Calibration surveys are performed to allow adjustments of the survey data for parameters such as transducer error (pitch, roll and yaw), and navigation latency. Calibration is performed by visually comparing the effects of various sensor offsets on a set of selected survey lines.
Calibration is done on a set of data specifically surveyed to allow for calculation of minor sensor deviations from established parameters. By running the vessel over known sea bottom topography, at different speeds and directions, correction factors can be derived for various devices on the ship. These corrections are written to the HIPS Vessel File (HVF) and are then used for the duration of the survey mission to ensure correct processing of data.
Calibration can be applied using the Automatic Boresight Calibration function or by using Subset Editor calibration tools.
Related commands:
• Automatic Boresight Calibration
• Calibration Tools in Subset Editor
For the suggested calibration workflow, see: Calibration Workflow