BDS/GPS/GLONASS中距离RTK算法研究
Research on BDS/GPS/GLONASS Medium-range RTK Algorithm
刘扬 1任思思 1李帅 1纪元月1
作者信息
- 1. 黑龙江地理信息工程院,黑龙江哈尔滨150081
- 折叠
摘要
针对中距离RTK基准站与流动站大气延迟误差相关性迅速降低,导致多系统多频全模糊度解算成功率有限、Ratio值过低问题,本文提出了一种估计大气误差的BDS/GPS/GLONASS多频实时动态定位算法,将电离层延迟误差、相对对流层延迟误差和GLONASS频间偏差作为参数估计,采用部分模糊度策略,设置与观测时长有关的连续锁定历元数阈值和模糊度解算截止高度角解算一段22.4 km基线,试验结果表明,通过估计GLONASS频间偏差保证了GLONASS单系统RTK结果的精度,三系统联合定位增加了滤波估计参数个数,但保证了卫星几何构型,提升了定位精度.
Abstract
In response to the rapidly decreasing correlation of atmospheric delay error between medium-range RTK reference station and rover station,which leads to the problem of limited success rate of multi-system multi-frequency full ambiguity solving and low Ratio value,this paper proposes a multi-frequency real-time kinematic positioning algorithm for estimating the atmospheric delay with BDS/GPS/GLONASS Kalman filtering method,which combines the ionospheric delay,relative tropospheric delay error and inter-fre-quency bias of GLONASS system as parameter estimation,adopting a partial ambiguity fixed strategy,setting the threshold of the num-ber of successive fixed epoch related to the observation period and the ambiguity cutoff angle resolution of a section of 22.4 km base-line,the experimental results show that the accuracy of the GLONASS single-system RTK results is ensured by the estimation of the inter-frequency bias of the GLONASS phase observation. The combined positioning of three systems increases the number of filter esti-mation parameters but ensures the satellite geometric configuration and improves the positioning accuracy.
关键词
GLONASS/频间偏差/电离层延迟/对流层延迟Key words
GLONASS/inter-frequency bias/ionospheric delay/tropospheric delay引用本文复制引用
出版年
2024
NETL
NSTL
万方数据