Recent Submissions

  • Aerodynamic Technologies for Earth Observation Missions in Very Low earth Orbit 

    Becedas, Jonathan; González, Gerardo; Domínguez, Rosa María; García-Almiñana, Daniel; Rodríguez Donaire, Silvia; Sureda Anfres, Miquel (2018)
    Conference report
    Restricted access - publisher's policy
    Flying at VLEO has several advantages such as the increase of the resolution of images recorded by optical instruments, the increase of geospatial position accuracy, the improvement of the signal to noise ratio and the ...
  • Analysis and prediction of COVID-19 for EU-EFTA-UK and other countries 

    Català Sabaté, Martí; Cardona Iglesias, Pere Joan; Prats Soler, Clara; Alonso Muñoz, Sergio; Álvarez Lacalle, Enrique; Marchena Angos, Miquel; Conesa, David; López Codina, Daniel (2020-10-19)
    External research report
    Open Access
    The present report aims to provide a comprehensive picture of the pandemic situation of COVID-19 in the EU countries, and to be able to foresee the situation in the next coming days. We provide some figures and tables ...
  • Comparative study of mechanical and electrical relaxations in poly(etherimide). Part 2 

    Diaz Calleja, Ricardo; Friederichs, S.; Jaímes, C.; Sanchis, Jose Maria; Belana Punseti, Juan; Cañadas Lorenzo, Juan Carlos; Diego Vives, José Antonio; Mudarra López, Miguel (1998-05)
    Article
    Restricted access - publisher's policy
    The curves describing the relaxation behaviour of poly(etherimide) at several frequencies shows in the dielectric lossÈtemperature plot c and b relax- ations centred at [95¡C and 100¡C, respectively, at 10 Hz. The glassÈrubber ...
  • The benefits of very low earth orbit for earth observation missions 

    Crisp, Nicholas H.; Roberts, Peter C.E; Livadiotti, Sabrina; García-Almiñana, Daniel; Rodríguez Donaire, Silvia; Sureda Anfres, Miquel (2020-08)
    Article
    Restricted access - publisher's policy
    Very low Earth orbits (VLEO), typically classified as orbits below approximately 450 km in altitude, have the potential to provide significant benefits to spacecraft over those that operate in higher altitude orbits. This ...
  • RF Helicon-based Inductive Plasma Thruster (IPT) Design for an Atmosphere-Breathing Electric Propulsion System (ABEP) 

    Romano, Francesco; Chan, Y. A.; Herdrich, Georg; García-Almiñana, Daniel; Rodríguez Donaire, Silvia; Sureda Anfres, Miquel (2020-11)
    Article
    Restricted access - publisher's policy
    Challenging space missions include those at very low altitudes, where the atmosphere is source of aerodynamicdrag on the spacecraft. To extend such missions lifetime, an efficient propulsion system is required. Onesolution ...
  • Translationally invariant metamirrors for spatial filtering of light beams 

    Wang, Pei-Yu; Herrero Simon, Ramon; Botey Cumella, Muriel; Cheng, Yu-Chiech; Staliunas, Kestutis (American Physical Society (APS), 2020-07-01)
    Article
    Open Access
    We propose a translationally invariant metamirror for light filtering in reflection. The device consists of athin transverse grating in the micron scale positioned in front of a flat mirror. We analyze the performance ...
  • The dynamics of digits: calculating Pi with Galperin's billiards 

    Aretxabaleta, Xabier M.; Gonchenko, Marina; Harshman, Nathan L.; Jackson, Steven Glenn; Olshanii, Maxim; Astrakharchik, Grigori (Multidisciplinary Digital Publishing Institute (MDPI), 2020-04-01)
    Article
    Open Access
    In Galperin billiards, two balls colliding with a hard wall form an analog calculator for the digits of the number p . This classical, one-dimensional three-body system (counting the hard wall) calculates the digits of p ...
  • Analysis and prediction of COVID-19 for EU-EFTA-UK and other countries 

    Català Sabaté, Martí; Cardona Iglesias, Pere Joan; Prats Soler, Clara; Alonso Muñoz, Sergio; Álvarez Lacalle, Enrique; Marchena Angos, Miquel; Conesa, David; López Codina, Daniel (2020-10-16)
    External research report
    Open Access
    The present report aims to provide a comprehensive picture of the pandemic situation of COVID-19 in the EU countries, and to be able to foresee the situation in the next coming days. We provide some figures and tables ...
  • Archaeomagnetic study of a limekiln in the Les Ferreres Roman aqueduct, World Heritage Site of Tarraco 

    Casas, Lluís; Auguet Sangrá, Carlota E.; Guasch Ferré, Núria; Gómez Paccard, Miriam; Pitarch Martí, África; Prada Pérez, José Luís; Sanjurjo-Sánchez, Jorge; Menchón Bes, Joan; Badia Cortada, Marta; Díaz García, Moisés (2020-08-16)
    Article
    Restricted access - publisher's policy
    The aqueduct of Les Ferreres is a major element of the Archaeological Ensemble of Tarraco. Although the ashlars of the aqueduct are stacked without mortar, lime was used in some parts and lime was certainly used in later ...
  • Design and development of a hyper-thermal atomic oxygen wind tunnel facility 

    Oiko, Vitor; Roberts, Peter C.E; Edmonson, Steve; García-Almiñana, Daniel; Rodríguez Donaire, Silvia; Sureda Anfres, Miquel (Centre National d'Études Spatiales (CNES), 2018)
    Conference lecture
    Restricted access - publisher's policy
    A hyper-thermal orbital aerodynamics test facility is described. The Rarefied Orbital Aerodynamics Research facility(ROAR)is a dedicated apparatus designedto simulate the atmospheric flow in very low Earth orbits(VLEO) to ...
  • Attitude control for satellites flying in VLEO using aerodynamic surfaces 

    Cañas Muñoz, Valentin; González, David; Becedas, Jonathan; Rodríguez Donaire, Silvia; García-Almiñana, Daniel; Sureda Anfres, Miquel; Nieto, Miriam; Muñoz, Candia (British Interplanetary Society, 2020)
    Article
    Restricted access - publisher's policy
    This 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 ...
  • Inductive Plasma Thruster (IPT) for an Atmosphere-Breathing Electric Propulsion System: design and set in operation 

    Romano, Francesco; Herdrich, Georg; Roberts, Peter C.E; García-Almiñana, Daniel; Rodríguez Donaire, Silvia; Sureda Anfres, Miquel (2019)
    Conference report
    Restricted access - publisher's policy
    Challenging space missions include those at very low orbits, where the atmosphere is source of significant drag on a satellite. Therefore, an efficient dragcompensation propulsion system is required to extend the mission ...

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