Ara es mostren els items 21-40 de 51

    • Estudi sobre la viabilitat de diferents tecnologies per eliminar les zones amb accés restringit a Internet 

      Planell Lluis, Marcel (Universitat Politècnica de Catalunya, 2022-10-27)
      Treball Final de Grau
      Accés obert
      Nowadays, Internet access is becoming a valued and essential asset to ensure the economic development, growth and profit of any human being, company or institution. For years now, the most developed regions of the world ...
    • Fusió d’imatges de satèl·lit. Implementació en OpenEV 

      Gómez Clapers, Joan (Universitat Politècnica de Catalunya, 2007-11-07)
      Projecte/Treball Final de Carrera
      Accés obert
      L’objectiu d’aquest treball és generar una documentació suficient com per poder crear, en posteriors projectes, un software a través del qual es pugui treballar amb dades generades a partir d’imatges de satèl·lit. El sistema ...
    • Geosynchronous synthetic aperture radar for Earth continuous observation missions 

      Ruiz Rodon, Josep (Universitat Politècnica de Catalunya, 2014-11-20)
      Tesi
      Accés obert
      This thesis belongs to the field of remote sensing, particularly Synthetic Aperture Radar (SAR) systems from the space. These systems acquire the signals along the orbital track of one or more satellites where the transmitter ...
    • Honeycomb panel sizing as support to ship payload onboard satellites 

      Fernández Temprado, Raimon (Universitat Politècnica de Catalunya, 2022-07-15)
      Treball Final de Grau
      Accés obert
      Realitzat a/amb:   SENER
      The objective of this work is the study and sizing of honeycomb panels, as a base/platform for flight equipment on board satellites. The specific structural design and calculation standards have been developed, which allow ...
    • Improving root zone soil moisture estimation from surface remote sensing measurements 

      Mengyi, Gao (Universitat Politècnica de Catalunya, 2021-10-28)
      Projecte Final de Màster Oficial
      Accés obert
      Satellite soil moisture provides a wider range of spatial data than in-situ observations. Satellites are sensitive to measuring soil moisture in a few centimetres of the soil layer. However, root zone soil moisture is more ...
    • Mezclador equilibrado a 30 GHz para la recepción de la baliza B2 del satélite Olympus 

      Artal, Eduardo; Comerón Tejero, Adolfo (Universidad Politécnica de Madrid (UPM), 1988)
      Text en actes de congrés
      Accés obert
      The design and performance of a 30-GHz mixer is presented. The mixer is to be used in the RF front end of an earth station for the OPEX experiment with the propagation beacons of the ESA's Olympus satellite. It uses a ...
    • Millora i validació d'un model basat en imatges satèl·lit per caracteritzar vegetació en vinya 

      Puyó Masagué, Ferran (Universitat Politècnica de Catalunya, 2022-09-30)
      Projecte Final de Màster Oficial
      Accés obert
      An effective and efficient characterization of the vegetation is key to being able to determine the appropriate amount of phytosanitary product to be applied when carrying out phytosanitary treatments in the vineyard. ...
    • Modelling of SpaceFibre networks 

      Jané Abad, Jaume (Universitat Politècnica de Catalunya, 2018-10-30)
      Projecte Final de Màster Oficial
      Accés restringit per decisió de l'autor
      Realitzat a/amb:   Thales Alenia Space / Institut Supérieur de l'Aéronautique et de l'Espace
      This work presents the implementation of the SpaceFibre protocol for the network simulator MOST NS-3. On board data networks interconnect satellite's modules with mixed requirements on time of deliver delay and jitter. For ...
    • Multiple gateway precoding with per feed power constraints for multibeam satellite systems 

      Joroughi, Vahid; Vazquez, Miguel Angel; Pérez Neira, Ana Isabel (VDE Conference Publications, 2010)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Multibeam satellite systems have been recently studied in order to provide broadband services to their coverage area by employing fractional frequency reuse pattern. Towards a more spectrally efficient system, the designer ...
    • Natural configurations for formation flying around triangular libration points for the elliptic and the bicircular problem in the earth-moon system 

      Salazar, Francisco; Winter, O. C.; Macau, E.E.N.; Masdemont Soler, Josep; Gómez Muntané, Gerard (2014)
      Text en actes de congrés
      Accés obert
      The concept of Satellite Formation Flying (SFF) means to have two or more satellites in orbit such that their relative positions remain constant or obeying a certain dynamical configuration along the trajectory. This ...
    • Optimal transmit array processing: a study for satellite communications 

