Specifications

Table 5.4.4. Specifications of DWR-MkIII.

Parameter Value

Heave

Range −20-+20 m

Resolution 1 cm

Scale accuracy (gain error) < 0.5 % of measured value after calibration

< 1.0 % of measured value after 3 year

Zero offset < 0.1 m

Period time 1.6 s-30 s

Cross sensitivity < 3%

Direction

Range 0º-360º

Resolution 1.5º

Reference magnetic north

Buoy heading error 0.4º-2º depending on latitude, typical 0.5º

Period time in free floating condition 1.6 s-30 s

Period time in moored condition 1.6 s-20 s

Filter

Sampling frequency 3.84 Hz

Digital filtering type phase-linear, combined band-pass

and double-integrating FIR filter

Filter delay 133.3 s

HF Output buffer delay and actual

HF output

5.5 s (exact, does not apply to logger files)

HF Data output rate 1.28 Hz

Band-pass characteristics 0.056-0.58 Hz: 0.03 dB

0.04-0.59 Hz: 0.3 dB

0.033-0.6 Hz: 3 dB

Low frequency side 24 dB/octave

High frequency side > 60 dB

Extreme temperatures

Operating (in water) −5 ºC-+35 ºC (water temperature)

Storage −5 ºC-+40 ºC

Short term storage (weeks) max. 55 ºC

Short term storage min. see Equation (5.4.2)