Klein Marine Systems, Inc. HYDROCHART 3500, Руководство по эксплуатации и обслуживанию

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D-1
APPENDIX D: C
OLLECTING
D
ATA FOR
B
ATHYMETRY
C
ALIBRATION
The HydroChart 3500 Sonar System should be calibrated for its electronic and
transducer channel phase mismatch so that the phase offsets can be compensated
for in the bathymetry processing. The calibration processing is conducted by Klein
Marine Systems using side scan data collected over a nearly flat sea floor.
However, the data collection can also be performed by the operator and the data
sent to Klein Marine Systems for generation of a calibration (CAL) file, a file with
extension
.cal . This section includes a procedure for collecting the data. The data
collection must be performed and the CAL file generated to ensure optimum
bathymetry results. Every system requires a unique CAL file to be used in the
bathymetry processing.
To collect the data:
1.
Deploy the Sonar Head Unit to a depth of about 2 meters over a flat bottom in
water depth of 7 to 15 meters. Ensure that it is also 1 meter below the survey
vessel’s hull and that no obstacles are in the way of the transducers as shown
in Figure D-1.
2.
Set the sonar range to 75 meters.
3. Collect the side scan data, as well as motion sensor and navigation data, in three
parallel lines, reversing the direction at the start of each. The line separation
should be 40 to 50 meters, and the line length should be at least 150 meters as
shown in Figure D-2.
4. Send the data to
Klein Marine System
s, Inc. for generation of the CAL file.
Figure D-1:
Sonar Head Unit Deployed One Meter below Survey Vessel's Hull
>1 m