基于CORS的网络RTK测量精度分析及影响因素研究

Analysis of Measurement Accuracy and Influence Factors of Network RTK Based on CORS

随着各种先进科学技术在测绘行业中的应用,测绘已经从传统的劳动力密集型行业逐渐向数字化、智能化、信息化转变。传统作业方式采用全站仪、水准仪获取碎部点的平面位置和高程,现阶段利用网络RTK作为碎部点三维坐标的获取手段,不仅使得地形图测绘更加高效,而且大大降低了作业成本。然而在提升效率的同时不能降低点位精度。本文实验并通过实地采集数据,分析影响基于CORS的网络RTK测量精度的主要因素,实验结果表明:基于CORS的网络RTK测量精度主要受CORS系统播发的差分改正数质量、流动站观测条件等因素的影响。

With the application of various advanced science and technology in surveying and mapping industry,surveying and mapping has been gradually transformed from the traditional labor-intensive industry to the current digital,intelligent,information technology.In the traditional operation mode,total station and level are used to obtain the plane position and elevation of the ground point.At present,network RTK is used as the acquisition method of three-dimensional coordinates of the ground point,which not only makes more efficient,but also greatly reduces the cost in topographic map mapping.Yet,the point accuracy cannot be reduced while improving the efficiency.This paper analyzes the main factors affecting the measurement accuracy of CORS-based network RTK by collecting data on the ground.The experimental results show that the measurement accuracy of network RTK based CORS is mainly affected by the quality of difference correction broadcast by CORS system and the observation conditions of flow stations.