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F180R MOTION Sensor User and Reference Guide
5.3.4 Primary Antenna Mounting
Figure 80: MOTION Settings Wizard - Primary Antenna Mounting
The mounting offsets define the location of the primary antenna relative to the F180R System
IMU. The reference for these measurements is the F180R System IMU measure point, which is
also shown on top of the F180R System, to the phase centre of the primary antenna in the
Vessel Frame of Reference. You must measure each of the GNSS offset distances and ensure
they are measured to within the maximum specified accuracies. The accuracy field tells the
system how accurately the measurement has been made. You should measure the GPS Offsets
as accurately as possible, and certainly to within 0.5m if not providing DGPS or RTK corrections
and to within 1m if DGPS or RTK corrections are being provided.
When you specify the mounting direction and the offset the system image will show the
position of the antenna relative to the F180R System IMU.
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