ROSSONERO: NEW FEATURES IN THE SIMULATION TOOL FOR REALISTIC RENDEZVOUS MISSION DESIGN IN THE RESTRICTED THREE-BODY PROBLEM

ROSSONERO (Rendezvous Operations Simulation Software on Near Rectilinear Orbit) is a simulation tool for design of phasing and rendezvous maneuvers between an active chaser spacecraft and a passive target spacecraft in highly non-Keplerian orbits in which the third body perturbation can not be neglected. It is developed with particular focus for rendezvous and proximity operations in the Earth-Moon L2 Near Rectilinear Halo Orbit (NRHO) of the upcoming Lunar Orbital Platform Gateway(LOP-G). However, the tool is structured so that it can handle different orbit types, different spacecraft architectures and different three-body problem scenarios. The software simulates the full 6-DOF relative dynamics and control. Sensors and actuators models, and control allocation methods are included in the simulation tool, to assess realistic performances of the guidance and control loops. The tool also allows to perform passive safety analysis of the renndezvous sequence, in terms of different types of failure, such as missed and partially performed firings, and random unintended firings. ROSSONERO is an effective and user-friendly simulation tool for development and validation of rendezvous guidance and control under the restricted three-body problem dynamics.