다중 GNSS 위성군 측정치를 활용한 EKF 기반 달 위성 궤도 결정 시뮬레이션
EKF-Based Orbit Determination Simulation for a Lunar Satellite Using Multi-GNSS Observables
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The Moon is increasingly recognized as a strategic waypoint for future Mars and deep space missions and this is driving demand for reliable Position, Navigation, and Timing (PNT) services. Traditional reliance on the Deep Space Network (DSN) provides high post-processed accuracy but limited real-time performance and may not scale with rising mission numbers. To address this, space agencies are exploring Global Navigation Satellite System (GNSS)-based and dedicated lunar navigation systems. Recent demonstrations, such as the Lunar GNSS Receiver Experiment (LuGRE) mission, have validated GNSS positioning at the Moon with kilometer-level accuracy. This study extends these efforts by simulating lunar orbit determination using multi-GNSS constellations. An Extended Kalman Filter (EKF) approach, integrating GNSS observations with orbital dynamics, is employed. The simulation results show significantly improved position accuracy and underscore EKF’s potential for future lunar navigation systems.
Abstract
The Moon is increasingly recognized as a strategic waypoint for future Mars and deep space missions and this is driving demand for reliable Position, Navigation, and Timing (PNT) services. Traditional reliance on the Deep Space Network (DSN) provides high post-processed accuracy but limited real-time performance and may not scale with rising mission numbers. To address this, space agencies are exploring Global Navigation Satellite System (GNSS)-based and dedicated lunar navigation systems. Recent demonstrations, such as the Lunar GNSS Receiver Experiment (LuGRE) mission, have validated GNSS positioning at the Moon with kilometer-level accuracy. This study extends these efforts by simulating lunar orbit determination using multi-GNSS constellations. An Extended Kalman Filter (EKF) approach, integrating GNSS observations with orbital dynamics, is employed. The simulation results show significantly improved position accuracy and underscore EKF’s potential for future lunar navigation systems.