Bathymetric System Calibration and Patch Test
3-15
6.
Start SonarPro.
7.
Verify that the Sonar Head Unit is transmitting by viewing the output pulse in the
Scan window. In addition, and if available, verify that position, motion and sound
velocity data are being displayed in the Information window.
8.
Select the 150-meter range and perform a rub test on the port and starboard
transducers by vigorously rubbing each transducer, one at a time, while observing
the Sonar Viewer window.
The signal amplitudes should be prominent whenever the transducers are
rubbed.
9.
Exit SonarPro.
10.
Turn off the
SonarPro Workstation
and the TPU.
3.10 Bathymetric System Calibration and Patch Test
For new installations it is recommended that a patch test be performed to quantify
any residual biases in the installation which could affect the accuracy of the
bathymetry data. The tests use a series of reciprocal lines run at different speeds,
depths and bottom slopes as inputs to compute the following residual biases:
• Positioning/Latency error
• Pitch bias
• Yaw bias
• Roll bias
For the tests outlined below, all acquired data can be batch processed using the
Klein Batch Processing GUI application and subsequently analyzed using a
third-party application, such as Caris and Hypack. For details regarding the data
interface/conversion, see the Help file in the Klein Batch Processing GUI
application. The tests are listed in the recommended order in which they should be
processed. For example, latency should be processed before pitch, which is
followed by yaw, and then roll. This will eliminate the effects of uncorrected errors
on the other axis.
CAUTION
Serious damage to the Sonar Head Unit electronics may occur
if the Sonar Head Unit is operated on deck for periods longer than fifteen
minutes. Between periods of operation, let the sonar cool for fifteen
minutes. In high temperature climates, protect the Sonar Head Unit from direct
exposure to the sun prior to and during operation.
Summary of Contents for HydroChart 5000
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