Analysis and Research on Handheld GPS Navigation and Positioning Accuracy
In order to solve the problem of hand-held GPS magnitude traceability,this paper studies and analyzes the hand-held GPS navigation and positioning accuracy from the baseline field observation pier fixed distance di-rect comparison method,pier coordinate point method and indoor portable navigation signal source meth-od.Experimental results show that the fixed distance of observation pier in baseline field can be controlled within±5m.The coordinate point method of observation pier is greatly affected by the external environmental conditions,re-sulting in a significant decrease in measurement accuracy(within±10m).Indoor portable navigation signal source method is less affected by external environmental conditions,the measurement accuracy is high,and the control is within±3m,meeting the accuracy level of±5m detection requirements.
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