Affiliation:
1. Department of Aerospace Science and Technology, Space Engineering University, Beijing 101416, China
2. School of Aeronautics and Astronautics, Sun Yat-sen University, Shenzhen 518033, China
Abstract
The deployment of megaconstellations in low Earth orbit (LEO) poses significant collision risks with space debris. This paper focuses on analyzing the short-term and long-term collision probabilities of megaconstellations to assess their collision risk. Firstly, a short-term collision risk evolution model is developed to accurately address rendezvous collisions. Secondly, a long-term collision risk evolution model is established by considering space object density, space debris attenuation, space target disintegration, and the distribution of disintegration targets. Through simulations conducted on the Starlink Phase I constellation, the results demonstrate a 30–40% increase in short-term collision probability within the constellation shell, a 70.2% probability of at least one collision during the constellation’s lifetime, and a 25.3% increase in secondary collisions following a collision event. This study provides a reference and application for analyzing the orbital safety of LEO megaconstellations and for promoting the sustainable development and utilization of space resources.
Reference35 articles.
1. Orbital satellite constellations and the growing threat of Kessler syndrome in the lower Earth orbit;Bernat;Inżynieria Bezpieczeństwa Obiektów Antropog.,2020
2. (2024, March 21). ESA Space Debris Office, Space Debris. Available online: https://www.esa.int/Space_Safety/Space_Debris/Space_debris_by_the_numbers.
3. Lifson, M., Arnas, D., Avendaño, M., and Linares, R. (2023, January 23–27). A Method for Generating Closely Packed Orbital Shells and the Implication on Orbital Capacity. Proceedings of the AIAA SCITECH Forum, National Harbor, MD, USA.
4. Chen, Q., Yang, L., Zhao, Y., Wang, Y., Zhou, H., and Chen, X. (2024). Shortest Path in LEO Satellite Constellation Networks: An Explicit Analytic Approach. IEEE J. Sel. Areas Commun., 1–13.
5. Advances and prospects of the configuration design and control research of the LEO mega-constellations;Ruan;Sci. China Technol. Sci.,2022