Journal of Deep Space Exploration >

2020 , Vol. 7 >Issue 4: 332 - 339

DOI: https://doi.org/10.15982/j.issn.2095-7777.2020.20200026

Topic：Very Long Baseline Interferometry Technology

High-Precision VLBI Orbit Measurement Technology in the Chang'E-4 Mission

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  • 1. Shanghai Astronomical Observatory，Chinese Academy of Sciences，Shanghai 200030，China;
    2. University of Chinese Academy of Sciences，Beijing 100049，China;
    3. Shanghai Key Laboratory of Space Navigation and Positioning Techniques，Shanghai 200030，China;
    4. Key Laboratory of Planetary Sciences，Shanghai Astronomical Observatory，Shanghai 200030，China;
    5. Xinjiang Astronomical Observatory，Chinese Academy of Sciences，Urumqi 830011，China;
    6. National Astronomical Observatory，Chinese Academy of Sciences，Beijing 100101，China;
    7. Yunnan Astronomical Observatory，Chinese Academy of Sciences，Kunming 650011，China

Received date: 20 May 2020

Revised date: 25 Jun 2020

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Abstract

Chang'E-4（CE-4）achieved the soft landing and patrol survey on the far side of the Moon for the first time in the world. The S-band ΔDOR measurement technology is used in the relay satellite mission，and the new S-band ΔDOR observation data processing system is developed. During the prober mission，the VLBI system realized fast time-sharing observations for the relay satellite and lander-rover combination prober for the first time；and the Tianma radio telescope is used to calibrate the relay satellite antenna in orbit. Considering the characteristics of CE-4，the key technical issues to be solved by the VLBI technology are analyzed，and specific measures are proposed. The analysis of the measurement results during the real-time mission of the two spacecraft show that these technical measures play important roles in the accomplishment of mission goals.

Key words： Chang’E-4; VLBI; ΔDOR; antenna pointing calibration

Cite this article

WANG Guangli, HONG Xiaoyu, LIU Qinghui, LI Bin, MA Jun, SU Yan, HAO Longfei . High-Precision VLBI Orbit Measurement Technology in the Chang'E-4 Mission[J]. Journal of Deep Space Exploration, 2020 , 7(4) : 332 -339 . DOI: 10.15982/j.issn.2095-7777.2020.20200026

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