Abstract
The safe flight of both backup spacecraft and primary spacecraft without changing the facilities onboard is discussed based on the design and operation of Chang’E-4. Since the TT&C subsystem of Chang’E-4 is the backup spacecraft of Chang’E-3, the two satellites are designed and produced at the same time with the same hardware and software, and they fly at the same time around the similar place. By using the different tele command data rate, the different frequency, the shelter from the moon as well as the limit of the uplink power, the interference between the two tele command link is avoided, and the safety of the two satellites are maintained.
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References
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Li, X., Shen, X., Yang, M., Liu, S. (2020). The Analysis and Practice of Backup Spacecraft Tele Command Based on Chang’E-4. In: Liang, Q., Wang, W., Liu, X., Na, Z., Jia, M., Zhang, B. (eds) Communications, Signal Processing, and Systems. CSPS 2019. Lecture Notes in Electrical Engineering, vol 571. Springer, Singapore. https://doi.org/10.1007/978-981-13-9409-6_193
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DOI: https://doi.org/10.1007/978-981-13-9409-6_193
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