摘要
针对历元地球参考框架在确定站点高频非线性运动和季节性变化方面具有国际地球参考框架不具备的优势问题,该文通过比较两种技术间组合策略建立的多源融合历元地球参考框架的精度,研究DORIS对于多源融合历元地球参考框架的影响。通过基于坐标的法方程叠加方法进行技术内法方程叠加和技术间组合,并利用并置站条件联系不同技术的法方程,从而建立多源融合历元地球参考框架。结果表明,DORIS的引入并不会对多源融合历元地球参考框架的基准定义或其他3种技术站点的点位精度产生较大的影响,同时能够体现4种技术中精度较差的DORIS对于ETRF的精度及稳定性的影响。
Aiming at the problem that the epoch terrestrial reference frame(ETRF)has its unique advantages on station's high frequency and non-linear motion compared to ITRF,by comparing the accuracy and stability of the multi-technique ETRF constructed by two kinds of inter-technique normal equations stacking strategies,this paper studied on the influence of DORIS to multi-technique ETRF.By means of the method of normal equations stacking on coordinate level,the intra-technique normal equations stacking and inter-technique normal equations stacking were carried out,using local ties to connect different normal equations,so as to construct the multi-technique ETRF.The result showed that DORIS did not have a significant influence on datum definition of the multi-technique ETRF or coordinate precision of other sites,it reflected the influence of DORIS,which had relatively poor precision in four techniques,on the accuracy and stability of ETRF.
作者
邢云剑
程鹏飞
成英燕
姚向东
XING Yunjian;CHENG Pengfei;CHENG Yingyan;YAO Xiangdong(Chinese Academy of Surveying and Mapping,Beijing100036,China;Gansu Provincial Transportation Research Institute Co.,Ltd.,Lanzhou 730070,China)
出处
《测绘科学》
CSCD
北大核心
2019年第7期1-8,共8页
Science of Surveying and Mapping
基金
国家重点研发计划项目(2016YFB0501405)
