A geodetic approach to precise, accurate, available and reliable navigation 

    Parés Calaf, M. Eulàlia (Date of defense: 2021-01-14)

    The determination of a body position, velocity and attitude is the purpose of the navigation techniques. The most extended navigation systems (INS/GNSS), as any other HW and SW system, provide precise and accurate enough ...

    Consolidation and assessment of a technique to provide fast and precise point positioning (Fast-PPP) 

    Rovira Garcia, Adrià (Date of defense: 2016-01-21)

    The research of this paper-based dissertation is focused on the Fast Precise Point Positioning (Fast-PPP) technique. The novelty relies on using an accurate ionosphere model, in combination with the standard precise satellite ...

    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 ...

    Estudio de las propiedades fisicas en regiones chocadas en nebulosas planetarias 

    Castrillón Camacho, Arjuna (Date of defense: 2021-05-12)

    Planetary nebulae play a very important role in the chemical evolution of galaxies since they are responsible for returning nuclear-processed material to the interstellar medium. Observations of planetary nebulae are used ...

    Global ionospheric maps : estimation and assessment in post-processing and real-time 

    Roma Dollase, David (Date of defense: 2019-04-09)

    The research of this paper-based dissertation is focused on Global Ionospheric Maps (GIM) generation and assessment. In summary, the novelty and thematic unity in this works relies on four different but complementary topics: ...

    ISFAA : Implicit SPH for astrophysical apllications 

    Escartín Vigo, José Antonio (Date of defense: 2016-01-21)

    Computational simulation is one of the basic techniques of modern Astrophysics. The long-term time astrophysical processes cannot be treated with explicit approaches because that they are limited, in their maximum time ...

    Observation and interpretation of type IIB supernova explosions 

    Morales Garoffolo, Antonia (Date of defense: 2016-03-08)

    Core-collapse supernovae (CC-SNe) explosions represent the final demise of massive stars. Among the various types, there is a group of relatively infrequent CC-SNe termed type IIb, which appear to be hybrids between normal ...

    On hybrid positioning using non-semantic image information 

    Angelats Company, Eduard (Date of defense: 2023-10-04)

    (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, ...

    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 ...

    Optimization on industrial problems focussing on multi-player strategies 

    Coma Company, Martí (Date of defense: 2022-07-26)

    Algorithms (EA) are useful optimization methods for exploration of the search space, but they usually have slowness problems to exploit and converge to the minimum with accuracy. On the other hand, gradient based methods ...

    Population synthesis studies of the white dwarfs of the galactic disk and halo 

    Cojocaru, Elena-Ruxandra (Date of defense: 2016-11-24)

    As the evolutionary end-point of most main-sequence stars, white dwarfs can be used to infer important properties concerning the formation and evolution of the different Galactic stellar populations. Population synthesis ...

    Thermal diagnostics experiments for LISA Pathfinder 

    Gibert Gutiérrez, Ferran (Date of defense: 2016-02-23)

    The LISA Pathfinder project is an ESA/NASA technology demonstrator mission that must test the critical instrumentation required for a future space-borne gravitational wave observatory based on the LISA design. The satellite, ...

    Three-dimensional SPH simulations of the interaction between the nova ejecta and the companion star 

    Figueira, Joana (Date of defense: 2023-05-31)

    (English) Classical and Recurrent novae are thermonuclear explosions hosted by accreting white dwarfs in stellar binary systems. Material piles up on top of the white dwarf star under mildly degenerate conditions, driving ...