      Carreras Mallol, Sergi (Universitat Politècnica de Catalunya, 2023-07)
      Projecte Final de Màster Oficial
      Accés obert
      Low Earth Orbit satellite communications nowadays are an increasingly popular method to provide coverage and Internet access globally. Worldwide companies such as SpaceX (via Starlink) or ViaSat are launching full ...
    • Pinyó reversible 

      Ripol Revuelta, Francesc; Padrós Vera, Oriol (Universitat Politècnica de Catalunya, 2012-07-03)
      Projecte/Treball Final de Carrera
      Accés obert
      Aquest projecte final de carrera té com a finalitat estudiar la viabilitat de la creació, partint des de zero, d’un sistema que permeti combinar els avantatges i desavantatges del actuals sistemes d’engranatges de pinyó ...
    • Potential use of space-based lightning detection in electric power systems 

      Montañá Puig, Juan; López Trujillo, Jesús Alberto; Van der Velde, Oscar Arnoud; Solà de las Fuentes, Glòria; Romero Durán, David; Morales Rodríguez, Carlos Augusto; Visacro, Silverio; Saba, Manuel; Goodman, Steven J.; Williams, Earle R.; Peterson, Michael J.; Pineda, Nicolau; Sousa Arcanjo, Marcelo Augusto; Aranguren Fino, Daniel (2022-12)
      Article
      Accés obert
      Information about lightning activity and its parameters is necessary to design and evaluate the lightning protection of an electrical power system. This information can be obtained from ground-based lightning detection ...
    • Power processing unit design for Helicon plasma thruster 

      Cánovas Pastor, Carlos (Universitat Politècnica de Catalunya, 2019-10)
      Projecte Final de Màster Oficial
      Accés restringit per decisió de l'autor
    • Pseudo-heteroclinic connections between bicircular restricted four-body problems 

      Barrabés Vera, Esther; Gómez Muntané, Gerard; Mondelo González, José María; Ollé Torner, Mercè (2016-10-11)
      Article
      Accés obert
      In this paper, we show a mechanism to explain transport from the outer to the inner Solar system. Such a mechanism is based on dynamical systems theory. More concretely, we consider a sequence of uncoupled bicircular ...
    • Robust array configuration for a microwave interferometric radiometer: application to the geoSTAR project 

      Torres Torres, Francisco; Tanner, Alan B.; Brown, S. T.; Lambrigsten, Bjorn H. (IEEE Institute of Electrical and Electronics Engineers, 2007-01-31)
      Article
      Accés obert
      The Geostationary Synthetic Thinned Array Radiometer represents a promising new approach to microwave atmospheric sounding from geostationary orbit based on passive interferometry. One of the major concerns about the ...
    • Satellite Laser Ranging network contact planning and performance assessment under adverse meteorological conditions 

      Cugota Latorre, Carles (Universitat Politècnica de Catalunya, 2023-10-31)
      Projecte Final de Màster Oficial
      Accés obert
      In recent timeps, SLR (Satellite Laser Ranging) is being used lately for orbit determination in many satellite constellations. It improves the accuracy of traditional radiofrequency systems by using laser transmitters, but ...
    • Satellite maneuver detection 

      Denis, Clément Edouard Raymond (Universitat Politècnica de Catalunya, 2023-05-18)
      Projecte Final de Màster Oficial
      Accés restringit per acord de confidencialitat
      Realitzat a/amb:   Artelys
      Having the capability to acquire insightful knowledge about the spatial environment is crucial and pressing for States, as it is closely linked to sovereignty, security and intelligence issues. One important aspect of it ...
    • Seasonal and inter-annual variability of sea surface temperature and sea surface winds in Inhambane Bay (Mozambique). 

      Ortiz Porras, Cristina (Universitat Politècnica de Catalunya, 2019-09-29)
      Projecte Final de Màster Oficial
      Accés obert
      The availability of new generation remote sensing data set in unprecedent resolution allows to investigate the dynamics of coastal areas with a long-term perspective. In this sense, Inhamabne Bay (Mozambique) is an unexplored ...
    • Second life for zombie satellites 

      El Khayati Ramouz, Mohamed (Universitat Politècnica de Catalunya, 2023-02-09)
      Projecte Final de Màster Oficial
      Accés restringit per acord de confidencialitat