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NOTE!: “Flex” is a term that denotes the system switching from one accuracy level to another when a correction
source is lost. In most cases, this happens when the RTK data link between the base station and the GeoSteer system
is interrupted. This could happen due to radio or cell communication loss or an obstacle between the GeoSteer
system and the communication source (ex. base station radio modem or Cell Tower). “Flex” will not help if the actual
GPS signals from the satellites are blocked by obstacles such as trees or buildings.
RTK Only
—This mode is only displayed if the RTK Feature Code has been unlocked on the GeoSteer system. The system
must have a RTK source from a base station via a radio modem or from a NTRIP source via the cell modem. If selected, the
GeoSteer system assumes the operator must be 99.9% sure of position. It requires an RTK link at all times and will disengage
AutoSteering if the link is lost. This setting expects very good satellite geometry and low PDOP. Because of the high
accuracy expectation, the chances that degraded conditions occur and stop AutoSteering is higher. Use this setting only
when high accuracy is required at all times.
Flex High Accuracy
(0-10 cm) (0 to 3.9 inches)—This mode is only displayed if the RTK Feature Code has been unlocked
on the GeoSteer system. The system must have an RTK source from a base station or NTRIP stream. While receiving an RTK
signal, the system is just as accurate as RTK Only mode. However, this mode allows the system to lose the RTK data link from
the base station for a short time and allows the vehicle to continue to AutoSteering. When the RTK signal is lost, the system
will “Flex” back to WAAS/EGNOS or Autonomous Pass-to-Pass until the estimated error gets above 10 cm (3.9 inches). The
amount of time allowed in flex mode depends on GPS conditions. The operator is warned when the system has entered
“Flex” mode and can decide if they wish to continue AutoSteering or wait for the RTK link to be re-established.
Flex Low Accuracy
(0-30 cm) (0 to 11.8 inches)—This mode is only displayed if the RTK Feature Code has been unlocked
on the GeoSteer system. This mode is the same as Flex High Accuracy (0-10 cm) except the system will “flex” until the
estimated error gets above 30 cm (11.8 inches). This will allow a longer period of operation without a RTK signal, but it is
possible the system will have more position error the longer it does not have the RTK signal. As long as the RTK link is
established, the system will be just as accurate as RTK Only. The operator is warned when the system has entered “Flex”
mode and can decide if they wish to continue AutoSteering or wait for the RTK link to be reestablished.
OmniSTAR Only
—This mode is only displayed if the GeoSteer system detects that an OmniSTAR Demodulator has been
installed in the GeoSteer Roof Module. The system will use the OmniSTAR for corrections only and will not “flex” to any
other mode if the signal is lost. The GeoSteer system supports the OmniSTAR XP and HP signals only.
OmniSTAR Flex to WAAS/EGNOS/Autonomous Pass-to-Pass Mode
—This mode is displayed only if the GeoSteer
system detects that an OmniSTAR Demodulator has been installed in the GeoSteer Roof Module. If the system is running
in OmniSTAR mode, the operator has the option to “Flex” back to WAAS, EGNOS, or Autonomous Pass-to-Pass Mode if the
OmniSTAR signal is lost for some reason. The mode the system will “Flex” to will depend on which region the GeoSteer
system is located. WAAS and EGNOS are available in North America and Europe respectively. Autonomous Pass-to-Pass
Mode is available for the rest of the world. Once the OmniSTAR signal has been required, the system will return back to
OmniSTAR mode.
WAAS/EGNOS Only
—This mode is only available where WAAS or EGNOS is available. The GeoSteer system will only use
the WAAS/EGNOS signal for corrections even if an OmniSTAR or RTK signal is available.
Autonomous Pass-to-Pass
—This mode is available in areas where WAAS or EGNOS are not available. The GeoSteer
system will use the GPS signals themselves to calculate reduce the error of the position. This mode allows the system to
run with no correction sources.
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NOTE!: In areas that have WAAS/EGNOS availability, Autonomous Pass-to-Pass is also available. If the system is
switched from WAAS/EGNOS to Autonomous Pass-to-Pass or vice versa, the GeoSteer system must be power cycled
before the change takes effect. If WAAS or EGNOS is available, it is recommended to use those corrections over
Autonomous-Pass-to-Pass.
APPLY
Follow the procedure below to change the Precision Settings:
1.
From the GPS tab, press the Precision Settings button.
2.
Press the Gray Up/Down Arrows or directly select the desired Precision Mode from the Select Precision Mode list.
3.
Press the Apply button to activate the selection.