手持GPS导航及定位精度分析研究

Analysis and Research on Handheld GPS Navigation and Positioning Accuracy

为解决手持GPS量值溯源难题,本文从基线场观测墩固定间距直接比较法、观测墩坐标点法及室内便携式导航信号源法,对手持GPS导航及定位精度进行研究分析。实验证明:基线场观测墩固定间距比较法可将其控制在±5m以内;观测墩坐标点法受外界环境条件影响较大,造成测量精度(±10m以内)明显下降;室内便携式导航信号源法受外界环境条件影响较小,测量精度较高,且控制在±3m以内,满足精度等级±5m检测需求。

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 direct comparison method,pier coordinate point method and indoor portable navigation signal source method.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,resulting 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.