geometric dilution of precision (GPS) (GDOP)

Geometric Dilution of Precision (GDOP) is a characteristic value from satellite navigation. It is the geometric reduction of the accuracy in position determination, which is due to an obliquely incident satellite signal.

All satellite signals deviating from the orthogonal reduce the accuracy due to the Geometric Dilution of Precision. The degradation of position determination can be reduced by receiving different satellite navigation systems. For this purpose, there are navigation devices that can simultaneously receive two different satellite systems - GPS and Glonass - and reduce the resulting error.

In addition to the GDOP deviation, other deviations that influence position determination are HDOP (Horizontal), PDOP (Position), VDOP (Vertical), TDOP (Time) and RDOP (Relative).