The Precision Analysis of the Chinese VLBI Network in Probe Delay Measurement
The Precision Analysis of the Chinese VLBI Network in Probe Delay Measurement
复制标题
中国VLBI网络探头时延测量精度分析
DOI：
10.1088/1674-4527/ac42bf
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发表时间：
2021-12
影响因子：
1.8
通讯作者：
Juan Zhang
中科院分区：
文献类型：
--
作者：
Ting Li;Lei Liu;Wei-Min Zheng;Juan Zhang
抽象的。提出了一种用于探测延迟测量的甚长基线干涉测量(VLBI)精度评估方法，以研究中国VLBI网络(CVN)中不同组件的误差贡献。该方法借鉴了传统的远距离射电源闭合时延分析的思想。它只考虑了VLBI的闭合延迟，排除了探测器定轨的影响，非常适合用来评估VLBI探测延迟的测量能力。本文首先介绍了闭合延迟分析的基本原理。给出了中国嫦娥五号探月任务和中国火星探测任务CE5和HX1典型观测数据的统计结果，比较了CE5和HX1对CVN中四个封闭基线三角形的闭合延迟精度。结果表明，闭合时延分析中CE5与HX1的精度差异小于定轨后的剩余时延，反映了VLBI时延测量的精度水平。
Abstract. We propose a Very Long Baseline Interferometry (VLBI) precision evaluation method for probe delay measurement, so as to investigate the error contributions from different components in the Chinese VLBI Network (CVN). This method takes the idea of traditional closure delay analysis for distant radio sources. It focuses on the VLBI closure delay only and therefore excludes the influence of probe orbit determination, which makes it very suitable to evaluate the capability of VLBI probe delay measurement. In this paper, we first introduce the principles of closure delay analysis. Then the statistical results of typical CE5 (Chinese Chang’e 5 lunar exploration mission) and HX1 (Chinese Mars exploration mission) observations are presented, including the comparison of the closure delay precisions between CE5 and HX1 for four closed baseline triangles in CVN. According to the result, we realize that the precision discrepancy between CE5 and HX1 in the closure delay analysis is less than that of residual delay after orbit determination, which reflects the precision level of the VLBI delay measurement.
DOI：
10.1002/9783527617845
发表时间：
2016
期刊：
--
影响因子：
--
作者：
通讯作者：
--
影响因子：
4.4
作者：
Nothnagel, A.;Artz, T.;Malkin, Z.
通讯作者：
Malkin, Z.
DOI：
--
发表时间：
1974
期刊：
--
影响因子：
--
作者：
A. Whitney
通讯作者：
A. Whitney