Now showing items 1-20 of 289

  • 3D FEM model of ground deformation in Deception Island (Antarctica) 

    Garrido Ballart, Sònia (Universitat Politècnica de Catalunya, 2017-06-16)
    Master thesis
    Open Access
    Covenantee:  Institut de Ciències de la Terra Jaume Almera
    Ground deformation has been demonstrated to be one of the most common signals of volcanic unrest. A variety of processes can cause ground deformation in active volcanic areas (e.g. magmatic processes, pore pressure ...
  • AATR an ionospheric activity indicator specifically based on GNSS measurements 

    Juan Zornoza, José Miguel; Sanz Subirana, Jaume; Rovira Garcia, Adrià; González Casado, Guillermo; Ibáñez Segura, Deimos; Orús Pérez, Raul (2018-03-01)
    Article
    Open Access
    This work reviews an ionospheric activity indicator useful for identifying disturbed periods affecting the performance of Global Navigation Satellite System (GNSS). This index is based in the Along Arc TEC Rate (AATR) and ...
  • Accesibilidad en interiores mediante Unity y Google Maps 

    Garcia Galvez, Brian (Universitat Politècnica de Catalunya, 2015-02-05)
    Bachelor thesis
    Restricted access - author's decision
    Imagine being in a foreign airport where you do not know the language or, even worst, you do not know the alphabet. You open the application, the locator introduces your ticket and when you get all the relevant information, ...
  • Accuracy and precision studies for range-only underwater target tracking in shallow waters 

    Masmitjà Rusiñol, Ivan; Bouvet, Pierre-Jean; Gomáriz Castro, Spartacus; Aguzzi, Jacopo; Río Fernandez, Joaquín del; Toma, Daniel (2017)
    Conference report
    Open Access
    This paper studies the precision, and the accuracy, of an underwater target tracking system, using range-only and single-beacon methods, in shallow waters environments. For this study, different field tests have been ...
  • Accuracy of ionospheric models used in GNSS and SBAS: methodology and analysis 

    Rovira Garcia, Adrià; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; González Casado, Guillermo; Ibáñez Segura, Deimos (2016-03-01)
    Article
    Restricted access - confidentiality agreement
    © 2015, Springer-Verlag Berlin Heidelberg. The characterization of the accuracy of ionospheric models currently used in global navigation satellite systems (GNSSs) is a long-standing issue. The characterization remains a ...
  • A Collaborative Protocol for Private Retrieval of Location-Based Information 

    Rebollo Monedero, David; Forné Muñoz, Jorge; Subirats Maté, Laia; Solanas, Agustí; Martínez-Ballasté, Antoni (IADIS Press, 2009)
    Conference lecture
    Open Access
    Privacy and security are paramount for the proper deployment of location-based services (LBSs). We present a novel protocol based on user collaboration to privately retrieve location-based information from an LBS provider. ...
  • A context-aware model to provide positioning in disaster relief scenarios 

    Moreno, Daniel; Ochoa, Sergio; Meseguer Pallarès, Roc (2015-10-01)
    Article
    Open Access
    The effectiveness of the work performed during disaster relief efforts is highly dependent on the coordination of activities conducted by the first responders deployed in the affected area. Such coordination, in turn, ...
  • Adaptive Kalman Filter-Based Phase-Tracking in GNSS 

    Gómez Arias, Mario (Universitat Politècnica de Catalunya, 2010-10-04)
    Bachelor thesis
    Open Access
    This work introduces, implements and evaluates different adaptive Kalman filtering techniques based on the innovation autocorrelation function. The reason of considering these adaptive techniques is the effect of a wrong ...
  • A direct method to estimate atmospheric phase delay for insar with global atmospheric models 

    Hu, Zhongbo; Mallorquí Franquet, Jordi Joan (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference lecture
    Restricted access - publisher's policy
    Differential Interferometric Synthetic Aperture Radar (DInSAR) has proved its unprecedented advantages of monitoring ground deformation on large scale with centimeter to millimeter precision in the last two decades. However, ...
  • Advanced ground based and satellite based precision approach systems 

    Lopez Beltran, Xavier (Universitat Politècnica de Catalunya, 2012-06-08)
    Bachelor thesis
    Open Access
    This final degree project is divided in two differentiated blocks. In the first one, an analysis of the actual landing systems is made, explaining how they work, their requirements and the advantages and disadvantages of ...
  • Advanced methods of integration of GNSS and 3D models for positioning in deep urban canyons 

