Real-time relative positioning of Chang'e-5 satellite in rendezvous and docking with the same-beam VLBI differential observations

doi:10.11947/j.AGCS.2023.20210351

Abstract

Abstract: Chang'e-5 is the most complicated mission of Chinese lunar project. Many separations of several detectors and unmanned rendezvous and docking in lunar orbit are accomplished. During the course of separating and approaching of two detectors, the same-beam very long baseline interferometry (VLBI) observations are carried on. We firstly present the real-time positioning for multi-detectors and differential positioning of CE-5 ascender and combination of orbiter-returner, which is the more direct and quick method to charge the orbit status. The CE-5 mission first achieved the orbital maneuver of CE-5 orbiter-returner combination from the lunar gravity back to the Earth at the distance of lunar orbit. We use the method of instantaneous states reduction to monitor the twice orbital transfer from the lunar to the Earth in real time, and precisely present the status of orbital maneuver, which provides the important reference for the positioning and orbit determination in the future deep-space exploration.

Key words: VLBI, positioning reduction, instantaneous states vector reduction, Chang'e-5, orbital maneuver

CLC Number:

P228

GUO Li, HUANG Yidan, LI Jinling, WANG Guangli, WANG Wenbin, ZHENG Weinmin. Real-time relative positioning of Chang'e-5 satellite in rendezvous and docking with the same-beam VLBI differential observations[J]. Acta Geodaetica et Cartographica Sinica, 2023, 52(3): 375-382.

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