Analysis of DOP and its preciseness in GNSS position estimation
If we accept lower elevation mask angle, several more satellites are available and DOP values drop to about its ideal value. The main motivation for this work is to introduce with the concept of DOPs: GDOP, PDOP, HDOP, VDOP, TDOP and to derive a comparative conclusion on DOP among GPS, Galileo and combined GPS - Galileo satellite configuration.
GPS Accuracy: HDOP, PDOP, GDOP, Multipath & the Atmosphere
A Guide to GPS Accuracy HDOP/PDOP, multipath and atmospheric effects are some of the common sources of GPS error. All of these types of GPS errors could lower GPS accuracy. With the selective availability switch now turned off, we have gained significant improvements in GPS accuracy.
Accuracy of GPS and HDOP - Geographic Information Systems Stack Exchange
It seems you already determined both PCE (2 m) and HDOP (1.2). The only unknown left is URE, which is this case equals URE = HPCE / HDOP = 1.67 m. Now with that information at hand, you can assume the URE will not change, then predict the PCE of interest given DOP predictions, as given in GPS survey planning software.
Dilution of precision (navigation)
The effect of geometry of the satellites on position error is called geometric dilution of precision (GDOP) and it is roughly interpreted as ratio of position error to the range error. Imagine that a square pyramid is formed by lines joining four satellites with the receiver at the tip of the pyramid.
GPS Accuracy Explained - VDOP TDOP GDOP HDOP PDOP - the5krunner
There are 4 kinds of DOP: Geometric or Position (3D) dilution of precision (GDOP or PDOP – 3D); Horizontal dilution of precision (HDOP); Vertical dilution of precision (VDOP); and Time dilution of precision (TDOP). The maths behind a better spread of satellites means that you get less dilution and hence a better signal.
