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Error analysis for the Global Positioning System
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<p>The error analysis for the <a href="/facts/Global_Positioning_System/DKVLnzF3">Global Positioning System</a> is important for understanding how GPS works, and for knowing what magnitude of error should be expected. The GPS makes corrections for receiver clock errors and other effects but there are still residual errors which are not corrected. GPS receiver position is computed based on data received from the satellites. Errors depend on geometric dilution of precision and the sources listed in the table below. </p>