After more than 50 years since the Apollo program, there is a growing interest in establishing a sustainable human presence on the Moon. To support increasing plans for lunar exploration, various missions are being planned in different lunar orbit regimes, e.g., the European Space Agency's lunar Pathfinder (Giordano et al., 2022), which is to be deployed in an elliptical lunar frozen orbit (ELFO), and the Lunar Gateway (Winternitz et al., 2019), which is being spearheaded by the National Aeronautics and Space Administration (NASA), in a near-rectilinear halo orbit (NRHO). These missions require precise positioning and onboard timing to