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

Journal of Deep Space Exploration ›› 2020, Vol. 7 ›› Issue (4) : 332 -339.

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Journal of Deep Space Exploration ›› 2020, Vol. 7 ›› Issue (4) : 332 -339. DOI: 10.15982/j.issn.2095-7777.2020.20200026
Topic:Very Long Baseline Interferometry Technology
Topic:Very Long Baseline Interferometry Technology

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

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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.

Keywords

Chang’E-4 / VLBI / ΔDOR / antenna pointing calibration

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null. High-Precision VLBI Orbit Measurement Technology in the Chang'E-4 Mission. Journal of Deep Space Exploration, 2020, 7(4): 332-339 DOI:10.15982/j.issn.2095-7777.2020.20200026

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