Ellipse
– Operating Handbook
ELLIPSEOHAIR
Dual GPS Antenna Placement
Dual antenna systems installation will require special care in order to obtain optimal
performance:
●
Same antenna type, same cables with identical lengths must be used for both
antennas.
●
Both antennas must be turned the same way (connectors oriented in same direction)
●
Both antennas must have the same view of sky when mounted on the vehicle.
●
Both antennas must be placed on a ground plane (typically the aircraft's roof or wings,
horizontal bars), more than 10cm away from the ground plane's edges.
Once installed, the main GPS antenna lever arm must be measured. It is the signed distance,
expressed in the vehicle coordinate frame, from the Ellipse center of measurements, to the
main GPS antenna. It must be measured within 5cm accuracy. Then, the same should be done
for the second antenna.
Precise lever arms can also be estimated in Post processing using Qinertia.
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Antenna 1
Antenna 2
