POS MV V4 User Guide
Installation
Copyright © Applanix Corporation, 2009
2-7
The POS MV GNSS antennas may be installed anywhere on the vessel,
provided their locations meet the following criteria:
• Observe the environmental limitations specified on page
2-5, GNSS
Antennas.
• Avoid GNSS antenna locations that may experience multipath
satellite signals caused by reflections off nearby structures.
• Avoid mounting the GNSS antennas where salt deposits can
accumulate and degrade the received signal quality. Remove salt
deposits by washing the antenna with fresh water.
• Do not mount the GNSS antennas closer than 0.5 m (~20 in) to any
radar, UHF, satellite communications or other communications
antennas or transmitters.
• Avoid mounting the GNSS antennas in areas that may experience
high levels of vibration, shock or electrical noise.
• Both antennas must have the clearest possible view of the sky from
horizon to horizon in all directions. This means mounting them
outside and as high as possible on the vessel.
• Mount the GNSS antennas rigidly with respect to each other and with
respect to the IMU within the vessel. This requirement may be difficult
to achieve if the antennas are mounted on separate masts or on a
single mast that can flex with respect to the vessel. Relative
movement of one antenna with respect to the other of more than
0.5 cm (~¼ in), or of both antennas with respect to the vessel, will
introduce an extra source of heading error to degrade the POS MV
heading accuracy.
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