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Turan, E. (author), Speretta, S. (author), Gill, E.K.A. (author)In this study, the application of the Linked Autonomous Interplanetary Satellite Orbit Navigation (LiAISON) method for cislunar satellite formations is investigated considering range only and range-rate only measurements. The LiAISON method provides an autonomous orbit determination solution solely using satellite-to-satellite measurements such...other 2022
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Bouwmeester, J. (author), Menicucci, A. (author), Gill, E.K.A. (author)The objective of this paper is to investigate which approach would lead to more reliable CubeSats: full subsystem redundancy or improved testing. Based on data from surveys, the reliability of satellites and subsystems is estimated using a Kaplan–Meier estimator. Subsequently, a variety of reliability models is defined and their maximum...journal article 2022
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Villalba, Víctor (author), van Es, Johannes (author), Kuiper, J.M. (author), Gill, E.K.A. (author)Piezoelectric actuators are a very attractive technology for active optics mechanisms in space applications due to their very high precision and reliability. However, self-heating of these actuators may be limit their use in space or under high loads, due to the limited ability to evacuate heat. Test procedures that reproduce the operational...journal article 2022
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Turan, E. (author), Speretta, S. (author), Gill, E.K.A. (author)In recent years, there is a growing interest in small satellites for deep space exploration. The current approach for planetary navigation is based on ground-based radiometric tracking. A new era of low-cost small satellites for space exploration will require autonomous deep space navigation. This will decrease the reliance on ground-based...review 2022
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Turan, E. (author), Speretta, S. (author), Gill, E.K.A. (author)This study presents an autonomous orbit determination system based on crosslink radiometric measurements applied to a future lunar CubeSat mission to clearly highlight its advantages with respect to existing ground-based navigation strategies. This work is based on the Linked Autonomous Interplanetary Satellite Orbit Navigation (LiAISON) method...journal article 2022
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Turan, E. (author), Speretta, S. (author), Gill, E.K.A. (author)This study provides a performance analysis of radiometric autonomous navigation for the lunar satellite network topologies formed by three spacecraft at various orbits. This work is built on the Linked Autonomous Interplanetary Satellite Orbit Navigation (LiAISON) method and uses mesh (distributed) and centralized (star) network topologies. The...other 2022
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Turan, E. (author), Speretta, S. (author), Gill, E.K.A. (author)This study investigates the application of the Linked Autonomous Interplanetary Satellite Orbit Navigation (LiAI-SON) technique for multiple small spacecraft in cislunar orbits considering high inter-satellite range measurement errors. The LiAISON method provides an autonomous orbit determination solution using crosslink measurements such as...conference paper 2022
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van Helden, G. (author), Zandbergen, B.T.C. (author), Specht, M.M. (author), Gill, E.K.A. (author)To adequately prepare engineering students for their professional career, educational institutions offer projects in which students collaboratively solve engineering design problems. It is known from research these projects can lead to a variety of learning outcomes and student experiences. However, studies that provide insights in the influence...conference paper 2022
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Gradl, P.R. (author), Cervone, A. (author), Gill, E.K.A. (author)Additive Manufacturing (AM) offers new design and manufacturing opportunities of thin-wall microchannel heat exchangers for aerospace and industrial applications. Laser Powder Directed Energy Deposition (LP-DED) is an AM process providing large scale manufacturing of thin-wall microchannel heat exchangers. Successful industrialization of the LP...journal article 2022
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Pasqualetto Cassinis, L. (author), Menicucci, A. (author), Gill, E.K.A. (author), Ahrns, Ingo (author), Sanchez-Gestido, Manuel (author)The estimation of the relative pose of an inactive spacecraft by an active servicer spacecraft is a critical task for close-proximity operations, such as In-Orbit Servicing and Active Debris Removal. Among all the challenges, the lack of available space images of the inactive satellite makes the on-ground validation of current monocular...journal article 2022
