Transfers Orbit Design from Lunar Frozen Orbits to Near Rectilinear Halo Orbits

A multi-maneuver approach to transitioning from a lunar frozen orbit (LFO) to a cislunar L2 near rectilinear halo orbit (NRHO) is expected in this research. LFOs are predicted to be utilized to provide the navigation or communication platform for lunar exploration. They are long-term stable orbits with constant orbital elements on average. Subsets of halo orbit families, known as NRHOs, are orbits that are nearly stable. Due to their important locations in cislunar space, the L2 NRHOs are considered as possible launching platforms for deep space or lunar exploration missions. For upcoming cislunar space exploration missions, the low fuel consumption transfer approach between these orbits is therefore very valuable. Utilizing the maximum stretching direction to determine the insertion maneuver, the spacecraft may rapidly approach NRHOs. In order to optimize the transfers, a nonlinear programming problem is developed. The optimization results with different transfer windows in the high-fidelity model are given for the transfer from LFOs to NRHOs, which demonstrate the reliability of the proposed strategy.