32 bits microprocessor system
Temperature range Operating: -5 °C to +35 °C
Storage: -5 °C to +40 °C (+55 °C short term, weeks only)
Hull painting Brantho-Korrux “3 in 1” paint system (no anti-fouling)
Receiver RX-C, RX-D or Warec (older Warecs may need modification)
Optional features
Datawell HF link Frequency range 25.5 to 35.5 MHz (35.5 to 45.0 MHz on request).
Transmission range 50 km over sea, user replaceable.
For use with the Datawell RX-C or RX-D receiver.
Air temperature
Measuring height: 2 m above sea surface
Temperature range: -20 °C to +70 °C
Resolution: 0.01 °C
Exposed accuracy: ±0.5 °C (±1 °C when solar induced uncertainty detected)
Iridium Satellite communication
GSM Mobile communication
Radar reflectors Two reflectors mounted on hatchcover (retrofittable)
A picture of a CAT4 antenna with a background of the sea

Compact Air Temperature (CAT4)

The CAT4 is a meteorological air temperature sensor integrated in the HF-antenna of the Directional Waverider. It consists of four individual sensors that have different radiative properties and will therefore measure different temperatures. The actual air temperature is derived from these different temperatures. External influences that might affect the measurements, such as evaporative cooling, are detected for validation.

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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