HOW GOOD IS GPS?

 

GPS Positioning Modes

 

The main positioning modes can now be identified:

ABSOLUTE or POINT positioning: coordinates in relation to a well-defined global reference system.

DIFFERENTIAL or RELATIVE positioning: coordinates in relation to some other fixed point. In GPS surveying this is referred to as baseline determination.

STATIC positioning: coordination of stationary points, either in the absolute or relative mode. Relative static positioning is generally synonymous with the SURVEYING mode of operation, and is based on the analysis of carrier phase observations.

KINEMATIC positioning: coordination of moving points, either in the absolute or relative mode. This is the NAVIGATION mode of positioning, and is based on the use of pseudo-range observations.



The basic GPS positioning modes.


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© Chris Rizos, SNAP-UNSW, 1999