C-Nav 2050M User Manual - page 59
C-Nav2050 User Guide
Avoid placing the antenna on or near metal or
other electrically reflective surfaces.
Do not paint the antenna enclosure with a
metallic-based paint.
Secure the antenna to the mast firmly to avoid
wind and vibration which can affect the
performance of the C-Nav2050 system.
Avoid placing the antenna near electrical motors
(generators, air conditioners, compressors, etc.)
or other sources of interference such as radar
systems, satcom domes, HF antennas or whip
antennas.
Do not place the antenna too close to other
active antennas. The wavelength of L1 is 0.19m
and L2 is 0.244m. The minimum acceptable
separation between antennas is 1m (39 in),
which provides 6dB of isolation. For 10dB of
isolation, separate the GPS antennas by 2.5m
(8ft), and for 13dB of isolation (recommended)
separate the antennas by 5m (16ft).
Active antennas (those with LNA’s or amplifiers)
create an electrical field around the antenna.
These radiated emissions can interfere with
other nearby antennas. Multiple GPS antennas
in close proximity to each other can create
multipath and oscillations between the antennas.
These add to position error or the inability to
process the satellite signals
Use satellite prediction software with a recent
satellite almanac to assess the impact on
satellite visibility at your location. An L-band
Communication Satellite Locator tool is available
on C-Nav’s website to aid in determining
potential obstructions to the C-Nav Correction
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