Surveying Instruments - Practical Boundary Surveying - page 74

Fig. 5.12 Static GPS receiver capable of centimeter level accuracy
Occupation times increase as the distance between receivers increases. After the
data is collected, it is uploaded into a personal computer for Post-Processing .
During the post-processing phase, the software will make the necessary adjust-
ments and corrections and calculate coordinates for the occupied points. Accuracy
for static GPS 1 can be about one centimeter horizontal and approximately 2-4 cm
vertical, however environmental factors may reduce this accuracy in practical
1 Based on a 95 % confidence level. See Standards and Guidelines for Land Surveying
using Global Positioning System Methods, August 6, 2004. The Survey Advisory Board for
Washington State Department of Natural Resources.