New high-accuracy spacecraft VLBI tracking using high data-rate signal: A demonstration with Chang'E-3

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• 作者：Huan Zhou ; DeZhen Xu ; ShaoWu Chen ; HaiTao Li…
• 关键词：spacecraft VLBI tracking ; high data ; rate signal ; differential phase delay ; Chang’E ; 3 ; deep ; space navigation
• 刊名：SCIENCE CHINA Technological Sciences
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：59
• 期：4
• 页码：558-564
• 全文大小：720 KB
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• 作者单位：Huan Zhou (1)
  DeZhen Xu (1)
  ShaoWu Chen (1)
  HaiTao Li (1)
  GuangLiang Dong (1)
  
  1. Beijing Institute of Tracking and Telecommunications Technology, Beijing, 100094, China
  
• 刊物类别：Engineering
• 刊物主题：Chinese Library of Science
  Engineering, general
  
• 出版者：Science China Press, co-published with Springer
• ISSN：1869-1900

文摘

As the scientific data volume in deep-space exploration rapidly grows, spacecraft heavily relies on high data-rate signals that span several megahertz to transmit data back to Earth. Employing high data-rate signals for high-accuracy radiometric interferometry can simultaneously deal with data transmission and spacecraft navigation. We demonstrate very long baseline interferometry (VLBI) tracking of the Chang’E-3 lander and rover to determine their relative lunar-surface position using downlink high data-rate signals. A new method based on the VLBI phase-referencing technique is proposed to obtain the differential phase delay, which is much more accurate than the differential group delay acquired by conventional VLBI approaches. The systemic errors among different signal channels have been well calibrated using the new method. The data from the Chang’E-3 mission were then processed, and meter-level accuracy positions of the rover with respect to the lander have been obtained. This demonstration shows the feasibility of high-accuracy radiometric interferometry using high data-rate signals. The method proposed in this paper can also be applied to future deep-space navigation.