High-Precision VLBI Orbit Measurement Technology in the Chang'E-4 Mission ["嫦娥4号"高精度VLBI测轨技术]

作者：Wang G.; Hong X.; Liu Q.; Li B.; Ma J.; Su Y.; Hao L.

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

DOI：10.15982/j.issn.2095-7777.2020.20200026

• Antenna pointing calibration
• Chang'E-4
• VLBI
• ΔDOR

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.

• 单位
  中国科学院大学