VLBI归心测量中靶标覆盖均匀度的影响分析  

Analysis of the influence of taryd caverage evennea in VLBC site survey

作　　者：马小辉 张丽萍[2,3] 张志斌[4] 王华 MA Xiaohui;ZHANG Liping;ZHANG Zhibin;WANGH Hua(Institute of Geospatial Information,Information Engineering University,Zhengzhou 450001,China;Xi'an Research Institute of Surveying and Mapping,Xi'an 710054,China;State Key Laboratory of Geo-Information Engineering,Xi'an 710054 China;Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 200030,China)

机构地区：[1]信息工程大学地理空间信息学院,河南郑州450001 [2]西安测绘研究所,陕西西安710054 [3]地理信息工程国家重点实验室,陕西西安710054 [4]中国科学院上海天文台,上海200030

出　　处：《测绘科学与工程》2020年第1期11-16,共6页Geomatics Science and Engineering

摘　　要：本地连接参数的测量一般通过高精度的大地测量作业来完成,而VLBI天线参考点的位置是计算本地连接的一个关键因素。在参考点测量过程中,靶标观测的均匀性对参考点测量精度有十分显著的影响。靶标观测散点越多,参考点解算精度越高;靶标观测散点分布越均匀,参考点解算精度越高。因此,在归心测量数据解算过程中,应该尽可能采用更多的均匀分布靶标数据。本文采用南山站25m轮轨式VLBI天线参考点测量靶标点数据,通过多种分组组合解算,分析了靶标观测散点数据的分布情况对归心解算的影响,推算了射电天线参考点解算的系统性误差估计,对VLBI天线参考点解算过程的系统误差建模具有重要的参考价值。The local-tie parameters are usually determined,omed by high-precision field survey,and the location of VLBI telescope reference point is a key factor in the calculation of local-tie.In the process of reference point survey,the evenness of target data has a significant impact on the accuracy of reference point.To be specific,the accuracy of reference point will be improved with more and evenly distributed scattered target data,and that kind of data should be used as much as possible.In this paper,the target data of 25 m wheel rail VLBI antenna in Nanshan station is used to calculate location of the target point,and the influence of the distribution of the scattered target point data in site survey is analyzed through a variety of group combination solutions.The systematic error of the reference point of the radio telescope is calculated,which can provide reference for the systematic error modeling of the solution process of the VLBI telescope reference point.

关 键 词：VLBI 归心测量 参考点 靶标 均匀度 

分 类 号：P228[天文地球—大地测量学与测量工程]