Exploració per tema "Satèl·lits artificials"

Ara es mostren els items 21-40 de 321

    • Analysis of jet transport-based geostationary trajectory uncertainty propagation 

      Chen, Jianlin; Masdemont Soler, Josep; Gerard, Gómez; Jianping, Yuan (2020-03-31)
      Article
      Accés obert

    • Analysis of Medium-Earth Orbit Radiation Effects in Digital Systems for Spacecraft 

      Gorchs Picas, Marti (Universitat Politècnica de Catalunya, 2022-05-25)
      Treball Final de Grau
      Accés obert
      Realitzat a/amb:   Université Grenoble Alpes
      Field-programmable gate array (FPGA) are very appealing for space-based applications thanks to their great flexibility, allowing reconfiguration during spaceflight. However, they are sensitive to space radiation, especially ...

    • Analysis on the feasability of airborne GNSS-R receivers for weather nowcasting and target detection 

      Pérez Portero, Adrián; Muñoz Martin, Joan Francesc; Camps Carmona, Adriano José (2020)
      Comunicació de congrés
      Accés obert
      Weather forecast relies to a large extent on data acquired by satellite. LEO polar satellites provide global coverage, but poor spatial resolution. GEO satellites provide a better coverage and revisit time, at expenses of ...

    • Anàlisi de viabilitat d'un satèl·lit en òrbita LEO 

      Benzal Santamaria, Luis Alberto; Velasco Carcaboso, Vanessa (Universitat Politècnica de Catalunya, 2010-01-20)
      Treball Final de Grau
      Accés obert
      The present work analyses the requirements related to the orbit and the effects of the space radiation on Polosat, a toy-model satellite whose main goal is to monitor and image the Earth Poles. Our main objective has ...

    • Anomalies study in VTEC from SMOS data 

      Roura Garcés, Sergi (Universitat Politècnica de Catalunya, 2023-07-06)
      Treball Final de Grau
      Accés obert
      The main goal is to analyze the SMOS measurements and determine if there is any sign on them that could determine the possible effects of these natural phenomena on the ionosphere.

    • AOCS of a nanosatellite type CubeSat 1U based on reaction wheels 

      Skiba Maldonado, Victoria (Universitat Politècnica de Catalunya, 2020-07-14)
      Treball Final de Grau
      Accés obert
      Realitzat a/amb:   European Space Astronomy Centre
      The European Agency is currently developing a 3U CubeSat, aimed to transmit to Earth well-defined reference signals which will be used to calibrate ground-based Cosmic microwave background (CMB) polarimeters. In order to ...

    • Applying autonomy to distributed satellite systems 

      Araguz López, Carles; Bou Balust, Elisenda; Alarcón Cot, Eduardo José (2016)
      Text en actes de congrés
      Accés obert
      The need for autonomy in several fields of aerospace engineering has become apparent and widely accepted during the last decade. Autonomy promises to improve the systems' performances, their robustness and tolerance to ...

    • Applying autonomy to distributed satellite systems: Trends, challenges, and future prospects 

      Araguz López, Carles; Bou Balust, Elisenda; Alarcón Cot, Eduardo José (2018-03-26)
      Article
      Accés obert
      While monolithic satellite missions still pose significant advantages in terms of accuracy and operations, novel distributed architectures are promising improved flexibility, responsiveness, and adaptability to structural ...

    • Architectural optimization results for a network of earth-observing satellite nodes 

      Araguz López, Carles; Llaveria Godoy, David; Lancheros Sepulveda, Estefany Maria; Bou Balust, Elisenda; Camps Carmona, Adriano José; Alarcón Cot, Eduardo José; Lluch i Cruz, Ignasi; Matevosyan, Hripsime; Golkar, Alessandro; Tonetti, Stefania; Cornara, Stefania; Cote, Judith; Pierotti, Stéphane; Rodríguez, Pedro; Alvaro Sanchez, A.; Sochacki, Mateusz; Narkiewicz, Janusz (2017)
      Text en actes de congrés
      Accés obert
      Earth 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 

      Martínez Marrero, Liz; Merlano-Duncan, Juan Carlos; Querol Borràs, Jorge; Kumar, Sumit; Krivochiza, Jevgenij; Krishna Sharma, Shree; Chatzinotas, Symeon; Camps Carmona, Adriano José; Ottersten, Björn (Institute of Electrical and Electronics Engineers (IEEE), 2022-04-22)
      Article
      Accés obert
      Cohesive 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 ...

