Effect of Forested Terrain on the Positioning Accuracy of GPS
Fei Gao · Zhejiang linye keji · 2011
Test points in various forest terrain were set up for studing effect of topographical factors on accuracy of single point positioning with high-performance GPS receiver and GPS-RTK.The result showed that two kinds of GPS observations had aggregation at the same period and integrity deviation between different periods.Internal and external accord accuracy of single point positioning with Trimble 5 800 in different terrain was 0.512-4.465 m,and influenced by the building and mountain.Better precision could reach decimeter in open area.Mean square error of RTK technology was mostly 1-3 cm,in good terrain condition and the positioning accuracy was similar in the morning and afternoon,but it was lower in closed forest and had not even float solution in bad terrain as valley.