Algorithm Implementation and Result Analysis of Network-RTK Based on GPS／BDS
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摘要: 随着GPS现代化的发展以及中国北斗二代的实施,GPS／BDS组合导航系统在各个行业领域和亚太地区各个国家得到日益广泛的应用,国际海运事业无线电技术委员会（RTCM）增加了北斗卫星导航系统（BDS）星历电文并支持BDS载波相位差分应用使得北斗的地基增强系统在各行业中的应用更加重要。本文介绍相对定位基本模型,单基站实时运态（RTK）与多基站RTK基本原理以及虚拟参考站（VRS）定位方法,通过采集GPS／BDS观测值,分析单基站RTK与多基站定位结果。结果表明,若流动站与基准站距离较短,多基站与单基站定位精度均能得到厘米级定位结果;在流动站与基准站距离较长时,GPS／BDS双频多基站RTK的定位精度能达到厘米级定位结果,可用性强。Abstract: With the development of GPS modernization, as well as the implementation of China's BDII, GPS／BDS integrated navigation system in the field of various industries and countries in the asiapacific region are increasingly widespread application, RTCM increased the BDS ephemeris message and support BDS carrier phase difference makes the big dipper foundation system is more important to its application in various industries. In this paper, the basic model of relative positioning, a single base station RTKwith multiple base stations gps-rtk basic principle as well as the VRS positioning method, through collecting GPS／BDS observation,analysis of single base station of RTK and base station positioning results.The results show that if the distance between the station and the base station is shorter, both multi-base station and single base station positioning accuracy can be obtained by the centimeter-level positioning results. The positioning accuracy of GPS／BDS dual-frequency multi-station RTK can reach the accuracy of centimeter-level and can be of high availability when the distance between the mobile station and the base station is longer.
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Key words:
- Relative positioning /
- RTK /
- VRS
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