Assessing and Minimizing Collisions in Satellite MegaConstellations
Abstract
We aim to provide satellite operators and researchers with an efficient means for evaluating and mitigating collision risk during the design process of megaconstellations. We first establish a baseline for evaluating various techniques for closeencounter prediction and collisionprobability calculation (Hoots et al. 1984, Gronchi 2005, JeongAhn and Malhotra 2015) by carrying out bruteforce numerical simulations and using a sequence of filters to greatly reduce the computational expense of the algorithm. Next, we estimate conjunction events in the orbital environment following the anticipated deployments of the OneWeb LEO and SpaceX Starlink megaconstellations. As a final step, we investigate Minimum Space Occupancy (MiSO) orbits (Bombardelli et al. 2018), a generalization of the wellknown frozen orbits that account for the perturbedKeplerian dynamics of the EarthMoonSunsatellite system. We evaluate the ability of MiSO configurations of the proposed megaconstellations, as suggested by Bombardelli et al. 2018, to reduce the risk of endogenous (intraconstellation) collisions. The results indicate that the adoption of the MiSO orbital configuration can significantly reduce risk with nearly indistinguishable adjustments to the nominal orbital elements of the constellation satellites.
 Publication:

arXiv eprints
 Pub Date:
 February 2020
 arXiv:
 arXiv:2002.00430
 Bibcode:
 2020arXiv200200430R
 Keywords:

 Astrophysics  Earth and Planetary Astrophysics;
 Mathematics  Dynamical Systems
 EPrint:
 32 pages, 19 figures