Satellite Ephemeris Approximation Methods to Support Lunar Positioning, Navigation, and Timing Services

Cortinovis, Marta; Iiyama, Keidai; Gao, Grace

doi:10.33012/2023.19282

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2024

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Cited by 2 publications

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“…We assess the mean performance over 24 Monte-Carlo simulations with different clock motions and state estimate initializations. However, in this work, we do not consider other sources of SISE, such as orbit and clock fitting errors in broadcasted ephemeris parameters (Cortinovis & Iiyama, 2023) or uncalibrated or unknown group delays. Therefore, the position SISE and velocity SISE will be larger than the PCBE and VCDE values, respectively.…”

Section: Methodsmentioning

confidence: 99%

Precise Positioning and Timekeeping in a Lunar Orbit via Terrestrial GPS Time-Differenced Carrier-Phase Measurements

Iiyama,

Bhamidipati,,

Gao

2024

navi

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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

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Section: Methodsmentioning

confidence: 99%