Geometric Dilution of Precision, see DOP.
Geometric Dilution of Precision. The accuracy of a GPS receiver's readings can be diluted by unfavorable satellite position. A GPS receiver determines position by triangulation, much like a hiker determines his/her position on a map, visually, by finding the bearings of three landmarks, drawing an imaginary line between himself and each of the landmarks, and determining his position as the point where the lines intersect. If the landmarks are too close together, or they're obstructed from view, the hiker won't get a very accurate idea of his position. When the GPS satellites that are being received are clustered too close together, or most of the satellites are blocked by terrain or other obstacles, the positional accuracy determined by the receiver is diluted. The wider the angle between satellites, the better the measurement. Good GPS receivers will analyze the angles between all of the satellites available and choose the four that are best positioned to reduce the margin of error.
The relationship between errors in user position and time and in satellite range.
geometric dilution of precision. an intentional error controlled by the DOD to reduce the accuracy of GPS receivers. This inaccuracy requires the use of differential correction to achieve the level of precision required for the site-specific management.
Geometric (three coordinates plus clock offset)
See Geometric Dilution of Precision
Geometric Dilution of Precision. A factor that modifies the error in the GPS position based on satellite configuration and timing. [Chapter 5
Geometric Dilution of Precision. Term quantifying the effect of satellite geometry (relative positions of several satellites) on the magnitude of error in a GPS position measurement.