GDOP (geometric dilution of precision) or PDOP (position dilution of precision) describes error caused by the relative position of the GPS. The full explanation is as follows: Thus, PDOP is Position of DOP and can be thought of as 3D positioning or the mean of DOP, and most often referred to in GPS; HDOP is Horizontal of DOP; VDOP is Vertical of DOP. Dilution of precision, or geometric dilution of precision, is a term used in satellite navigation and geomatics engineering to specify the Error propagation as a mathematical effect of navigation satellite geometry on positional measurement. HDOP – horizontal dilution of precision · VDOP – vertical dilution of precision · PDOP – position (3D) dilution of precision · TDOP – time dilution of precision · GDOP –. Geometric or Position (3D) dilution of precision (GDOP or PDOP – 3D); · Horizontal dilution of precision (HDOP); · Vertical dilution of precision (.

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