Marine Current Meter Calibration Using GNSS Receivers, a Comparison with Commercial Method
Abstract: Getting information
from marine current requires that accurate and calibrated current meter is
used. Current meter calibration is carried out in accordance with specific
standard in calibration laboratories. To evaluate the performance and health of
a current meter, one should compares velocity and heading it with a velocity
and heading reference. In this paper, the innovative method for evaluate
velocity and heading resulted from impeller marine current meter is presented.
In this method, current meter is to be attached to buoy that is installed on it
tow GNSS receivers; and by towing it in a lake, simultaneous velocity and
heading of the current meter are recorded. Also data position of buoy by GNSS
is recorded. Accurately calculated velocity and heading of buoy by using GNSS
data to be used as a criterion to evaluate the current meter velocity and
heading. Finally, the calibration equation that is known as the final result of
the calibration process was determined for velocity and heading of current
meter with reasonable accuracy. Also, current meter is tested in this paper
evaluated commercial method in calibration laboratory. The results were
compared with the results of the proposed method. The results indicated the
success of the GNSS-based method for the Performance analysis of a marine
current meter.
Keywords: Current Meter
Calibration; GNSS; Heading; Doppler Velocity; Relative Kinematic Positioning
Author: Vahid Rezaali, Alireza
A. Ardalan
Journal Code: jptsipilgg160015
