POS MV V4 User Guide
Installation
Copyright © Applanix Corporation, 2009
2-43
Reference to Primary GNSS Lever Arm
Measure and record the distance from your reference point to the centre of
the primary GNSS antenna. Make these measurements to an accuracy of
±0.2 m (~±8 in) for a single frequency unit and to an accuracy of ±0.02 m
(~±¾ in) for a dual frequency (RTK) unit:
• A positive value for the X lever arm means the primary GNSS
antenna is forward of your reference point
• A positive value for the Y lever arm means the primary GNSS
antenna is to starboard of your reference point
• A negative value for the Z lever arm means the primary GNSS
antenna is above your reference point
Reference to Vessel Lever Arm
POS MV uses the main window of the controller program to display its
navigation solution, valid for the point you have defined as the vessel datum.
Measure and record the distance from your reference point to the vessel
datum. Make these measurements to the same accuracy as the Reference to
Primary GNSS Lever Arm to prevent a bias in the position output by POS:
• A positive value for the X lever arm means the vessel datum is
forward of your reference point
• A positive value for the Y lever arm means the vessel datum is to
starboard of your reference point
• A positive value for the Z lever arm means the vessel datum is below
your reference point
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