摘要
本文对全球网GNSS基准站坐标解算中用于确定参考框架的全球IGS站个数、基准站在不同分区中的计算差异以及松弛解算中的坐标约束条件大小进行了分析和计算比较.结果表明：确定参考框架的全球IGS站个数变化会对国内基准站坐标产生系统性偏差,站点个数越少,偏差越大,建议采用尽可能多的全球均匀分布的IGS站进行约束;基准站在不同分区中解算,坐标不存在明显的系统性偏差,计算中可以进行分区处理＇松弛解约束条件不同会对基准站坐标产生系统性偏差,建议采用松约束.
In this paper, the number of IGS stations are used to determine the reference frame, and calculation differences of the base stations in different partitions and the coordinate constraints of relaxation solution in the coordinate solution of GNSS base station are analyzed and compared. The results show that the changing number of IGS stations will produce a systematic deviation on the domestic base station coordinates. The less the number of IGS stations are, the greater the deviation will be. So it is suggested that it is better to use as many IGS stations as possible for coordinate constraints. It also shows that there is no obvious systematic deviation in the base station coordinates in different partitions, so calculations can be conducted by partitions processing. Furthermore, the constraint differences in relax solution can bring a systematic deviation to the base station coordinates, so it is suggested to adopt relax constraints.
作者
吴富梅
刘光明
Wu Fumei1,2, Liu Guangming 1,2(1. State Key Laboratory of Geo-Information Engineering, Xi＇an 710054, China;2. Xi＇an Research Institute of Surveying and Mapping, Xi＇an 710054, Chin)
出处
《测绘科学与工程》
2018年第2期6-10,共5页
Geomatics Science and Engineering
基金
国家自然科学基金资助项目（41374003,41474015）.
