Quality of GPS point positioning by TI 4100 receiver

The quality of absolute positioning by the Global Positioning System, using the TI 4100 receiver is investigated. Using 30 min of pseudo-range measurements, the derived coordinates of four tracking stations are estimated with standard errors of the order of 1–9 m. The paper points out that point-positioning users should be aware of the quality of positions and to some extent of the various sources of error.