Now showing items 1-20 of 334

    • 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 ...
    • 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, ...
    • 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, ...
    • 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 ...
    • 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 ...
    • A new approach to gross error detection for GPS networks 

      Dalfó Simó, Cristina; Fiol Mora, Miquel Àngel (2019-05-29)
      Article
      Open Access
      We present a new matrix-based approach to detect and correct gross errors in GPS geodetic control networks. The study is carried out by introducing a new matrix, whose entries are powers of a (real or complex) variable, ...
    • A numerical simulator to evaluate the electromagnetic bias in GNSS-R altimetry 

      Ghavidel, Ali; Schiavulli, Domenico; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Conference lecture
      Restricted access - publisher's policy
      This paper presents the computed electromagnetic (EM) bias predicted for GNSS-R altimetry systems. First, a synthetic time-evolving sea surface is generated satisfying an ocean surface height spectrum. Then, a direct GNSS ...
    • A review of higher order ionospheric refraction effects on dual frequency GPS 

      Petrie, Elisabeth J.; Hernández Pajares, Manuel; Spalla, Paolo; Moore, Philip; King, Matt A. (2010-11-26)
      Article
      Restricted access - publisher's policy
      Abstract Higher order ionospheric effects are increasingly relevant as precision requirements on GPS data and products increase. The refractive index of the ionosphere is affected by its electron content and the magnetic ...
    • A simulator for GNSS-R polarimetric observations over the ocean 

      Schiavulli, Domenico; Ghavidel, Ali; Camps Carmona, Adriano José; Migliaccio, Muriccio (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Conference report
      Restricted access - publisher's policy
      Global Navigation Satellite Systems - Reflec-tometry (GNSS-R) represents an innovative tool for remote sensing. In this paper a facet-based simulator is presented to investigate the polarimetric characteristics of GNSS ...
    • A stratospheric balloon GNSS-R experiment: The 3Cat-2 project in DLR/SNSB BEXUS 

      Carreño Luengo, Hugo; Camps Carmona, Adriano José; Querol Borràs, Jorge; Forte Veliz, Giuseppe Francesco; Onrubia Ibáñez, Raúl; Díez, Raúl (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Conference lecture
      Restricted access - publisher's policy
      Universitat Politècnica de Catalunya (UPC) - BarcelonaTech Remote Sensing Laboratory focus on the development of breakthrough concepts. The 3Cat-2 mission is on the synergy of GNSS reflectometry and the CubeSat concept. ...
    • A transportation security system applying RFID and GPS 

      Zhang, Ruijian (School of Industrial and Aeronautic Engineering of Terrassa (ETSEIAT). Universitat Politècnica de Catalunya (UPC), 2013-04)
      Article
      Open Access
      Purpose: This paper is about developing a centralized, internet based security tool which utilizes RFID and GPS technology to identify drivers and track the load integrity. Design/methodology/approach: The system will ...
    • A Worldwide ionospheric model for fast precise point positioning 

      Rovira Garcia, Adrià; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; González Casado, Guillermo (Institute of Electrical and Electronics Engineers (IEEE), 2015-03-03)
      Article
      Open Access
      Fast precise point positioning (Fast-PPP) is a satellite-based navigation technique using an accurate real-time ionospheric modeling to achieve high accuracy quickly. In this paper, an end-to-end performance assessment of ...
    • 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 ...
    • 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 ...
    • ADDTID: An alternative tool for studying earthquake/tsunami signatures in the ionosphere. Case of the 2011 Tohoku earthquake 

      Yang, Heng; Monte Moreno, Enrique; Hernández Pajares, Manuel (Multidisciplinary Digital Publishing Institute (MDPI), 2019-09-13)
      Article
      Open Access
      Traveling Ionospheric Disturbances (ADDTID) algorithm. This algorithm automatically detects and characterizes Traveling Ionospheric Disturbances (TIDs) from Global Navigation Satellite System (GNSS) measurements. Applying ...
    • 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 ...