Exploració per tema "Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Satèl·lits i ràdioenllaços"
Ara es mostren els items 61-80 de 568
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Architectural optimization framework for earth-observing heterogeneous constellations : marine weather forecast case
(2019-01-25)
Article
Accés obertEarth observation satellite programs are currently facing, for some applications, the need to deliver hourly revisit times, subkilometric spatial resolutions, and near-real-time data access times. These stringent requirements, ... -
Architectural optimization results for a network of earth-observing satellite nodes
(2017)
Text en actes de congrés
Accés obertEarth observation satellite programs are currently facing, for some applications, the need to deliver hourly revisit times, sub-kilometric spatial resolutions and near-real-time data access times. These stringent requirements, ... -
Architectures and synchronization techniques for distributed satellite systems: a survey
(Institute of Electrical and Electronics Engineers (IEEE), 2022-04-22)
Article
Accés obertCohesive Distributed Satellite Systems (CDSSs) is a key enabling technology for the future of remote sensing and communication missions. However, they have to meet strict synchronization requirements before their use is ... -
ASG-EUPOS versus ERGNSS; comparison between Polish and Spanish GNSS permanent station networks
(Universitat Politècnica de Catalunya, 2012-03-19)
Projecte/Treball Final de Carrera
Accés restringit per decisió de l'autor
Realitzat a/amb: Uniwersytet Warmińsko-Mazurski w Olsztynie -
Assessing the quality of ionospheric models through GNSS positioning error: methodology and results
(2020-01-01)
Article
Accés obertSingle-frequency users of the global navigation satellite system (GNSS) must correct for the ionospheric delay. These corrections are available from global ionospheric models (GIMs). Therefore, the accuracy of the GIM is ... -
Assessment of a machine-vision-assisted test bed for spacecraft magnetic cleanliness analysis
(Universitat Politècnica de Catalunya, 2022-04-29)
Comunicació de congrés
Accés obertSmall satellites are becoming increasingly popular in several applications, in which attitude systems might require high precision performance. These spacecrafts are susceptible to magnetic disturbances in orbit, such as ... -
Assessment of direct positioning for IR-UWB in IEEE 802.15.4a channels
(Institute of Electrical and Electronics Engineers (IEEE), 2013)
Text en actes de congrés
Accés restringit per política de l'editorialThis paper assesses the problem of localization in IR-UWB under realistic channel models for Direct Position Estimation (DPE) approaches. DPE schemes have been proposed for positioning and localization for well developed ... -
Assessment of DME/TACAN RFI mitigation techniques in GNSS-R
(Institute of Electrical and Electronics Engineers (IEEE), 2016)
Text en actes de congrés
Accés restringit per política de l'editorialGlobal Navigation Satellite Systems Reflectometry (GNSSR) is now being recognized as a powerfull tool for remote sensing. With the addition of new frequency bands and codes, it is possible to increase the resolution and ... -
Assessment of satellite contacts using predictive algorithms for autonomous satellite networks
(Institute of Electrical and Electronics Engineers (IEEE), 2020-05-28)
Article
Accés obertUpcoming Low Earth Orbit Satellite Networks will provide low-latency and high downlink capacity necessary for future broadband communications and Earth Observation missions. This architecture was proposed at the beginning ... -
Asymptotic performance analysis of successive interference cancellation with dynamic user-decoding order
(2020-09-01)
Article
Accés obertWe address the evaluation of dynamic (estimation-based) user-decoding order in successive interference cancellation (SIC) in a proof-of-concept multiple access satellite setting in which many code-division multiple access ... -
Atmospheric turbulence profile modeling for satellite-ground laser communication
(Universitat Politècnica de Catalunya, 2015-07-23)
Projecte Final de Màster Oficial
Accés obert
Realitzat a/amb: Deutsches Zentrum für Luft-und RaumfahrtThe major limitation of free-space laser communications' performances is due to atmospheric turbulence. Free-space optical channels are characterized by a set of different parameters such as the scintillation index, the ... -
AtOx sensing using QCM for space missions
(Universitat Politècnica de Catalunya, 2023-07-03)
Treball Final de Grau
Accés restringit per acord de confidencialitatIn various space missions, the influence of atomic oxygen (AtOx) has been detected as a harmful agent that can cause damage to satellites. In this TFG it is proposed as a solution to use Quartz Crystal Microbalances (QCM). ... -
Attitude control for satellites flying in VLEO using aerodynamic surfaces
(British Interplanetary Society, 2020)
Article
Accés restringit per política de l'editorialThis paper analyses the use of aerodynamic control surfaces, whether passive or active, in order to carry out very low Earth orbit (VLEO) attitude maneuver operations. Flying a satellite in a very low Earth orbit with an ... -
Attitude determination and control system development with a low thrust propulsion system for the 3Cat-8 nano-satellite mission
(Universitat Politècnica de Catalunya, 2023-02-14)
Treball Final de Grau
Accés restringit per acord de confidencialitat
Realitzat a/amb: Institut d'Estudis Espacials de CatalunyaThis final degree thesis describes the development and implementation of an ADCS simulator for the 3Cat-8 mission of the UPC NanoSat Lab, which enables the calculation of the actuators and controller variables. Additionally, ... -
Attitude determination based on image processing
(Universitat Politècnica de Catalunya, 2022-06-21)
Treball Final de Grau
Accés restringit per decisió de l'autor
Realitzat a/amb: Université de LilleIn this report, we will explore the way to measure the angular position of a satellite, more precisely of a CubeSat, expressed with the Euler angles. We therefore consider all the rotations that are possible in a ... -
Attitude Determination using Quaternion-based Algorithms for 3Cat-4
(Universitat Politècnica de Catalunya, 2020-07-20)
Projecte Final de Màster Oficial
Accés obertThe determination of a spacecraft’s orientation is a major problem for every mission; payloads require specific characteristics to work and engines must aim the opposite direction to were the spacecraft is meant to move. ... -
Attitude estimation of a small satellite using a multi-objective optimization approach
(Universitat Politècnica de Catalunya / Imperial College London, 2010)
Projecte/Treball Final de Carrera
Accés obertThis project analyses the performance of a multi-objective optimization approach for the estimation of the rates of rotation of a small satellite, given noisy measurements of the attitude. The performance of this method ... -
Auto-tuning of RRM parameters in UMTS networks. Feasibility study.
(Universitat Politècnica de Catalunya, 2007-11-22)
Projecte Final de Màster Oficial
Accés obertThe present PFC is located inside the framework of the UMTS networks, and more specifically in the development of new Radio Resource Management (RRM) algorithms capable to maximize the capacity and the performance of the ... -
Automatic ship detection in SAR satellite images: performance assessment
(Institute of Electrical and Electronics Engineers (IEEE), 2015)
Text en actes de congrés
Accés restringit per política de l'editorialThis paper presents the benchmarking of four ship detection systems based on satellite borne Synthetic Aperture Radar data. This research, carried out within the framework of the FP7 NEREIDS project, provides a detailed ... -
Automation of the determination of Inertia Tensors of CubeSats using torsion pendulum period measurements
(Universitat Politècnica de Catalunya, 2020-09-07)
Treball Final de Grau
Accés obertContexto: Los CubeSats constituyen el estándar de satélites pequeños más extendido, prácticamente desde que fueron presentados a finales de la década de 1990. Los CubeSats revolucionaron la industria espacial. Gracias a ...