Multi-Objective Design of a Lunar GNSS

Pereira, Filipe; Reed, Patrick M.; Selva, Daniel

doi:10.33012/navi.504

Cited by 9 publications

(3 citation statements)

References 39 publications

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“…Several attempts have been made to optimise the solution, using parameters such as satellite observability and sky geometry, minimal station-keeping manoeuvres, and cost-effective insertion from Earth trajectory [24,25]. Most solutions congregate to the ELFO solution proposed by [26].…”

Section: Orbital Designmentioning

confidence: 99%

Autonomous and Earth-Independent Orbit Determination for a Lunar Navigation Satellite System

Critchley-Marrows,

Wu,

Kawabata

et al. 2024

Aerospace

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In recent years, the number of expected missions to the Moon has increased significantly. With limited terrestrial-based infrastructure to support this number of missions, as well as restricted visibility over intended mission areas, there is a need for space navigation system autonomy. Autonomous on-board navigation systems in the lunar environment have been the subject of study by a number of authors. Suggested systems include optical navigation, high-sensitivity Global Navigation Satellite System (GNSS) receivers, and navigation-linked formation flying. This paper studies the interoperable nature and fusion of proposed autonomous navigation systems that are independent of Earth infrastructure, given challenges in distance and visibility. This capability is critically important for safe and resilient mission architectures. The proposed elliptical frozen orbits of lunar navigation satellite systems will be of special interest, investigating the derivation of orbit determination by non-terrestrial sources utilizing celestial observations and inter-satellite links. Potential orbit determination performances around 100 m are demonstrated, highlighting the potential of the approach for future lunar navigation infrastructure.

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Section: Orbital Designmentioning

confidence: 99%

Autonomous and Earth-Independent Orbit Determination for a Lunar Navigation Satellite System

Critchley-Marrows,

Wu,

Kawabata

et al. 2024

Aerospace

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“…A radio array telescope uses the principle of radio interferometry, which relies heavily on the precise timing and positioning of each satellite to make the desired observations. There exist proposals for Lunar global navigation satellite systems (GNSS) that could aid in the positioning and synchronization of the swarm (Pereira et al, 2022). However, these projects are still young and can benefit from the same methods proposed for time scale generation.…”

Section: Introductionmentioning

confidence: 99%

A Robust Time Scale Based on Maximum Likelihood Estimation

McPhee¹,

Tourneret²,

Valat³

et al. 2023

Proceedings of the 54th Annual Precise Time and Time Interval Systems and Applications Meeting

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He is currently undertaking a PhD in developing an autonomous timescale for a swarm of nanosatellites. His current research tasks are cofinanced by the French space agency CNES and the TéSA laboratory.Jean-Yves Tourneret (SM'08, F'19) received the ingénieur degree in electrical engineering from the Ecole Nationale Supérieure d'Electronique, d'Electrotechnique, d'Informatique, d'Hydraulique et des Télécommunications (ENSEEIHT) de Toulouse in 1989 and the Ph.D. degree from the National Polytechnic Institute from Toulouse in 1992. He is currently a professor in the university of Toulouse (ENSEEIHT) and a member of the IRIT laboratory (UMR 5505 of the CNRS). His research activities are centered around statistical signal and image processing with a particular interest to Bayesian and Markov chain Monte Carlo (MCMC) methods. He has been a member of different technical committees including the Signal Processing Theory and Methods (SPTM) committee of the IEEE

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“…Such a solution, however, may not be optimal in terms of cost effectiveness, in particular if an incremental approach is forsaken for the constellation deployment. A more advanced design proposed in two consecutive publications [6,7] considered multi-objective optimisation to provide high navigation performance availability to the lunar global surface, while still also considering other system-level objectives such as costs, station-keeping expenditure, and robustness to failure. Other studies considered instead constellations deployed in Lagrange Point Orbits (LPO), which provide many geometrical and dynamical features that classical two-body orbits do not possess [8,9].…”

Section: Introductionmentioning

confidence: 99%

Exploiting Lunar Navigation Constellation for GNC Enhancement in Landing Missions

Zanotti,

Ceresoli,

Lavagna

2023

Aerospace

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To support the increasing number of planned lunar missions, a collaborative international initiative is underway to conceptualise and establish a lunar satellite constellation for communication and navigation. In this context, the goal of the current paper is to analyse what the obtainable performance is for a lunar lander that executes state estimation employing one-way ranging signals from such a Lunar Navigation Service (LNS). In particular, a small-sized optimised navigation constellation is considered as the main source of measurements, which, coupled with an accelerometer and an altimeter, is used to estimate the lander absolute trajectory during the main braking phase. The guidance is extracted on board by interpolation of a ground-optimised trajectory, followed by a reference-tracking regulator. Two alternative control tuning cases are presented, one targeting high performance, the other targeting low propellant mass. Nominal performance and associated sensitivity analyses assessed the feasibility of supporting such a critical phase with a reduced LNS constellation, reaching final control errors below 500m, with the better performing one going down to 56m. Among the two proposed alternatives, the one targeting low fuel expenditure has proven, however, to also be more robust against time and state uncertainty, providing much larger success rates.

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Multi-Objective Design of a Lunar GNSS

Cited by 9 publications

References 39 publications

Autonomous and Earth-Independent Orbit Determination for a Lunar Navigation Satellite System

Autonomous and Earth-Independent Orbit Determination for a Lunar Navigation Satellite System

A Robust Time Scale Based on Maximum Likelihood Estimation

Exploiting Lunar Navigation Constellation for GNC Enhancement in Landing Missions

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