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Harazim, Mateusz (author)The issue of space debris in Low Earth Orbit is a growing concern that requires comprehensive solutions. This includes preventing further pollution, removing existing debris, and designing resilient spacecraft that can withstand impacts. This thesis focuses on the improvement of spacecraft shielding structures to provide effective protection...master thesis 2023
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Ronckers, Dennis (author)In the area of Bunde in the south of Limburg, the Netherlands, the Geul river flows beneath the Juliana Canal through an inverted siphon before reaching the Meuse. During July 2021 a large scale flood event occurred, showing an insufficient capacity of the inverted siphon when both the Geul and Meuse had high water levels.<br/><br/>Such...student report 2023
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Kaitna, Roland (author), Prenner, David (author), Switanek, Matt (author), Maraun, Douglas (author), Stoffel, Markus (author), Hrachowitz, M. (author)Debris-flow activity is strongly controlled by hydro-meteorological trigger conditions, which are expected to change in a future climate. In this study we connect a regional hydro-meteorological susceptibility model for debris flows with climate projections until 2100 to assess changes of the frequency of critical trigger conditions for...journal article 2023
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de Veld, Frank (author)Thousands of space debris objects remain in space after decades of spaceflight without sustainability regulations. Some of these objects de-orbit naturally, but not objects in the geostationary region for which active debris removal is needed. This thesis presents the case of geostationary debris removal using solar sailing, a propulsion method...master thesis 2022
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Pasqualetto Cassinis, L. (author)Activities in outer space have entered a new era of growth, fostering human development and improving key Earth-based applications such as remote sensing, navigation, and telecommunication. The recent creation of SpaceX's Starlink constellation as well as the steep increase in CubeSat launches are expected to revolutionize the way we use space...doctoral thesis 2022
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Conings, Vincent (author)To ensure long-term sustainable access to space, it is of paramount importance that humankind acts to alleviate the space debris problem in near vicinity of Earth. The most effective mitigation strategy for large debris items is provided by active debris removal missions, which remove one or more resident space objects from orbit. The execution...master thesis 2022
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Cattani, Benedetta (author)More than one million artificial objects greater than 1 cm are already orbiting around the Earth and this number is expected to grow. In the next three years more satellites will be launched than in the past six decades and the rate of space collisions and explosions is also expected to increase, up until an unstoppable series of collisions,...master thesis 2022
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Luggeri, Gianmarco (author)There is a need for environmental sustainability also beyond the atmosphere: Human activities are causing a tragedy of the commons in outer space, and most of the world population does not know anything about it. Outer space has become a non-cooperative game for a few players with infinite resources, in an environment with limited resources. The...master thesis 2022
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Ryan, Conor (author)Spacecraft are under constant threat from hypervelocity impacts by micrometeoroids and space debris. Due to their large surface area and hence increased probability of being impacted by debris, solar arrays are of particular concern. For larger, trackable debris objects, collision avoidance manoeuvres can be performed so as the minimise the...master thesis 2022
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Leon Dasi, Mireia (author)The number of space objects has largely increased in the recent years, becoming a considerable threat to the present and future of satellite operations and human spaceflight. This introduces a need to accurately compute the risk of collision between satellites and space debris. Current methodologies are limited by the type of encounter and the...master thesis 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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Rijlaarsdam, David (author)To mitigate the growth of space debris, it is vital that Active Debris Removal (ADR) is performed in the near future. Since ADR will require robust relative navigation, future spacecraft should be marked with fiducial markers that are robustly extracted from an image taken by a chaser spacecraft. To prevent the restriction of robotic movement...master thesis 2021
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Schild, Maarten (author)Due to ever increasing accessibility, recent years have seen a fast growing number of launches to space, especially to Sun-synchronous orbit. The spent rocket parts, payload fairings and eventually non-functioning payloads of these launches remain in orbit. It is well-established that this accumulation of space debris over time is quickly making...master thesis 2021
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Molera Calvés, G. (author), Pogrebenko, S. V. (author), Wagner, J. F. (author), Cimò, G. (author), Gurvits, L. (author), Bocanegra-Bahamón, T. M. (author), Duev, D. A. (author), Nunes, N. V. (author)We present a software package for single-dish data processing of spacecraft signals observed with VLBI-equipped radio telescopes. The Spacecraft Doppler tracking (SDtracker) software allows one to obtain topocentric frequency detections with a sub-Hz precision and reconstructed and residual phases of the carrier signal of any spacecraft or...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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Alforja Ruiz, Iñigo (author)Space debris is becoming one of the major risks to be suffered by operating and future space missions. Recent studies show that the number of potentially hazardous uncontrolled orbital bodies is growing with time, increasing the probability of impact with operational satellites. To counteract this problem, several studies are being suggested to...master thesis 2020
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Pieters, Liam (author)Space debris objects with sizes between 1 and 10 cm form the greatest risks for creating new collisions with active spacecraft as they are too small to track and too large to be shielded against. This research has simulated the performance of a space-based laser system on the removal of these small-scale debris objects. The selected system is...master thesis 2020
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Barad, Kuldeep (author)Autonomous vision-based navigation is a crucial element for space applications involving a potentially uncooperative target, such as proximity operations for on-orbit servicing or active debris removal. Due to low mass and power characteristics, monocular vision sensors are an attractive choice for onboard vision-based navigation systems. This...master thesis 2020
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Aggarwal, Kapish (author)Mars is expected to become a focal point of exploration (human and robotic) in the near future. Extensive operations and continued human presence on the planet would require a robust space infrastructure. Be it navigation satellite constellations or scientific missions in low Mars orbits (LMO) and Areosynchronous orbits (ASO), every satellite...master thesis 2020
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Lopez Jimenez, Sergi (author)The future space environment is predicted to grow in number of both operational and inactive man-made objects and the era of constellations is expected to arrive during the following years, with many telecom companies launching constellations of up to 12000 satellites. This situation will inevitably lead to over-population of the most demanded...master thesis 2020