Programa de Doctorat en Ciència i Tecnologia Aeroespacials: Recent submissions
Now showing items 1-20 of 67
Multi-regime combustion modelling in high-fidelity numerical simulations of reacting flows
(English) The quest to reduce carbon-based emissions has led to the use of alternative fuels and combustion systems. The aviation industry presents unique challenges due to the need for high-energy fuels, with e-fuels and ...
High-performance low-dissipation algorithms for simulation of turbulent compressible flows
(English) Motivated by recent advances in computational technology aiming at exascale capabilities, which implies a need for applications capable of taking advantage of these new supercomputing archit ectures, this work ...
Aircraft trajectory estimation and guidance mode identification using bayesian filtering techniques
(English) The dissertation explores advanced methods for aircraft trajectory estimation and trajectory prediction (TP), which are critical for the next generation of Air Traffic Management (ATM) systems operating under the ...
Contributions to eco-friendly satellite lean design for a sustainable space environment
(English) Currently, half of the satellites do not reach 20% of their expected lifetime. The possibility of recycling these "zombie satellites" (ZS) with limited capabilities would optimize this on-orbit infrastructure, ...
Ground and marine resilient integration technology of multi-source sensors for navigation and positioning
(English) The present thesis focuses on the resilient terrestrial and marine technological integration for navigation and positioning based on the Global Navigation Satellite System (GNSS), the Inertial Navigation System ...
Advanced modeling of InSAR time series for ground displacement hazard assessment
(English) Natural movements of Earth and human-based activities generate continuous ground displacements, affecting human life and the economy. In order to mitigate and reduce the impact of such displacements, accurate and ...
Contributions to real-time monitoring of the ionosphere using GNSS signals
(English) This document presents the collection of four manuscripts published during my Doctoral academic formation, which main goal has been the real-time implementation of tools to monitor the ionosphere using Global ...
Optimizing workspace division for multi-UAV systems
(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 ...
Contributions to multi-purpose GNSS positioning to support multi-frequency and multi-constellation with high accuracy and integrity
(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 ...
On hybrid positioning using non-semantic image information
(English) Hybrid or multi-sensor-based positioning has been a research topic actively investigated in the last decade. In this context, the possibility of using information extracted from imaging sensors, for positioning, ...
Spatio-temporal quality metrics for satellite SAR interferometric data
(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 ...
Deep learning techniques for demand-capacity balancing
(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 ...
Counter a drone via deep reinforcement learning
(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 ...
Impulse maneuver design for a solar sail spacecraft in the restricted three-body problem framework
(English) A solar sail is a method of spacecraft propulsion that uses only the solar radiation pressure (SRP). The main research object of this thesis is a solar sail spacecraft in the artificially created libration point ...
Enhanced air traffic flow and capacity management under trajectory based operations considering traffic complexity
(English) The Air Traffic Flow and Capacity Management (ATFCM) aims at maintaining the forecast traffic demand below the estimated capacity in airports and airspace sectors. The purpose is to maintain the workload of the ...
Galileo broadcast ephemeris and clock errors, and observed fault probabilities for ARAIM
(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. ...
High-fidelity numerical simulations of reacting flows with tabulated chemistry
(English) In the transition to net-zero carbon emission technologies, turbulent combustion is expected to retain an important role in various applications. In particular, the aviation industry is projected to widely adapt ...
Contributions to high accuracy snapshot GNSS positioning
(English) Snapshot positioning is the technique to determine the position of a Global Navigation Satellite System (GNSS) receiver using only a very brief interval of the received satellite signal. In recent years, this ...
Machine learning for aircraft trajectory prediction: a solution for pre-tactical air traffic flow management
(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 ...
Sentinel-1 data exploitation for terrain deformation monitoring
Persistent Scatterer interferometry (PSI) is a group of advanced differential interferometric Synthetic Aperture Radar (SAR) techniques used to measure and monitor terrain deformation. Sentinel-1 has improved the data ...
