Specifications

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TROUBLESHOOTING
Shadow Tracker ™ Professional
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Historical Track Display
GPS limitations
Upon viewing a Historical Track plotted on your map, you may notice a slight inaccuracy in
coordinate identification known as
wandering. This inaccuracy is due to atmospheric conditions
and/or other irregularities. This can occur when the Tracking Unit has GPS acquisition, but remains
stationary for an extended period of time. While in motion, accuracy is within approximately 60
meters.
Wandering can be determined whenever movement is indicated in the Track within a 100-
meter circumference, but it is apparent that the Tracking Unit was motionless. Testing indicates
that wandering is more noticeable when the Tracking Unit is static for long periods of time. In
addition, the GPS navigation signal may be periodically unreliable due to circumstances beyond
our control
Lost acquisition of a GPS signal can also be a cause for inaccurate data. Lost acquisition usually
displays as:
• A straight line drawn between two points that show as GPS stops.
• Tracks that obviously does not follow the roadway.
• Stops are an average of less than two-minute intervals.
Another way to determine lost acquisition is if a route shows no Track between two points. The
Track cannot be displayed if the coordinates are not consistent with the route.
N
OTE: Upon viewing the Tracks, if you notice that the travel times are not accurate you should check
the system time on your computer to make sure that it is set for the appropriate time zone.
Technical Support
If you encounter any other problems, please contact ATTI Technical Support.
Technical Support is available Monday – Friday from 8AM – 5PM Central Time*
Tech: [phone]
Fax: [phone]
E-mail: [e-mail]
* Hours subject to change without notice.