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G7 Installation & Operation
Mounting the GNSS antennas
The two GNSS antennas connected to the receiver are used to provide both
positioning and heading information. The correct relative position of the two
antennas with respect to one another, as well as with respect to the vehicle's
body will impact the heading accuracy.
Antenna Installation Location
The selection of the GNSS antenna installation location is essential to the
receiver's performance. In addition to paying attention to electromagnetic
interference, please follow the guidelines below:
1. Choose an antenna location with a clear view of the sky so each satellite
above the horizon can be tracked without obstruction.
2. Mount the antenna on a secure, stable structure capable of safe
operation in the specific environment.
3. Ensure the antenna cannot move due to dynamics.
4. Mount the primary and secondary antennas as far apart as possible. A
minimum separation distance of 1 meter is recommended.
Mounting Orientation
The G7 outputs position, heading, pitch, heave, and roll readings regardless of
the orientation of the new antennas. The relation of the antennas to the
vessels axis or vehicles axis will determine whether a heading, pitch, and roll
bias needs to be entered.
Parallel Orientation
The typical installation is to orient the antennas in parallel to, and along the
centerline of the axis of the board or vehicle, which results in the unit providing
a true heading. If the vessel has a gyrocompass, one can enter a heading bias
in the G7 to calibrate and match the installed heading to the true heading of the
vessel.
Perpendicular Orientation
The G7 can also be install in such a way so the antennas are oriented
perpendicular to the centerline of the boat's or vehicle's axis. In such case, a
heading bias of +90° need to be entered if the primary antenna is installed on
the starboard side of the boat and -90° if the primary antenna is on the port
side of the boat. Alternatively, if a vehicle installation, +90° if the primary
antenna is installed on the right side of the vehicle and -90° if the primary
antenna is on the left side of the vehicle. Additionally, a pitch/roll bias may
have to be entered, and confirmed by independent calibration tests, to properly
output precise pitch and roll values.
Selecting optimal antenna placement
Document PN 29010107 V1r1
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