    Ortega González, Héctor (Universitat Politècnica de Catalunya, 2017-10)
    Bachelor thesis
    Open Access
    Classical GNSS positioning in urban environments presents a variety of problems such as satellite signal blockage, reflection and fading, mainly caused by buildings. These issues reduce the number of available satellites, ...
  • A generic simulator for aperture synthesis radiometers: Radiative transfer module and end-to-end tests 

    Camps Carmona, Adriano José; Hyuk, Park; Barbosa, José; Bandeiras, J.; Sousa, Ana; d'Addio, Salvatore; Martín Neira, Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Conference lecture
    Restricted access - publisher's policy
    The Synthetic Aperture Interferometric Radiometer (SAIR) Performance Simulator (SAIRPS) is a very versatile software tool developed by Deimos Engenharia (Portugal) and the Universitat Politècnica de Catalunya-Barcelona ...
  • Airborne GNSS-R wind retrievals using delay-doppler maps 

    Rodriguez Alvarez, N.; Akos, D.M.; Zavorotny, Valery U.; Smith, Jeffrey; Camps Carmona, Adriano José; Fairall, C.W. (Institute of Electrical and Electronics Engineers (IEEE), 2013-01)
    Article
    Restricted access - publisher's policy
    Global navigation satellite system (GNSS) reflectometry has emerged recently as a promising remote sensing tool to retrieve various geophysical parameters of the Earth's surface. GNSS-reflected signals, after being received ...
  • Ajust de models de geoide a la comarca de L'Alt Empordà 

    Barneda Suñer, Enric (Universitat Politècnica de Catalunya, 2012-04-18)
    Master thesis (pre-Bologna period)
    Restricted access - author's decision
    L’objectiu del projecte consisteix en la comparativa entre diferents models de geoide que comprenen la zona de l’Alt Empordà i el posterior ajust per tal de mostrar quin és el que millor s’adapta a la zona i conèixer la ...
  • Altimetry with GNSS-R interferometry: first proof of concept experiment 

    Martín Neira, Manuel; Altena, B.; van Bree, R.; Van Der Marel, H.; Camps Carmona, Adriano José; Rius, Antonio; Nogués Correig, O.; Ribó Vedrilla, Serni; Cardellach, Estel; Oliveras, S.; Valencia Domènech, Enric; Hyuk, Park; Tarongí Bauzá, José Miguel (2012-04)
    Article
    Restricted access - publisher's policy
    The Global Navigation Satellite System Reflectometry (GNSS-R) concept was conceived as a means to densify radar altimeter measurements of the sea surface. Until now, the GNSS-R concept relied on open access to GNSS ...
  • A method for scintillation characterization using geodetic receivers operating at 1 Hz 

    Juan Zornoza, José Miguel; Aragón Ángel, Maria Angeles; Sanz Subirana, Jaume; González Casado, Guillermo; Rovira Garcia, Adrià (2017-05-08)
    Article
    Open Access
    Ionospheric scintillation produces strong disruptive effects on global navigation satellite system (GNSS) signals, ranging from degrading performances to rendering these signals useless for accurate navigation. The current ...
  • Anàlisi del rendiment i operativitat d'un sistema de navegació GPS/rasant suportat amb un giròscop i un odòmetre 

    Orozco García, Margarita; Ortega Moya, Sergio (Universitat Politècnica de Catalunya, 2000-09-12)
    Master thesis (pre-Bologna period)
    Restricted access - author's decision
  • An alternative wearable tracking system based on a low-power wide-area network 

    Fernández García, Raúl; Gil Galí, Ignacio (2017-03-14)
    Article
    Open Access
    This work presents an alternative wearable tracking system based on a low-power wide area network. A complete GPS receiver was integrated with a textile substrate, and the latitude and longitude coordinates were sent to ...
  • Analysis of Assisted GPS in LTE-Advanced networks and its applications to traditional and VTL based software receivers: Part II 

    Figueroa Naharro, Marta; Torné Sanjosé, Albert (Universitat Politècnica de Catalunya, 2013-05-30)
    Master thesis (pre-Bologna period)
    Open Access
    [ANGLÈS] The performance of GPS, and all GNSS, degrades significantly in urban canyons and in indoor environments. There has been significant research in order to enhance the performance of a GPS receiver in such challenging ...
  • Analysis of scintillation measurement errors in GNSS signals 

    Díaz Quintairos, David (Universitat Politècnica de Catalunya, 2019-04-24)
    Bachelor thesis
    Open Access
    Covenantee:  Politecnico di Torino
    Scintillation is a disturbance induced by the ionosphere, the farther layer of the atmosphere in which free ions (electrons) are present. These electrons vary in quantity according to many factors related to Solar activity ...