Microsoft KB Archive/148403

GPS Err Msg in Automap: Inaccuracy of Solution

PSS ID Number: Q148403 Article last modified on 05-16-1996

4.00

WINDOWS

= SYMPTOMS =

When you are running Road Atlas or Streets version 4.0, you receive one of the following error messages:

Inaccuracy of solution no solution

-or-

Inaccuracy of solution greater than 500 meters

These messages occur when you are using a Global Positioning System (GPS) receiver.

= STATUS =

The error messages indicate the Geometric Dilution of Precision (positional fix based on signal strength) is too great, or that not enough satellites have been located to perform an accurate positional fix.

These error messages are not indicators of a problem with the GPS receiver or software. The messages are simply reporting that the signals received are inadequate for producing an accurate fix on your location.

= RESOLUTION =

This is not a problem with the GPS application.

The solution for either of these problems is to relocate the GPS receiver to a location better suited for of communicating with the satellites.

For example, you may want to move away from the following:


 * Tall buildings.
 * Ravines.
 * Strong Radio Interference.

After you relocate the receiver, wait for a clearer signal.

= MORE INFORMATION =

The Geometric Dilution of Precision, explained in the introduction to GPS documentation included in most GPS software, is a measurement of how accurate the GPS receiver can determine its position based on the signals received.

Tall buildings or steep terrain may cause reflections and echoes of genuine GPS signals. These signals can cause the receiver to calculate inaccurately. When this occurs, or if the GPS receiver cannot tune in a sufficient number of satellites to calculate an accurate position, the error messages can occur.

KBCategory: kbmm kbui kbusage kbprb kberrmsg KBSubcategory:

Additional reference words: 4.00 4.00a auto auto-map automap reference

=
================================================================ Copyright Microsoft Corporation 1996.