Performance of dual one-way measurements and precise orbit determination for BDS via inter-satellite link

IF 0.5 4区物理与天体物理 Q4 ASTRONOMY & ASTROPHYSICS

Open Astronomy Pub Date : 2022-01-01 DOI:10.1515/astro-2022-0034

Jun Zhu, Hengnian Li, Jie Li, Rengui Ruan, Min Zhai

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引用次数: 2

Abstract

Abstract The continuous full operation of the constellation of BeiDou navigation satellite system (BDS) provides favorable conditions for the performance evaluation of the BDS inter-satellite links (ISLs). The primary features of ISLs that affect the precision of precise orbit determination (POD) and time synchronization include (i) the spatiotemporal coverage or continuity of observations; (ii) the observational accuracy, such as observation noise and bias; and (iii) the observational geometry represented by dilution of precision. After comparing some technical features and the current status of the Global Navigation Satellite Systems ISLs, the measurement principle of dual one-way ISLs for BDS and its data processing methods are presented. The performance evaluation involving the above three aspects was carried out using 14 days of ISL data, with some typical indicators derived. POD based on data fusion of ISLs and ground-based L-band monitoring stations was conducted, with root-mean-square of posterior residuals of about 5.0 cm, and MEO radial accuracy better than 1.0 cm. The results show that ISLs offer crucial support for BDS to provide global high-precision services under regional monitoring network conditions.

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通过星间链路实现双单向测量和精确定轨

摘要北斗导航卫星系统（BDS）星座的持续全面运行为北斗星间链路（ISL）的性能评估提供了有利条件。影响精确定轨（POD）精度和时间同步的ISL的主要特征包括：（i）观测的时空覆盖或连续性；（ii）观测精度，如观测噪声和偏差；以及（iii）以精度稀释为代表的观测几何结构。在比较了全球导航卫星系统ISL的一些技术特点和现状后，介绍了用于BDS的双单向ISL的测量原理及其数据处理方法。使用14天的ISL数据进行了涉及上述三个方面的绩效评估，并得出了一些典型指标。基于ISL和地面L波段监测站的数据融合进行POD，后验残差的均方根约为5.0 cm，MEO径向精度优于1.0 结果表明，ISL为BDS在区域监测网络条件下提供全球高精度服务提供了至关重要的支持。

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来源期刊

Open Astronomy Physics and Astronomy-Astronomy and Astrophysics

CiteScore

1.30

自引率

14.30%

发文量

审稿时长

16 weeks

期刊介绍： The journal disseminates research in both observational and theoretical astronomy, astrophysics, solar physics, cosmology, galactic and extragalactic astronomy, high energy particles physics, planetary science, space science and astronomy-related astrobiology, presenting as well the surveys dedicated to astronomical history and education.