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Reference.org
Dilution of precision (navigation)
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<p>Dilution of precision (DOP), or geometric dilution of precision (GDOP), is a term used in <a href="/facts/Satellite_navigation/lVgPlF5v">satellite navigation</a> and <a href="/facts/Geomatics_engineering/Ig6LVnpJ">geomatics engineering</a> to specify the <a href="/facts/Error_propagation/jJE2dzYB">error propagation</a> as a mathematical effect of navigation satellite geometry on positional measurement precision. </p>