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4.16.5 Setting Position, Speed, and Course Smoothing
· Smoothing can be applied to measured positions, speeds, and courses.
· The higher the smoothing value, the smoother the results will be, but the greater the time lag.
Conversely, if the smoothing value is set low, a great number of changes will occur, but there
will be little time lag. As such, it is important to choose the optimal value for your own usage
situation.
· Smoothing values can be set between 0 and 99 seconds.
· Smoothing can be set individually for position, speed, and course on the JLR-4341.
· Please refer to "4.20 Equipment Configuration" and switch the unit to equipment configuration
mode.
1. Press
, , and then to select "SMOOTHING".
(1) When Position, Speed, and Course can be Individually Set
2. Press to select position, speed, or course, and then press
.
3. Use the numeric keypad to enter the smoothing value, and press
.
(2) When Position, Speed, and Course can not be Individually Set
2. Use the numeric keypad to enter the smoothing value, and press
.
· Setting a high smoothing level to position and speed, can cause the receiver to react
slowly to fast turns and sudden speed changes.
A setting of less than 10 seconds is recommended for normal circumstances, default is
10 seconds. Higher settings must be used in caution.
4.16.6 Setting RAIM
· Receiver autonomous integrity monitoring (RAIM) is an integrity monitoring which determine if
GPS accuracy is within the performance standards to provide an integrity indication.
The integrity indications with a confidence level above 95% for different position accuracy
levels are expressed in two states: "safe" and "unsafe".
In the case of the confidence level under 95%, the indication is expressed "caution".
Safe: position error is within the selected accuracy level.
Caution: insufficient information to reliably calculate for the selected accuracy level.
the probability of false alarms is large or the probability of not detecting an error
condition is large.
Unsafe: position error exceeds the selected accuracy level.
· You can set the RAIM accuracy level.
· You can choose "OFF", "10m", "30m", "50m", or "100m" as accuracy levels.
Set to 30 m or greater when GPS positioning is used alone. If GPS-only positioning is used
with a setting of 10 m, then the 95% reliability condition will not be met, and a "CAUTION" may
occur.
· If you choose accuracy level "OFF", "RAIM OFF" displays on the screen and the RAIM function
will turn off. During "OFF" status, no calculations as to the integrity status of satellites are
made.
· Please refer to "4.20 Equipment Configuration" and switch the unit to equipment configuration
mode.
Procedure
Attention
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