| Rule #1: No matter what hardware, frequencies, correction techniques, software or antennas …. GPS works best when you have a clear view of the sky. |
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Reflected and bouncing signal paths cause timing delays and errors = poor accuracy
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Rule #2: The opposite is true, when you don’t have clear view of sky (i.e. high buildings) GPS results deteriorate. This is due to “multipath” signal reflections which confuse the receiver and can cause wild position calculations and errors.
This is also known as the “Urban Canyon Effect”. Modern GPS systems with multi-frequencies and more available satellite networks help reduce the effects, but it remains a potential major problem.
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| The GPS receivers have been designed with multi-frequencies and optimal antenna designs but always check out your environment when presenting or Reflected and bouncing signal paths cause timing demo’ing equipment and keep in mind potential land mines due to multipath. |
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