Stationkeeping and Orbit Control for Spacecraft in NRHO

This technical report examines stationkeeping, orbit determination, and attitude control for spacecraft operating in Near Rectilinear Halo Orbits (NRHO), specifically in the context of NASA's Gateway project near the Moon. The report outlines the planned use of NRHO as a staging ground for human missions beyond Earth, detailing the orbit's characteristics and the necessity for orbit maintenance maneuvers to ensure long-term operations. It discusses the implications of orbit determination challenges and the role of the Deep Space Network in tracking both crewed and uncrewed operations. The report also presents simulations of the Gateway's attitude control systems, which must address various torques and maintain a stable attitude during different operational scenarios. The analysis includes the evaluation of propulsion systems and the operational differences between crewed and uncrewed configurations, emphasizing the cost implications of stationkeeping in each case. Overall, the report provides a comprehensive examination of the technical requirements and considerations for maintaining spacecraft in NRHO.