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van Helden, G. (author), Zandbergen, B.T.C. (author), Shvarts, A. Y. (author), Specht, M.M. (author), Gill, E.K.A. (author)Higher educational institutions have broadly adopted Collaborative Engineering Design (CED) activities to prepare students for complex problem-solving in multidisciplinary settings. These activities are non-linear and mediated by various social practices and tools. Therefore educators might struggle in facilitating the achievement of specific...conference paper 2023
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Turan, E. (author), Speretta, S. (author), Gill, E.K.A. (author)In recent years, there has been a growing interest in lunar missions, particularly with the growing role of small satellites facilitated by piggyback launch opportunities. Typically, ground-based radiometric tracking is the workhorse to establish the necessary navigation solution in these missions, however, this could be expensive, while small...conference paper 2023
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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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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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Broekhuizen, C.H. (author), Speretta, S. (author), Uludag, M.S. (author), van den Bos, M.F. (author), Haenen, J. (author), Menicucci, A. (author), Gill, E.K.A. (author)In this paper, a detailed design is presented of a communications module that is designed to fit tight PocketQube design budgets but still offer performance at least comparable to commercial off-the-shelf CubeSat solutions. The communications module features extremely efficient power usage, less than 2 Watt DC for 1 Watt RF output while fitting...conference paper 2020
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Pasqualetto Cassinis, L. (author), Fonod, R. (author), Gill, E.K.A. (author), Ahrns, Ingo (author), Gil Fernandez, Jesus (author)This paper introduces a novel framework which combines a Convolutional Neural Network (CNN) for feature detection with a Covariant Efficient Procrustes Perspective-n-Points (CEPPnP) solver and an Extended Kalman Filter (EKF) to enable robust monocular pose estimation for close-proximity operations around an uncooperative spacecraft. The relative...conference paper 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
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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 proposes a possible solution which is the design of a novel integrated solar thermal system that co-generates propulsion and power on-board mini satellites. The system consists of a solar thermal propulsion system ...conference paper 2020
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Mok, S. (author), Guo, J. (author), Gill, E.K.A. (author), Rajan, R.T. (author)Employing a satellite swarm for radio astronomy has been continuously addressed in the Orbiting Low Frequency ARray (OLFAR) project. A 100 km diameter of aperture array constructed by distributed satellites will be able to provide sky maps of better than 1 arc-minute spatial resolution at 10 MHz. However, an orbit design strategy for the...conference paper 2020
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Pasqualetto Cassinis, L. (author), Fonod, R. (author), Gill, E.K.A. (author), Ahrns, Ingo (author), Gil Fernandez, Jesus (author)This paper reports on a comparative assessment of Image Processing (IP) tech- niques for the relative pose estimation of uncooperative spacecraft with a monocular camera. Currently, keypoints-based algorithms suffer from partial occlusion of the target, as well as from the different illumination conditions be- tween the required offline database...conference paper 2019
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Speretta, S. (author), Uludag, M.S. (author), Karunanithi, Visweswaran (author), Radu, S. (author), Chronas Foteinakis, N. (author), Bouwmeester, J. (author), Menicucci, A. (author), Gill, E.K.A. (author)This paper presents the design of a multi-frequency deployable antenna system for femto-satellites as part of the Delfi-PQ project, a PocketQube with a size of 50x50x178 mm which is being developed by the Delft University of Technology. This new form factor brings its own challenges on every subsystem and it is seen as a stepping stone towards...conference paper 2019
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Uludag, M.S. (author), Pallichadath, V. (author), Speretta, S. (author), Radu, S. (author), Chronas Foteinakis, N. (author), Melaika, Antanas (author), Cervone, A. (author), Gill, E.K.A. (author)This papers gives an insight on different sub topics related to a micro-propulsion subsystem for a PocketQube. First, PocketQubes will be introduced and then Delfi-PQ will be presented, providing an overview of the mission for which this micro-propulsion system will be used. Step by step, the paper will explain the subsystem, its challenges,...conference paper 2019
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Uludag, M.S. (author), Yakut, Erdinc (author), Speretta, S. (author), Radu, S. (author), Chronas Foteinakis, N. (author), Bouwmeester, J. (author), Menicucci, A. (author), Gill, E.K.A. (author)PocketQubes represent a new type of cube-shaped platforms with dimensions of 50x50 mm and mass of 250 g. Just like the CubeSats, these platforms are also split in units which are referred to as 1P. The Delft University of Technology has been working on Delfi-PQ, a 3P PocketQube with the dimensions of 50x50x178 mm. This miniaturized size brings...conference paper 2019
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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 their 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 change from the...conference paper 2019
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Bouwmeester, J. (author), Radu, S. (author), Uludag, M.S. (author), Chronas Foteinakis, N. (author), Speretta, S. (author), Menicucci, A. (author), Gill, E.K.A. (author)PocketQubes are a new form factor of highly miniaturized satellites with a body of one or more cubic units of 5 cm. The characteristics of PocketQubes in terms or legal and regulatory aspects, the technological readiness levels and financial considerations are assessed. In particular, an analysis of orbital decay characteristics has been carried...conference paper 2018
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Cordeiro Guerrieri, D. (author), de Athayde Costa e Silva, M. (author), Cervone, A. (author), Gill, E.K.A. (author)A Low-Pressure Micro-Resistojet (LPM) is under development at TU Delft with the intention to provide future nano- and pico-satellites with the necessary capability to execute formation flying maneuvers, orbit change maneuvers, and station keeping. In this particular type of electro-thermal thruster, water is a green propellant of excellent...conference paper 2018
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de Athayde Costa e Silva, M. (author), Cordeiro Guerrieri, D. (author), Cervone, A. (author), Gill, E.K.A. (author)Vaporizing Liquid Microthrusters (VLM) have recently received attention as promising propulsion technology for highly miniaturized spacecraft due to its high thrust levels and low power consumption. This paper presents the results of numerical optimization of the parameters for the design of the heating chamber of VLMs that use water as the...conference paper 2018
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Radu, S. (author), Uludag, M.S. (author), Speretta, S. (author), Bouwmeester, J. (author), Gill, E.K.A. (author), Chronas Foteinakis, N. (author)Delft University of Technology has embarked on PocketQubes to showcase as the next class of miniaturized satellites. In the past decade, CubeSats have grown towards a successful business with mature capabilities. PocketQubes, however, are still in their infancy. The small size of the PocketQubes will trigger innovations in miniaturization and...conference paper 2018
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Fonod, R. (author), Gill, E.K.A. (author)The problem of pure magnetic detumbling of a fast-tumbling picosatellite is considered. A new weighted B-dot control algorithm is proposed. The algorithm enables power reduction while not sacrificing detumbling performance. Analytical expressions relating the maximal expected rotational rate to the minimum sampling time required are presented....conference paper 2018