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Geul, J. (author)The goal of the research is to improve space situational awareness (SSA) for space debris objects, and to make space operations more sustainable and remain possible in the future. Vital to this awareness is understanding which objects are present, through space surveillance and tracking (SST), and where these objects will be in the future,...doctoral thesis 2023
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Riti, Cristina (author)Insertion maneuvers are used to move a spacecraft from an open orbit (parabolic or hyperbolic) into a closed orbit around a target body. These maneuvers are key components in any space mission considering orbiting a body for a large amount of time, for exploration or landing; the hyperbolic orbit will be the one that will be used to transfer...master thesis 2023
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Capus, Luana (author)Space debris has become a rising problem in the aerospace community, leading to the need for effective spacecraft collision avoidance processes. Currently, these processes can be called unilateral as only one object in conjunction is considered maneuverable. This thesis focuses on the implementation of a combined action approach to collision...master thesis 2023
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Cowan, Sean (author)While the space industry expands rapidly and space exploration becomes ever more relevant, this thesis aims to automate the design of Multiple Gravity-Assist (MGA) transfers using low-thrust propulsion. In particular, during the preliminary design phase of space missions, the combinatorial complexity of MGA sequencing is large and current...master thesis 2023
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Paliušis, Kipras (author)Laser communication provides numerous benefits over typical Radio Frequency communication, such as lower power, not occupying regulated frequency bands, possibilities for much higher data rates and resistance to jamming. Combined with satellite constellations, Laser Inter-satellite Links (LISL) can enable global connectivity. However, satellites...master thesis 2023
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Monechi, Guido (author)Solar sailing is a flight-proven low-thrust propulsion technology with strong potential for innovative scientific missions. The heliogyro is promising sailcraft design that utilizes a set of long slender blades which are deployed and flattened by spin-induced tension and whose orientations can be individually controlled. The main advantages of...master thesis 2023
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Fiuk, Aleksander (author)Operating spacecraft in a perturbed environment of a binary asteroid system is a challenging task. In light of the near-future exploration of the 65803 Didymos system by the Hera probe and the lack of study of orbital evolution of naturally-levitated regolith particles in this system, a method is here proposed to identify regions of high risk of...master thesis 2022
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Stahl, Dominik (author)Distant Retrograde Orbits (DROs) are special orbits for third bodies in two-body systems. The third body revolves around the secondary – the smaller of the two primaries – in a retrograde way, meaning the direction is opposite to the direction that the primaries revolve around each other. DROs are not close to either of the primaries, making it...master thesis 2022
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Paricio Ezquerra, Daniel (author)Near-Earth Asteroids (NEAs) have attracted the attention of the scientific community in the last few years. Not only because of their importance to life on Earth but also their scientific potential and possible economic returns. This work explores the use of quasi-periodic orbits to bound the motion of NEAs close to the Earth’s vicinity for...master thesis 2021
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van den Abbeele, Bert (author)An array of BlackGEM telescopes is currently being constructed in Chile. The Royal Netherlands Air Force wants to assess the suitability of the BlackGEM telescopes for initial orbit determination of unknown objects in high orbits around Earth. A set of short arc observations of geostationary satellites of no more than 5 minutes is available from...master thesis 2021
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Gómez Pérez, Pablo (author)In this thesis, a new method to approximate the cost function of Low-Thrust, Multiple-Gravity-Assist interplanetary trajectories using a Machine Learning surrogate is proposed. This method speeds up the optimization process without fine tuning of the surrogate parameters for every individual case. The computational cost of obtaining training...master thesis 2020
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de Boer, Roderick (author)This paper presents time-optimal transfer trajectories between planar solar-sail displaced libration point orbits around the $L_1$ and $L_2$ points of the Sun-Earth and Earth-Moon systems. Initial guesses for these transfers are generated as two-segment trajectories, with a fixed sail attitude along each segment. The position and velocity...master thesis 2020
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Ramirez Torralba, Olga (author)Recognising the threat of near-Earth objects (NEOs), many ground-based surveys have been deployed worldwide. However, ~20% of these potential impactors are estimated to be approaching us from the day-side, and are thus very difficult to detect using ground surveys. Over the last decade, several space-based capabilities have emerged in an effort...master thesis 2020
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Vandenberghe, Alexander (author)In this thesis, the performance of three different station-keeping methods applied to Sun-Earth L2 halo orbits is investigated. In order to evaluate these methods, first a framework for accurate satellite dynamics was developed. This was done by starting off at the Circular Restricted Three Body Problem, and extending that to a more accurate...master thesis 2020
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Carvalho Barreira Lages Ribeiro, André (author)Orbital plane changes require a considerable amount of propellant to be completed if the traditional fully propulsive maneuver is used. The cost associated with this type of maneuvers is one of its major drawbacks, and performing an inclination change in orbit would require a large part of the total mass budget of the mission. Moreover,...master thesis 2019
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Acciarini, Giacomo Acciarini (author)In the context of metaheuristic global optimization, we present the definition and development of two new ant colony optimizers (ACO): a single-objective mixed-integer one, called ACOmi, and a multi-objective hypervolume-based one, called MHACO. In particular, after having performed a verification and validation phase over a wide set of problems...master thesis 2019
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Gutierrez Ahumada, Jose Angel (author)Ballistic capture is a relatively novel concept in interplanetary mission design with the potential to make Mars and other targets in the Solar System more accessible. A complete end-to-end interplanetary mission from an Earth-bound orbit to a stable science orbit around Mars (in this case, an areostationary orbit) has been conducted using this...master thesis 2019
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Villegas Pinto, Daniel (author)In the framework of JAXA’s Hayabusa2 mission, we study the dynamical environment around asteroid Ryugu to investigate whether ejecta particles can be temporarily trapped in periodic orbits following the Small Carry-on Impactor (SCI) operation. If these particles remain about the asteroid, they could potentially jeopardize the mission as, in the...master thesis 2019
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Geda, Márton (author)Space mission complexity is constantly increasing, therefore there is a growing demand for highly accurate and fast trajectory design and simulation tools. Some astrodynamics applications, such as planetary protection simulations, require millions of total simulated years to quantify certain probabilities with a high confidence level. It is...master thesis 2019
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de Jong, Hanneke (author)An analytical low-thrust design tool for orbits around Earth has been developed which takes perturbations into account. The Simplified General Perturbations 4 model (SGP4) is combined with Edelbaum’s analytical low-thrust trajectory model. This resulted in the SGP4-LT tool which required an iterative version of SGP4. To obtain this iterative...master thesis 2018
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