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Di Mascio, S. (author), Menicucci, A. (author), Gill, E.K.A. (author), Furano, Gianluca (author), Monteleone, Claudio (author)The use of deep neural networks (DNNs) in terrestrial applications went from niche to widespread in a few years, thanks to relatively inexpensive hardware for both training and inference, and large datasets available. The applicability of this paradigm to space systems, where both large datasets and inexpensive hardware are not readily...journal article 2021
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Saathof, R. (author), Speretta, S. (author), Guo, J. (author), Kuiper, J.M. (author), Gill, E.K.A. (author)Laser satellite communications provides an attractive application for optical communications. It provides more bandwidth with improved security at potentially a lower cost due to reduced size weight and power (SWAP) and reduced license cost compared to radio frequencies (RF) communications. These advantages have been recognized for years and...abstract 2021
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Casini, S. (author), Fodde, Iosto (author), Monna, Bert (author), Cervone, A. (author), Gill, E.K.A. (author)The purpose of this work is to present a novel CubeSat architecture, aimed to explore Near Earth Asteroids. The fast growth in small satellite commercial-off-the-shelf technologies, which characterized the last decade of space industry, is exploited to design a 3U CubeSat able to provide a basic scientific return sufficient to improve the...journal article 2021
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Di Mascio, S. (author), Menicucci, A. (author), Gill, E.K.A. (author), Furano, Gianluca (author), Monteleone, Claudio (author)This paper discusses principles and techniques to evaluate processors for dependable computing in space applications. The focus is on soft errors, which dominate the failure rate of processors in space. Error, failure and propagation models from literature are selected and employed to estimate the failure rate due to soft errors in typical...review 2021
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Leverone, F.K. (author), Cervone, A. (author), Pini, M. (author), Gill, E.K.A. (author)Small satellites with increased capabilities in terms of power and propulsion are being demanded for future missions. This paper addresses an alternative bi-modal solution which consists of a solar thermal propulsion system coupled with a micro-Organic Rankine Cycle system, to co-generate thrust and electrical power. Current literature on bi...journal article 2021
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Pasqualetto Cassinis, L. (author), Fonod, R. (author), Gill, E.K.A. (author), Ahrns, Ingo (author), Gil-Fernández, Jesús (author)The relative pose estimation of an inactive spacecraft by an active servicer spacecraft is a critical task in the design of current and planned space missions, due to its relevance for close-proximity operations, such as In-Orbit Servicing and Active Debris Removal. This paper introduces a novel framework to enable robust monocular pose...journal article 2021
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Mok, S. (author), Guo, J. (author), Gill, E.K.A. (author), Rajan, R.T. (author)Orbiting Low Frequency Array for Radio Astronomy (OLFAR) is a radio astronomy mission that has been studied since 2010 by several Dutch universities and research institutes. The mission aims at producing sky maps by collecting cosmic signals at ultra-low wavelengths regimes, below the 30 MHz frequency band. A satellite swarm comprising more than...conference paper 2020
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Leverone, F.K. (author), Pini, M. (author), Cervone, A. (author), Gill, E.K.A. (author)Small satellites are receiving increased recognition in the space domain due to their reduced associated launch costs and shorter lead time when compared to larger satellites. However, this advantage is often at the expense of mission capabilities, such as available electrical power and propulsion. A possible solution is to shift from the...journal article 2020
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Bentum, M. J. (author), Verma, M. K. (author), Rajan, R.T. (author), Boonstra, A. J. (author), Verhoeven, C.J.M. (author), Gill, E.K.A. (author), van der Veen, A.J. (author), Falcke, H. (author), Wolt, M. Klein (author), Monna, B. (author), Engelen, S. (author), Rotteveel, J. (author), Gurvits, L. (author)The past two decades have witnessed a renewed interest in low frequency radio astronomy, with a particular focus on frequencies above 30 MHz e.g., LOFAR (LOw Frequency ARray) in the Netherlands and its European extension ILT, the International LOFAR Telescope. However, at frequencies below 30 MHz, Earth-based observations are limited due to a...journal article 2020
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Casini, S. (author), Fodde, I. (author), Engelen, S. (author), Monna, Bert (author), Cervone, A. (author), Gill, E.K.A. (author)The aim of this paper is to assess the feasibility of using currently available commercial-off-the-shelf (COTS) small-satellites components in deep-space scenarios, studying their applicability and performance. To evaluate the performances, an asteroid fly-by mission is briefly introduced, but several of the selection criteria and ideas can be...conference paper 2020