Exploració per tema "Satèl·lits"
Ara es mostren els items 21-40 de 51
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Estudi sobre la viabilitat de diferents tecnologies per eliminar les zones amb accés restringit a Internet
(Universitat Politècnica de Catalunya, 2022-10-27)
Treball Final de Grau
Accés obertNowadays, 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
(Universitat Politècnica de Catalunya, 2007-11-07)
Projecte/Treball Final de Carrera
Accés obertL’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
(Universitat Politècnica de Catalunya, 2014-11-20)
Tesi
Accés obertThis 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
(Universitat Politècnica de Catalunya, 2022-07-15)
Treball Final de Grau
Accés obert
Realitzat a/amb: SENERThe 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
(Universitat Politècnica de Catalunya, 2021-10-28)
Projecte Final de Màster Oficial
Accés obertSatellite 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
(Universidad Politécnica de Madrid (UPM), 1988)
Text en actes de congrés
Accés obertThe 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
(Universitat Politècnica de Catalunya, 2022-09-30)
Projecte Final de Màster Oficial
Accés obertAn 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
(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'EspaceThis 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
(VDE Conference Publications, 2010)
Text en actes de congrés
Accés restringit per política de l'editorialMultibeam 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
(2014)
Text en actes de congrés
Accés obertThe 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
(Universitat Politècnica de Catalunya, 2023-07)
Projecte Final de Màster Oficial
Accés obertLow 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
(Universitat Politècnica de Catalunya, 2012-07-03)
Projecte/Treball Final de Carrera
Accés obertAquest 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
(2022-12)
Article
Accés obertInformation 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
(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
(2016-10-11)
Article
Accés obertIn 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
(IEEE Institute of Electrical and Electronics Engineers, 2007-01-31)
Article
Accés obertThe 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
(Universitat Politècnica de Catalunya, 2023-10-31)
Projecte Final de Màster Oficial
Accés obertIn 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
(Universitat Politècnica de Catalunya, 2023-05-18)
Projecte Final de Màster Oficial
Accés restringit per acord de confidencialitat
Realitzat a/amb: ArtelysHaving 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).
(Universitat Politècnica de Catalunya, 2019-09-29)
Projecte Final de Màster Oficial
Accés obertThe 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
(Universitat Politècnica de Catalunya, 2023-02-09)
Projecte Final de Màster Oficial
Accés restringit per acord de confidencialitat