Ag Leader Base Station Hardware Manual - Manual (Page 30)

28 AutoSteer System
Determine a Mobile Location
Determine a Mobile Location
The Base Station GPS Antenna receives position measurements from the GPS satellites. The Base Station calculates the
position error and transmits the correction data to the vehicle via an AFLink radio modem link. This radio modem link
requires a line-of-sight between the vehicle and the Base Station. The higher the elevation the Radio Modem Antenna is
positioned in, the more easily a vehicle can receive a clear signal. The Base Station is initially setup in an open field with an
unobstructed view of the sky.
Note: Do not place the Base Station adjacent to large metal structures or vehicles which can reflect the GPS signals and
cause interference and multipathing.
Figure 3-1 Improper Mobile Base Station Positioning
Note: To resume using AutoSteer system products on the same rows you need to set the Base Station GPS Antenna up in
the exact location as when you originally worked in that field. This is true whether it is the next day or the next season.
We strongly suggest creating a semi-permanent mounting for each field site so the Base Station can be precisely relocated
for future use. See the Marking the Base Station's GPS Antenna Location section on page 4 of the Introduction chapter for
descriptions of Base Station mounting methods.
Base Station Components
The AFLink Mobile Base Station components are shown in Figure 3-2 and defined in Table 3-1.
Note: The Mobile Base Station kit and AFLink Base Radio Modem kit are purchased separately. The Radio Modem kit
will vary depending on the frequency required for the system’s region of operation.