基于珠海北斗CORS系统的高程测量研究与应用

Research and Application of Elevation Measurement Based on Zhuhai Beidou CORS System

CORS系统可以准确、快速地实现城市测量中的三维精确定位,大幅提高野外测绘作业的效率。本文研究了珠海北斗CORS系统在临近海域范围内高程测量的应用,分析了GPS/GPS+GLONASS和GPS+GLONASS+BDS两种组合定位模式下的定位精度,并与传统四等水准测量结果对比分析。结果表明:珠海北斗CORS在临近海域范围内高程测量性能稳定,两种组合定位模式高程测量精度能达到四等水准的精度要求,GPS+GLONASS+BDS定位模式精度更高。

The CORS system can accurately and quickly achieve three-dimensional precise positioning in urban surveys,and greatly improve the efficiency of field surveying and mapping operations.This paper studies the application of the Zhuhai Beidou CORS system in the elevation measurement in the vicinity of the sea area,analyzes the positioning accuracy under the two combined positioning modes of GPS/GPS+GLONASS and GPS+GLONASS+BDS,compares and analyzes with the traditional fourth-level leveling measurement results.The results show that Zhuhai Beidou CORS has stable elevation measurement performance in the vicinity of the sea area.The height accuracy of the two combined positioning modes can reach the fourth-level accuracy requirement.The GPS+GLONASS+BDS positioning mode has higher accuracy.