The swath or multibeam sonar typically has beams that form a fan shape, radiating from the centre of the transducer.
1. Click Transducer1 in the Sensors list box to highlight the selection and display the swath data fields.
2. Type data as needed in the following fields:
• Date: The year and Julian day of current swath time stamp.
• Time: The hour and minute of the current swath time stamp.
• Time Correction: The time correction value.
The X-Y-Z fields set the location of the transducer from the Reference Point (0).
• X: The athwart-ship distance of the transducer, positive to starboard.
• Y: The along-ship distance of the transducer, positive to the bow.
• Z: The vertical distance of the transducer, positive into the water.
The Pitch, Roll and Yaw fields refer to misalignment of the transducer, during mounting, from the vessel coordinate system.
• Pitch: The offset is positive when rotating the transducer towards the bow (bow up).
• Roll: The offset is positive when rotating the transducer away from starboard (starboard down).
• Yaw: Indicates the horizontal rotational offset and is positive for a clockwise rotation.
• Manufacturer: The maker of the transducer.
• Model: The particular make of transducer. The model information is necessary for the calculation of Total Propagated Uncertainty.
• Serial Number: The serial number of the transducer.
Since the Kongsberg data read into HIPS is already corrected, the Transducer values in the HVF must be set as follows: • The X/Y/Z offsets are zero because the Kongsberg data acquisition has already applied static draft and shifted the swath profile to the vessel reference point. • The Roll /Pitch /Yaw transducer mounting rotations are typically zero because the Kongsberg data acquisition has already applied patch test calibration results. |