Comparison of the response of different configurations of aircraft repair patches under static and dynamic loading 

    Pitta, Siddharth (Date of defense: 2020-07-10)

    In the modern era of transportation, air travel has gained a huge pace and still kept increasing. The global demand for air transport is increasing at a rate of 6%, because of population growth and ticket price reductions. ...

    Contributions to GNSS-R earth remote sensing from nano-satellites 

    Carreno-Luengo, Hugo (Date of defense: 2016-01-21)

    Global Navigation Satellite Systems Reflectometry (GNSS-R) is a multi-static radar using navigation signals as signals of opportunity. It provides wide-swath and improved spatio-temporal sampling over current space-borne ...

    Contributions to multi-purpose GNSS positioning to support multi-frequency and multi-constellation with high accuracy and integrity 

    Ibáñez Segura, Deimos (Date of defense: 2023-10-23)

    (English) Global Navigation Satellite System (GNSS) have revolutionized location and timing technologies due to their low cost and wide availability. Initially, GNSS was limited to the american Global Positioning System ...

    Cost-based linear holding practice and collaborative air traffic flow management under trajectory based operations 

    Xu, Yan (Date of defense: 2018-11-20)

    The current air transportation system is reaching the capacity limit in many countries/regions across the world. It tends to be less efficient or even incapable sometimes to deal with the enormous air traffic demand that ...

    Counter a drone via deep reinforcement learning 

    Çetin, Ender (Date of defense: 2023-08-30)

    (English) Unmanned aerial vehicles (UAV) also known as drones have been used for a variety of reasons such as surveillance, reconnaissance, shipping and delivery, etc. and commercial drone market growth is expected to reach ...

    Deep learning techniques for demand-capacity balancing 

    Mas Pujol, Sergi (Date of defense: 2023-05-12)

    (English) Nowadays Air Navigation Service Providers (ANSPs) have to handle and accommodate a continuously increasing traffic demand in a scenario that is expected to be more time-efficient and cost-efficient. Meeting the ...

    Dynamic stochastic modeling for inertial sensors 

    Wis Gil, Mariano (Date of defense: 2016-11-02)

    Es ampliamente conocido que los modelos de error para sensores inerciales tienen dos componentes: El primero es un componente determinista que normalmente es calibrado por el fabricante en el firmware de la IMU. El segundo ...

    Dynamics and control for continuous low-thrust spacecraft near collinear libration points 

    Gao, Chen (Date of defense: 2022-05-18)

    Due to the rich dynamic properties of the equilibria of the Restricted Three Body Problem (RTBP), the libration point orbits (LPOs) around them are ideal locations for scientific missions. Fortunately, these invariant ...

    Flow and heat transfer of impinging synthetic jets 

    Miró Jané, Arnau (Date of defense: 2019-06-19)

    Synthetic jets are produced by the oscillatory movement of a membrane inside a cavity, causing fluid to enter and leave through a small orifice. This results in a net jet that is able to transfer kinetic energy and momentum ...

    Galileo broadcast ephemeris and clock errors, and observed fault probabilities for ARAIM 

    Alonso Alonso, María Teresa (Date of defense: 2023-03-03)

    (English) The characterization of Clock and Ephemeris error of the Global Navigation Satellite Systems is a key element to validate the assumptions for the integrity analysis of GNSS Safety of Life (SoL) applications. ...

    Machine learning for aircraft trajectory prediction: a solution for pre-tactical air traffic flow management 

    Mateos Villar, Manuel (Date of defense: 2022-11-08)

    (English) The goal of air traffic flow and capacity management (ATFCM) is to ensure that airport and airspace capacity meet traffic demand while optimising traffic flows to avoid exceeding the available capacity when it ...

    Network-based ionospheric gradient monitoring to support ground based augmentation systems 

    Caamaño Albuerne, María (Date of defense: 2022-07-12)

    The Ground Based Augmentation System (GBAS) is a local-area, airport-based augmentation of Global Navigation Satellite Systems (GNSSs) that provides precision approach guidance for aircraft. It enhances GNSS performance ...

    Optimal trajectory management for aircraft descent operations subject to time constraints 

    Dalmau Codina, Ramon (Date of defense: 2019-06-25)

    The growth in traffic increased the pressure on the environmental sustainability of air transport. In this context, many research effort has been devoted to minimise the environmental impact in the different phases of ...

    Optimizing workspace division for multi-UAV systems 

    Skorobogatov, Georgy (Date of defense: 2023-10-27)

    (English) With the advance of UAV-related technology using several drones in the context of a single mission becomes more and more common. New problems and challenges appear as a result. When analyzing research works ...

    Spacecraft state propagation and orbit determination using jet transport 

    Chen, Jianlin (Date of defense: 2021-04-23)

    The motion of space objects is strongly nonlinear and non-integrable since it is not only affected by the Keplerian central gravity of the Earth, but also subjected to some complex perturbations. Either an accurate and ...

    Spatio-temporal quality metrics for satellite SAR interferometric data 

    Wassie, Yismaw Abera (Date of defense: 2023-07-24)

    (English) The availability of RADAR images for monitoring Earth’s surface and its changes over time prompt the development of several interferometric SAR (InSAR) algorithms and methodologies. The Multi-temporal InSAR ...

    The future of free route in the European airspace : a study quantifying the cost-benefits and safety-cost of its implementation 

    Nava Gaxiola, Cesar Antonio (Date of defense: 2019-12-19)

    Free-route airs pace perm its us ers to freely plan a route between defined entry and exit waypoints with the pos s ibility of routing 1.fa intermediate points. Flights flyíng in a free-route area remain subject to air ...

    Traffic synchronization with controlled time of arrival for cost-efficient trajectories in high-density terminal airspace 

    Sáez García, Raúl (Date of defense: 2021-10-01)

    The growth in air traffic has led to a continuously growing environmental sensitivity in aviation, encouraging the research into methods for achieving a greener air transportation. In this context, continuous descent ...

    Ubiquitous supercomputing : design and development of enabling technologies for multi-robot systems rethinking supercomputing 

    Camargo Forero, Leonardo (Date of defense: 2019-10-25)

    Supercomputing, also known as High Performance Computing (HPC), is almost everywhere (ubiquitous), from the small widget in your phone telling you that today will be a sunny day, up to the next great contribution to the ...