Spacecraft Rendezvous Techniques for Multi-Body Gravitational Environments

A detailed investigation into spacecraft relative motion in multi-body gravitational environments is proposed with the underlying goal of defining an efficient and robust framework for spacecraft rendezvous, proximity operations, and docking (RPOD) in cislunar space. Much of the focus of the proposed investigation will be on operations near the 9:2 synodic Near-Rectilinear Halo Orbit, as this work will directly inform trajectory design requirements for the Artemis program, which is of highest immediate importance to crewed spaceflight. However, the RPOD framework will be general enough for application to a wide range of mission scenarios to support the emerging cislunar space infrastructure. The study will incorporate analysis of periodic orbits with varying stability properties, as well as quasi-periodic orbits and non- periodic trajectories in cislunar space to ensure generality. The work will be rooted in dynamical systems theory to leverage the natural behavior of the regime, minimizing the propellant requirements of visiting spacecraft as a result. Operational constraints will be examined for their effect on approach corridors and speed requirements of incoming spacecraft. This is particularly relevant to the Lunar Gateway and the analysis will heavily rely on pre-existing RPOD considerations laid out in the International Rendezvous System Interoperability Standards.

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