The Experiment and Analysis on VLBI Observations of Space Passive Hydrogen Maser

Q4 Physics and Astronomy

Chinese Astronomy and Astrophysics Pub Date : 2022-07-01 DOI:10.1016/j.chinastron.2022.09.009

WANG Zhi-chao , LIU Qing-hui , ZHENG Xin , ZHANG Juan , XIE Yong-hui , DENG Tao , JIANG Jian-hua , ZHANG Chao , WANG Ling-ling , LIANG Yue

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引用次数: 2

Abstract

China plans to establish a lunar orbital VLBI (Very Long Baseline Interferometer) station around 2025, which will carry a space passive hydrogen maser as the time and frequency reference. Since it is the first time to use a space passive hydrogen maser for VLBI observation, its feasibility needs to be studied and verified. Therefore, we carried out VLBI observations using the space passive hydrogen maser as the frequency reference. In the experiment, the active hydrogen atomic clock and space passive hydrogen maser were used as the frequency standard, and the alternate VLBI observations of China’s Mars probe TW1 (Tianwen 1) were carried out using the 25 m radio telescope at Sheshan, Shanghai, and other VLBI stations. The results of data processing and analysis show that the standard deviation of VLBI residual group delay based on both active hydrogen atomic clock and space passive hydrogen maser are within 0.5 ns, which indicates that the space passive hydrogen maser can meet the accuracy requirements of VLBI measurement for deep space exploration, and verify its feasibility as the frequency standard of lunar orbital VLBI stations.

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空间无源氢脉塞VLBI观测的实验与分析

中国计划在2025年左右建立一个月球轨道VLBI(甚长基线干涉仪)站，该站将携带一个空间被动氢脉泽作为时间和频率参考。由于首次使用空间被动氢脉泽进行VLBI观测，其可行性有待进一步研究和验证。因此，我们以空间被动氢脉泽为频率基准进行了VLBI观测。实验以主动氢原子钟和空间被动氢脉射器为频率标准，利用中国火星探测器TW1号(天文1号)在佘山、上海等VLBI站点的25 m射电望远镜进行了VLBI交替观测。数据处理分析结果表明，基于主动氢原子钟和空间被动氢激射器的VLBI剩余群延迟的标准差均在0.5 ns以内，表明空间被动氢激射器能够满足深空探测VLBI测量的精度要求，验证了其作为月球轨道VLBI站频率标准的可行性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Chinese Astronomy and Astrophysics Physics and Astronomy-Astronomy and Astrophysics

CiteScore

0.70

自引率

0.00%

发文量

期刊介绍： The vigorous growth of astronomical and astrophysical science in China led to an increase in papers on astrophysics which Acta Astronomica Sinica could no longer absorb. Translations of papers from two new journals the Chinese Journal of Space Science and Acta Astrophysica Sinica are added to the translation of Acta Astronomica Sinica to form the new journal Chinese Astronomy and Astrophysics. Chinese Astronomy and Astrophysics brings English translations of notable articles to astronomers and astrophysicists outside China.