基线长度对GNSS单历元解算定位精度影响的多元统计分析  

The Impact of Baseline Length on the Positioning Accuracy of Single-Epoch GNSS Solutions:A Multivariate Statistical Analysis

作　　者：张永明 张永荥 李春林 毛亚萍 朱磊 许婷 Zhang Yongming;Zhang Yongying;Li Chunlin;Mao Yaping;Zhu Lei;Xu Ting(Qinghai Provincial Institute of Basic Surveying and Mapping,Xining 810000,China;Qinghai Provincial Key Laboratory of Geospatial Information Technology and Application,Xining 810000,China)

机构地区：[1]青海省基础测绘院,西宁810000 [2]青海省地理空间信息技术与应用研究重点实验室,西宁810000

出　　处：《青海科技》2024年第6期42-46,共5页Qinghai Science and Technology

摘　　要：当前采用GAMIT的TRACK模块进行全球导航卫星定位系统(GNSS)单历元定位,并利用多元统计分析方法系统性分析其精度的学者较少。鉴于此,文章以50km为距离间隔,选取了青海省北斗卫星导航定位基准站网(QHCORS)中的17个基准站的原始数据,通过TRACK模块获取了单历元解算不同方向及整体精度,通过相关性分析和回归分析方法研究了基线长度对解算成果精度的影响。结果表明:基线长度对东西方向、高程方向及整体解算精度有较大影响,随着基线的增长,影响越大,两种分析方法分析所得结果相同。Currently,there are few scholars employing the TRACK module of GAMIT for single-epoch positioning with Global Navigation Satellite Systems(GNSS)and using multivariate statistical analysis methods to systematically analyze its accuracy.In light of this,this paper selected original data from 17 reference stations within the Qinghai BeiDou Satellite Navigation Positioning Datum Station Network(QHCORS),with intervals of 50 km between stations.Through the TRACK module,single-epoch solutions were obtained to determine accuracy in different directions as well as overall accuracy.By applying correlation analysis and regression analysis methods,the study investigated the impact of baseline length on the precision of the computational results.The findings indicate that baseline length significantly affects the east-west direction,elevation direction,and overall computational accuracy;the influence increases with the lengthening of the baseline.Results derived from both analysis methods were consistent.

关 键 词：GNSS QHCORS 单历元解算 相关性分析 回归分析 

分 类 号：P228.4[天文地球—大地测量学与测量工程]