Now showing items 1-12 of 1213

    • The flexible microwave payload -2: design, implementation, and optimization of a GNSS-R and radiometry processor for cubesat-based earth observation missions 

      Muñoz Martin, Joan Francesc; Fernandez Capon, Lara Pilar; Ruiz De Azúa Ortega, Juan Adrián; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Conference report
      Restricted access - publisher's policy
      The Flexible Microwave Payload 2 (FMPL-2) is a Remote Sensing payload carried on board 3 Cat-5/A, one of the two 6-unit CubeSats of the FSSCat mission. FMPL-2 is a payload based on a Software Defined Radio (SDR), integrating ...
    • Precise orbit observation techniques for geosynchronous synthetic aperture radar (GEOSAR) 

      Nicolás Álvarez, Jorge; Broquetas Ibars, Antoni; Aguasca Solé, Alberto (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Conference report
      Restricted access - publisher's policy
      The orbit accuracy requirements for a Geosynchronous Synthetic Aperture Radar (GEOSAR) are studied. Compared to telecommunication GEO satellites' station keeping needs, focusing the GEOSAR synthetic aperture demands a more ...
    • Refining the methodology to correct the faraday rotation angle from SMOS measurements 

      Rubino, Roselena; Duffo Ubeda, Núria; González Gambau, Verónica; Corbella Sanahuja, Ignasi; Durán Martínez, Israel; Torres Torres, Francisco; Martín Neira, Manuel
      Conference report
      Restricted access - publisher's policy
      In this work, a refined methodology to correct the Faraday Rotation angle (FRA) for the SMOS mission is proposed. The method is based on calculating the FRA using the SMOS full-pol radiometric data to obtain VTEC maps ...
    • In-orbit validation of the fmpl-2 instrument—the gnss-r and l-band microwave radiometer payload of the fsscat mission 

      Muñoz Martin, Joan Francesc; Fernandez Capon, Lara Pilar; Pérez Portero, Adrián; Ruiz De Azúa Ortega, Juan Adrián; Hyuk, Park; Camps Carmona, Adriano José; Carnicero Domínguez, Bernardo; Pastena, Massimiliano (Multidisciplinary Digital Publishing Institute (MDPI), 2021-01-01)
      Article
      Open Access
      The Flexible Microwave Payload-2 is the GNSS-R and L-band Microwave Radiometer Payload on board 3Cat-5/A, one of the two 6-unit CubeSats of the FSSCat mission, which were successfully launched on 3 September 2020 on Vega ...
    • Ionospheric scintillation model limitations and impact in GNSS-R missions 

      Camps Carmona, Adriano José; González Casado, Guillermo; Juan Zornoza, José Miguel; Hyuk, Park; Barbosa, José (Institute of Electrical and Electronics Engineers (IEEE), 2020)
      Conference report
      Open Access
      The ionosphere impacts radio-wave propagation, notably up to a few GHz. The main applications impacted by the ionosphere are GNSS positioning and timing, Earth Observations (especially low frequency SAR missions e.g. ...
    • Interferometry based orbit observation for geosynchronous synthetic aperture radar (GEOSAR) missions 

      Nicolás Álvarez, Jorge; Carreño Megias, Xavier; Fusté i Lara, Oriol; Aguasca Solé, Alberto; Broquetas Ibars, Antoni (International Astronautical Federation, 2019)
      Conference report
      Restricted access - publisher's policy
      A major limitation of current Low Earth Orbit Synthetic Aperture Radars (LEOSAR) is related to their revisit time of several days or weeks. They cannot provide continuous monitoring over the same area of the planet. The ...
    • A multi-frequency SDR-based GBSAR: System overview and first results 

      Amézaga Sarries, Adrià; López Martínez, Carlos; Jové Casulleras, Roger (Multidisciplinary Digital Publishing Institute (MDPI), 2021-04-21)
      Article
      Open Access
      This work describes a system-level overview of a multi-frequency GBSAR built around a high performance software defined radio (SDR). The main goal of the instrument is to be employed as a demonstrator and experimental ...
    • Detection of volcanic unrest onset in La Palma, Canary Islands, evolution and implications 

      Escayo Menéndez, Joaquín; Hu, Zhongbo; Mallorquí Franquet, Jordi Joan (Nature, 2021-12-01)
      Article
      Open Access
      La Palma island is one of the highest potential risks in the volcanic archipelago of the Canaries and therefore it is important to carry out an in-depth study to define its state of unrest. This has been accomplished through ...
    • Synergetic observations by ground-based and space lidar systems and aeronet sun-radiometers: a step to advanced regional monitoring of large scale aerosol changes 

      Chaikovsky, Anatoli; Bril, Andrey; Dubovik, Oleg; Fedarenka, Anton; Goloub, Philippe; Hu, Qiaoyun; Lopatin, Anton; Rocadenbosch Burillo, Francisco; Rodríguez Gómez, Alejandro Antonio; Sicard, Michaël (EDP Sciences, 2020)
      Conference report
      Open Access
      The paper presents the preliminary results of the lidar&radiometer measurement campaign (LRMC-2017), estimation of statistical relations between aerosol mode concentrations retrieved from CALIOP and ground-based lidar ...
    • Direct, longwave radiative forcing of mineral dust: improvement of its estimation by means of tools recently developed by the EARLINET community 

      Sicard, Michaël; Muñoz Porcar, Constantino; Comerón Tejero, Adolfo; Rodríguez Gómez, Alejandro Antonio; Rocadenbosch Burillo, Francisco; Barragán Cuesta, Rubén (EDP Sciences, 2016)
      Conference report
      Open Access
      The objective of this work is to investigate how the knowledge of the vertically-resolved fine and coarse mode aerosol optical depth modifies the longwave radiative forcing. Since relatively little the EARLINET (European ...
    • Radio-frequency interference location, detection and classification using deep neural networks 

      Pérez Portero, Adrián; Querol Borràs, Jorge; Hyuk, Park; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2020)
      Conference report
      Open Access
      Global Navigation Satellite System (GNSS) signals are used in Earth Observation for Radio Occultation and Reflectometry. The increasing effects of Radio-Frequency Interferences (RFI) on the performance of these receivers ...
    • Snow and ice thickness retrievals using GNSS-R: Preliminary results of the mosaic experiment 

      Muñoz Martin, Joan Francesc; Pérez Portero, Adrián; Camps Carmona, Adriano José; Ribó Vedrilla, Serni; Cardellach Galí, Estel; Stroeve, Julienne; Nandan, Vishnu; Itkin, Polona; Tonboe, Rasmus; Hendricks, Stefan; Huntemann, Marcus; Spreen, Gunnar; Pastena, Massimiliano (Multidisciplinary Digital Publishing Institute (MDPI), 2020-12-02)
      Article
      Open Access
      The FSSCat mission was the 2017 ESA Sentinel Small Satellite (S^3) Challenge winner and the Copernicus Masters competition overall winner. It was successfully launched on 3 September 2020 onboard the VEGA SSMS PoC (VV16). ...