    • Assessment of a machine-vision-assisted test bed for spacecraft magnetic cleanliness analysis 

      Sans Monguiló, Alejandro; Adiwiluhung Riwanto, Bagus; Praks, Jaan (Universitat Politècnica de Catalunya, 2022-04-29)
      Comunicació de congrés
      Accés obert
      Small 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 ...

    • Atmospheric Tomography Using Satellite Radio Signals 

      Flores Jiménez, Alejandro (Universitat Politècnica de Catalunya, 2000-02-04)
      Tesi
      Accés obert
      Los sistemas de posicionamiento global GNSS (GPS y GLONASS) se han convertido en una herramienta básica para obtener medidas geodésicas de la Tierra y en una fuente de datos para el estudio atmosférico. Proporcionan cobertura ...

    • Attitude control research with educational nanosatellites 

      Martínez, Úrsula; Bravo, Luis; Gligor, Dan; Olfe, Karl; Bello, Álvaro; Ezquerro, José Miguel; Rodríguez, Jacobo; Salgado, Pablo (Universitat Politècnica de Catalunya, 2022-04-29)
      Comunicació de congrés
      Accés obert
      This paper introduces the three-axis attitude control of the ESAT platform. ESAT is a modular nanosatellite that implements the popular 10x10x10 cm CubeSat standard, designed for hands-on learning at different educational ...

    • Attitude determination and control system development with a low thrust propulsion system for the 3Cat-8 nano-satellite mission 

      Navarro Simoni, Pol Eduard (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 Catalunya
      This 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 

      Lemaire Lemaire, Adrien (Universitat Politècnica de Catalunya, 2022-06-21)
      Treball Final de Grau
      Accés restringit per decisió de l'autor
      Realitzat a/amb:   Université de Lille
      In 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 ...

    • Back-end receivers for Metop Second Generation radiometers 

      Albajar Garduño, Marc; Monill Homs, Albert; Ramírez García, Joan; Catalán Artigas, Albert; Torralba, Ana; Capdevila Vives, Joan (European Space Agency (ESA), 2022)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      MetOp Second Generation (SG) satellites will give continuity to MetOp-A, -B and -C satellites launched in 2006, 2012 and 2016 respectively. MetOp-SG consists of two series of satellites (Satellite A and B) with three ...

    • Bounded gain-scheduled LQR satellite control using a tilted wheel 

      Martin Estraña, Veronica (Universitat Politècnica de Catalunya, 2017-05-05)
      Treball Final de Grau
      Accés obert
      Realitzat a/amb:   École polytechnique de Montréal
      From the beginning of the satellite usage, the momentum created by its movements has been a concern that has to be taken into account for every space mission. Depending on the dimensions, ...

    • Business roadmap for the European Union in the NewSpace ecosystem: a case study for access to space 

      Rodríguez Donaire, Silvia; GIL MORA, PAULINO; García-Almiñana, Daniel; Crisp, Nicholas H.; HERDRICH, GEORG; Roberts, Peter C.E; KATARIA, DHIREN; HANESSIAN, VIRGINIA; Becedas, Jonathan; SEMINARI, SIMON (2022-10)
      Article
      Accés obert
      A business roadmap is a high-level strategic management tool that maps the actions to develop new industries. It serves as a guide to plan and forecast technological, market and product developments in a more operational ...

    • CANSAT Competition 2020: Best technical development by OrbiSat team 

      Hernando Diaz, David (Universitat Politècnica de Catalunya, 2022-04-29)
      Comunicació de congrés
      Accés obert
      OrbiSat is a high school educational project that was part of the CANSAT SPAIN 2020 student competition organized by ESERO. This project has ranked first in the Catalonia Championship and second at the National Championship, ...

    • Caracteritzation of noise in MEMS accelerometres for femtosats 

      Liebana Moradillo, Oscar (Universitat Politècnica de Catalunya, 2018-07-27)
      Treball Final de Grau
      Accés obert
      Realitzat a/amb:   NanoSat Lab
      The aim of this thesis is to determine the characteristics of the noise of an ultralow noise MEMS accelerometer. The study of these characteristics will allow to determine if the accelerometer can be used in the scientific ...