摘要
探讨直接利用平差结果分析GPS网起算点的兼容性问题,达到剔除含有粗差已知点的目的。针对短基线(10～15 km以下)工程测量网,总结GPS工程测量网数据处理与质量评估方法。对某铁路工程测量控制网的观测资料进行数据处理与质量评估试验,结果表明:平面点位精度在x方向上优于0.75 cm,y方向上优于0.70 cm,点位精度优于0.90 cm;基线方位角中误差优于0.94″,最弱边长相对精度为3.60 ppm,获得了较高的精度,可为工程应用提供参考和借鉴。
The compatibility problems for known point results is discussed using the results of GPS network adjustment directly,in order to eliminate a known point with gross errors.For short baseline（10～15 km below）of engineering surveying GPS network,it summed up the method of data processing and quality analysis for GPS engineering network surveying network.Taking observations of some railway engineering surveying control network for example,it made testing for data processing and quality evaluation.The results showed that： horizontal precision were better than 0.75 cm and 0.70 cm in the x and y direction respectively,and point precision was better than 0.90 cm;and baseline azimuth error was better than 0.94″,and the weakest side of the relative precision was 3.60 ppm.In a word,it obtained high accuracy and could provide reference for engineering applications.
出处
《测绘工程》
CSCD
2011年第4期22-25,30,共5页
Engineering of Surveying and Mapping
关键词
GPS
数据处理
质量评估
短基线
GPS
data processing
quality analysis
short baseline
