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The deployment of mega constellations has had a significant effect on the compounding space debris environment, increasing the number of on-orbit objects in all conditions and damaging the stability of the space debris environment. The increased density of space objects is associated with an increased risk of on-orbit collisions. Collision risk exists not only between a mega constellation and the space debris environment but also inside a mega constellation. In this study, we used the Starlink constellation to investigate the self-induced collision risk caused by malfunctioning satellites. First, we analyzed the conjunction condition between malfunctioning and operative satellites based on long-term orbital evolution characteristics. The collision probability was then calculated based on the conjunction analysis results. The results show that malfunctioning satellites in Phase 1 cause an 86.2% self-induced collision probability based on a malfunctioning rate of 1%, which is close to the collision probability caused by objects larger than 6 cm during five years of service. Therefore, self-induced collisions are another important risk factor for the Starlink constellation.
Kessler, D. J. Collisional cascading: The limits of population growth in low Earth orbit. Advances in Space Research, 1991, 11(12): 63–66.
Zhang, J., Cai, Y., Xue, C., Xue, Z., Cai, H. LEO mega constellations: Review of development, impact, surveillance, and governance. Space: Science & Technology, 2022, 2022: 9865174.
Yun, C., Hu, M., Song, Q., Wu, T. Security research and maneuver avoidance strategy of LEO constellation. Space Debris Research, 2020, 20(3): 17–23. (in Chinese)
Radtke, J., Kebschull, C., Stoll, E. Interactions of the space debris environment with mega constellations—Using the example of the OneWeb constellation. Acta Astronautica, 2017, 131: 55–68.
Bastida Virgili, B., Dolado, J. C., Lewis, H. G., Radtke, J., Krag, H., Revelin, B., Cazaux, C., Colombo, C., Crowther, R., Metz, M. Risk to space sustainability from large constellations of satellites. Acta Astronautica, 2016, 126: 154–162.
Ren, S., Yang, X., Wang, R., Liu, S., Sun, X. The interaction between the LEO satellite constellation and the space debris environment. Applied Sciences, 2021, 11(20): 9490.
Le May, S., Gehly, S., Carter, B. A., Flegel, S. Space debris collision probability analysis for proposed global broadband constellations. Acta Astronautica, 2018, 151: 445–455.
Hu, S., Chen, L., Liu, L. The structure evolution of satellite constellation. Acta Astronomica Sinica, 2003, 44(1): 46–54. (in Chinese)
Chen, Y., Zhao, L., Liu, H., Li, L., Liu, J. Analysis of configuration and maintenance strategy of LEO walker constellation. Journal of Astronautics, 2019, 40(11): 1296–1303. (in Chinese)
Xiang, J., Fan, L., Zhang, Y. Study on design of the structure self-stabilization for satellite constellation. Flight Dynamics, 2007, 25(4): 81–85. (in Chinese)
Liu, L. Orbital Theory of Spacecraft. Beijing: National Defense Industry Press, 2000: 126–136. (in Chinese)
James, R. W. Mission Geometry: Orbit and Constellation Design and Management. Dordrecht, the Netherlands: Microcosm Press & Kluwer Academic Publishers, 2001.
Chobotov, V. A., Herman, D. E., Johnson, C. G. Collision and debris hazard assessment for a low-Earth-orbit space constellation. Journal of Spacecraft and Rockets, 1997, 34(2): 233–238.
Chen, L., Han, L., Bai, X. Orbital Dynamics and Error Analysis of Space Object. Beijing: National Defense Industry Press, 2011.