Ual; Figure 13: Steadyline Prefer Accuracy; Figure 14: Steadyline Ual- Warning Limit Example - Novatel SMART7 Installation And Operation Manual

SMART7 Operation

3.6.4 UAL

User Accuracy Level (UAL) mode will not function unless UALCONTROL is enabled using
the UALCONTROL command.
The STEADYLINE mode used depends on the BESTPOS and GPGGA solution types.
When the solution type is OPERATIONAL, the receiver uses the Maintain option.
When the solution type is WARNING, the receiver uses the Prefer Accuracy option. When the
receiver changes from WARNING to OPERATIONAL, it will continue to use the Prefer Accuracy
option until any existing offset is gone.
When the solution type is OUT_OF_BOUNDS, the STEADYLINE feature is disabled.
The thresholds used to determine the solution type (OPERATIONAL, WARNING or OUT_OF_
BOUNDS), can be specified using the UALCONTROL command. Refer to the
mands and Logs Reference
Figure 14: STEADYLINE UAL- Warning Limit Example below and Figure 15: STEADYLINE UAL -
Out of Bounds Example on the next page show examples of STEADYLINE using the UAL mode.

Figure 14: STEADYLINE UAL- Warning Limit Example

A Position type is OPERATIONAL.
Higher accuracy corrections are lost. The receiver changes to a lower accuracy solution.
STEADYLINE operates in Maintain mode while the solution accuracy remains within the
Operational limit.
B The solution accuracy exceeds the operational limit. The position type changes to WARNING.
The STEADYLINE mode changes from Maintain to Prefer Accuracy.
SMART7 Installation and Operation User Manual 0C

Figure 13: STEADYLINE Prefer Accuracy

Manual.
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