Spectra Precision SP90m - Azimuth Offset, Antenna Setup & Resulting Heading; Delivering an RTK Position for the Primary Antenna

22
Azimuth Offset, Antenna Setup & Resulting Heading
Consider the following four setups before installing your
antennas. This explanation applies to all types of vehicles
(ship represented in our example).
Depending on the type of measurements you wish the
receiver to perform (heading + roll or heading + pitch) and the
installation possibilities offered aboard the vehicle, you will
choose the most appropriate setup and set the azimuth offset
accordingly.
For each of these setups, if you enter the indicated azimuth
offset, then the receiver will deliver the vehicle’s true
heading, and not the heading value it actually computes.
Delivering an RTK Position for the Primary Antenna
There may be an additional requirement you should take into
account when setting up your antennas which is that the
receiver should also deliver an RTK position for the primary
antenna.
In this case, the absolute location of the primary antenna in
the vehicle is probably critical and this will impact the
location of the secondary antenna as well.
Primary Antenna
Secondary
Antenna
Azimuth Offset= 0°
Secondary Antenna
Primary Antenna
Azimuth Offset= 180°
Primary
Antenna
Azimuth Offset= 270°
Secondary
Antenna
Azimuth Offset= 90°
Secondary
Antenna
Primary
Antenna
Heading+Roll
Computed
Heading+Pitch
Computed
(Red arrow indicates the direction for which heading is measured.)