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  • Compact lidar system using laser diode, binary continuous wave power modulation, and an avalanche photodiode-based receiver controlled by a digital signal processor 

    Ardanuy Dellà, Antoni; Comerón Tejero, Adolfo (2018-04-18)
    Article
    Open Access
    We analyze the practical limits of a lidar system based on the use of a laser diode, random binary continuous wave power modulation, and an avalanche photodiode (APD)-based photereceiver, combined with the control and ...

  • Design and optimization of a polar satellite mission to complement the Copernicus System 

    Alarcón Cot, Eduardo José; Alvaro Sanchez, A.; Araguz López, Carles; Barrot, G.; Bou Balust, Elisenda; Camps Carmona, Adriano José; Cornara, Stefania; Gutiérrez Peña, Pedro Antonio; Lancheros Sepulveda, Estefany Maria; Lesne, O.; Llaveria Godoy, David; Lluch, I.; Males, Jan; Mangin, A.; Matevosyan, H.; Monge, A.; Narkiewicz, J.; Ourevitch, S.; Pierotti, S.; Pica, U.; Poghosyan, A.; Ruiz de Azúa Ortega, Joan Adrià (Institute of Electrical and Electronics Engineers (IEEE), 2018-06-05)
    Article
    Open Access
    The space industry is currently witnessing two concurrent trends: the increased modularity and miniaturization of technologies and the deployment of constellations of distributed satellite systems. As a consequence of the ...

  • Temporal analysis of laser beam propagation in the atmosphere using computer-generated long phase screens 

    Dios Otín, Víctor Federico; Recolons Martos, Jaume; Rodríguez Gómez, Alejandro Antonio; Batet Torrell, Óscar (2008-02-04)
    Article
    Open Access
    Temporal analysis of the irradiance at the detector plane is intended as the first step in the study of the mean fade time in a free optical communication system. In the present work this analysis has been performed for a ...

  • Separation of aerosol fine-and coarse-mode radiative properties: Effect on the mineral dust longwave, direct radiative forcing 

    Sicard, Michaël; Bertolín Martínez, Santiago; Muñoz Porcar, Constantino; Rodríguez Gómez, Alejandro Antonio; Rocadenbosch Burillo, Francisco; Comerón Tejero, Adolfo (2014-10-16)
    Article
    Open Access
    An improvement of the estimation of mineral dust longwave, direct radiative forcing is presented. It is based on recent developments that combine Sun photometer and multiwavelength lidar data to retrieve range-resolved ...

  • Considerations about the determination of the depolarization calibration profile of a two-telescope lidar and its implications for volume depolarization ratio retrieval 

    Comerón Tejero, Adolfo; Rodríguez Gómez, Alejandro Antonio; Sicard, Michaël; Barragán Cuesta, Rubén; Muñoz Porcar, Constantino; Rocadenbosch Burillo, Francisco; Granados Muñoz, María José (Multidisciplinary Digital Publishing Institute (MDPI), 2018-06-04)
    Article
    Open Access
    We propose a new method for calculating the volume depolarization ratio of light backscattered by the atmosphere and a lidar system that employs an auxiliary telescope to detect the depolarized component. It takes into ...

  • Internet of Satellites (IoSat): analysis of network models and routing protocol requirements 

    Ruiz de Azúa Ortega, Joan Adrià; Calveras Augé, Anna M.; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2018-04-06)
    Article
    Open Access
    The space segment has been evolved from monolithic to distributed satellite systems. One of these distributed systems is called the federated satellite system (FSS) which aims at establishing a win-win collaboration between ...

  • Track detection in railway sidings based on MEMS gyroscope sensors 

    Broquetas Ibars, Antoni; Comerón Tejero, Adolfo; Gelonch Bosch, Antonio José; Fuertes Armengol, José Mª; Castro Fernández, José Antonio; Felip, Damià; López Márquez, Miguel Ángel; Pulido, Jose Antonio (Multidisciplinary Digital Publishing Institute (MDPI), 2012-11-23)
    Article
    Open Access
    The paper presents a two-step technique for real-time track detection in single-track railway sidings using low-cost MEMS gyroscopes. The objective is to reliably know the path the train has taken in a switch, diverted or ...

  • Silicon photomultiplier detector for atmospheric lidar applications 

    Riu Gras, Jordi; Sicard, Michaël; Royo Royo, Santiago; Comerón Tejero, Adolfo (2012-04-01)
    Article
    Restricted access - publisher's policy
    The viability and performance of using a silicon photomultiplier (SiPM) in atmospheric lidar applications is experimentally compared against the well-established use of photomultiplier tubes. By using a modified lidar setup ...

  • Rf interference analysis in aperture synthesis interferometric radiometers: application to l-band miras instrument 

    Camps Carmona, Adriano José; Corbella Sanahuja, Ignasi; Torres, F; Bará, J; Capdevila Vives, Joan (Institute of Electrical and Electronics Engineers (IEEE), 2000-03)
    Article
    Open Access
    Current spaceborne radiometers do not achieve the required spatial resolution demanded by the scientific community due to antenna-size technological limitations. In recent years, several space agencies have been studying ...

  • The visibility function in interferometric aperture synthesis radiometry 

    Corbella Sanahuja, Ignasi; Duffo Ubeda, Núria; Vall-Llossera Ferran, Mercedes Magdalena; Camps Carmona, Adriano José; Torres Torres, Francisco (Institute of Electrical and Electronics Engineers (IEEE), 2004-08)
    Article
    Open Access
    The fundamental equation of interferometric aperture synthesis radiometry is revised to include full antenna pattern characterization and receivers' interaction. It is shown that the cross correlation between the output ...

  • L-Band sea surface emissivity: preliminary results of the WISE-2000 campaign and its application to salinity retrieval in the SMOS mission 

    Camps Carmona, Adriano José; Corbella Sanahuja, Ignasi; Vall-Llossera Ferran, Mercedes Magdalena; Duffo Ubeda, Núria; Torres Torres, Francisco; Villarino Villarino, Ramón; Enrique, L; Julbé, F; Font Capafons, Josep; Julià, A; Gabarró, C; Etcheto, J; Boutin, J; Weill, A; Caselles Costa, Vicent; Rubio, E; Wursteisen, P (2003-06)
    Article
    Open Access
    Soil moisture and ocean salinity at surface level can be measured by passive microwave remote sensing at L-band. To provide global coverage data of soil moisture and ocean salinity with three-day revisit time, the Earth ...

  • Sea surface emissivity observations at L-band: first results of the Wind and Salinity Experiment WISE 2000 

    Camps Carmona, Adriano José; Font Ferré, Jordi; Etcheto, J; Caselles Costa, Vicent; Weill, A; Corbella Sanahuja, Ignasi; Vall-Llossera Ferran, Mercedes Magdalena; Duffo Ubeda, Núria; Torres Torres, Francisco; Villarino Villarino, Ramón; Enrique, L; Julia, A; Gabarro, C; Boutin, J; Rubio, E; Reising, S; Wursteisen, P.; Berger, M.; Martín Neira, Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2002-10)
    Article
    Open Access
    Sea surface salinity can be measured by passive microwave remote sensing at L-band. In May 1999, the European Space Agency (ESA) selected the Soil Moisture and Ocean Salinity (SMOS) Earth Explorer Opportunity Mission to ...

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