Dilution of Precision (DOPS)

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Dilution of Precision (DOP) is a term used in satellite navigation and geomatics to describe the geometric strength of satellite configuration used to determine a receiver’s position. The term is also used to describe the impact of satellite geometry on positional measurement precision.

Types of DOP

There are four main types of DOP:

1. Geometric Dilution of Precision (GDOP): The ratio of the volume of the 3D error ellipsoid to the volume of the horizontal error ellipse.

2. Position Dilution of Precision (PDOP): The ratio of the 3D position error to the horizontal position error.

3. Horizontal Dilution of Precision (HDOP): The ratio of the horizontal position error to the 2D horizontal position error.

4. Vertical Dilution of Precision (VDOP): The ratio of the vertical position error to the horizontal position error.

References

• Dilution of Precision on Wikipedia