Enviaments recents

  • TEC forecasting based on manifold trajectories 

    Monte Moreno, Enrique; García Rigo, Alberto; Hernández Pajares, Manuel; Yang, Heng (Multidisciplinary Digital Publishing Institute (MDPI), 2018-06-22)
    Article
    Accés obert
    In this paper, we present a method for forecasting the ionospheric Total Electron Content (TEC) distribution from the International GNSS Service’s Global Ionospheric Maps. The forecasting system gives an estimation of the ...
  • GNSS transpolar earth reflectometry exploriNg system (G-TERN): mission concept 

    Cardellach Galí, Estel; Wickert, Jens; Baggen, Rens; Camps Carmona, Adriano José; Hernández Pajares, Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2018-03-09)
    Article
    Accés obert
    The global navigation satellite system (GNSS) Transpolar Earth Reflectometry exploriNg system (G-TERN) was proposed in response to ESA's Earth Explorer 9 revised call by a team of 33 multi-disciplinary scientists. The ...
  • Midlatitude postsunset plasma bubbles observed over Europe during intense storms in April 2000 and 2001 

    Katamzi Joseph, Zama Thobeka; Habarulema, John Bosco; Hernández Pajares, Manuel (2017-09)
    Article
    Accés obert
    Plasma bubbles are prevalent features of the equatorial/low-latitude ionosphere which are seldom observed at middle and high latitudes. Understanding the influence of geomagnetic storms on plasma bubbles' migration to ...
  • Electron density extrapolation above F2 peak by the linear Vary-Chap model supporting new Global Navigation Satellite Systems-LEO occultation missions 

    Hernández Pajares, Manuel; García Fernández, Miquel; Rius Carrasco, Antoni; Notarpietro, Riccardo; von Engeln, Axel; Olivares Pulido, German; Aragón Ángel, Maria Angeles; García Rigo, Alberto (2017-08)
    Article
    Accés obert
    The new radio-occultation (RO) instrument on board the future EUMETSAT Polar System-Second Generation (EPS-SG) satellites, flying at a height of 820 km, is primarily focusing on neutral atmospheric profiling. It will also ...
  • Methodology and consistency of slant and vertical assessments for ionospheric electron content models 

    Hernández Pajares, Manuel; Roma Dollase, David; Krankowski, Andrzej; García Rigo, Alberto; Orús Pérez, Raul (2017-12)
    Article
    Accés restringit per política de l'editorial
    A summary of the main concepts on global ionospheric map(s) [hereinafter GIM(s)] of vertical total electron content (VTEC), with special emphasis on their assessment, is presented in this paper. It is based on the experience ...
  • Impact and implementation of higher-order ionospheric effects on precise GNSS applications 

    Hadas, Tomasz; Krypiak-Gregorczyk, Anna; Hernández Pajares, Manuel; Kaplon, Jan; Paziewski, Jacek; Wielgosz, Pawel; García Rigo, Alberto; Kazmierski, K.; Sosnica, Krzysztof; Kwasniak, D.; Sierny, J.; Bosy, Jaroslaw; Pucilowski, Marcin; Szyszko, Robert; Portasiak, Krystian; Olivares, German; Gulyaeva, Tamara L.; Orús Pérez, Raul (2017-11)
    Article
    Accés restringit per política de l'editorial
    High precision Global Navigation Satellite Systems (GNSS) positioning and time transfer require correcting signal delays, in particular higher-order ionospheric (I2+) terms. We present a consolidated model to correct second- ...
  • Feasibility of GNSS-R ice sheet altimetry in Greenland using TDS-1 

    Rius, Antonio; Cardellach, Estel; Fabra, Fran; Li, Weiqiang; Ribó Vedrilla, Serni; Hernández Pajares, Manuel (2017-07-19)
    Article
    Accés obert
    Radar altimetry provides valuable measurements to characterize the state and the evolution of the ice sheet cover of Antartica and Greenland. Global Navigation Satellite System Reflectometry (GNSS-R) has the potential to ...
  • Multi-TID detection and characterization in a dense Global Navigation Satellite System receiver network 

    Yang, Heng; Monte Moreno, Enrique; Hernández Pajares, Manuel (2017-09-01)
    Article
    Accés restringit per política de l'editorial
    The medium-scale traveling ionospheric disturbances (MSTIDs) constitute the most frequent ionospheric wave signatures. We propose a method for detecting the number of simultaneous MSTIDs from a time series of high-pass-filtered ...
  • Sibsonian and non-Sibsonian natural neighbour interpolation of the total electron content value 

    Kotulak, Kacper; Fron, Adam; Krankowski, Andrzej; Olivares Pulido, German; Hernández Pajares, Manuel (2017-03)
    Article
    Accés obert
    In radioastronomy the interferometric measurement between radiotelescopes located relatively close to each other helps removing ionospheric effects. Unfortunately, in case of networks such as LOw Frequency ARray (LOFAR), ...
  • Direct MSTID mitigation in precise GPS processing 

    Hernández Pajares, Manuel; Wielgosz, Pawel; Paziewski, Jacek; Krypiak-Gregorczyk, Anna; Krukowska, Marta; Stepniak, Katarzyna; Kaplon, Jan; Hadas, Tomasz; Sosnica, Krzysztof; Bosy, Jaroslaw; Orús Pérez, Raul; Monte Moreno, Enrique; Yang, Heng; García Rigo, Alberto; Olivares Pulido, German (2017-03)
    Article
    Accés obert
    In this paper, the authors summarize a simple and efficient approach developed to mitigate the problem in precise GNSS positioning originated by the most frequent ionospheric wave signatures: the Medium Scale Travelling ...
  • Consistency of seven different GNSS global ionospheric mapping techniques during one solar cycle 

    Roma Dollase, David; Hernández Pajares, Manuel; Krankowski, Andrzej; Kotulak, Kacper; Ghoddousi Fard, Reza; Yuan, Yunbin; Li, Zishen; Zhang, Hongping; Shi, Chuang; Wang, Cheng; Feltens, Joachim; Vergados, Panagiotis; Komjathy, Attila; Schaer, Stefan C.; García Rigo, Alberto; Gómez Cama, José Mª (2017-11-28)
    Article
    Accés obert
    In the context of the International GNSS Service (IGS), several IGS Ionosphere Associated Analysis Centers have developed different techniques to provide global ionospheric maps (GIMs) of vertical total electron content ...
  • Temporal and spatial variations of global ionospheric total electron content under various solar conditions 

    Liu, Jingbin; Hernández Pajares, Manuel; Liang, Xinlian; An, Jiachun; Wang, Zemin; Chen, Ruizhi; Sun, Wei; Hyyppä, Juha (2016-12-09)
    Article
    Accés obert
    By utilizing the numerical technique of principal component analysis (PCA), this work analyses temporal and spatial variations of the ionosphere under various solar conditions during the period 1999–2013. Applying the PCA ...

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