Visualitzant Recerca per matèria "537"

Ara mostrant els elements 1-9 de 9

    • A new approach to the hourly mean computation problem when dealing with missing data 

      Marsal Vinadé, Santiago; Curto, J. J. (Earth Planet Sp (2009) 61: 945, 2009-10-19)
      Geomagnetic observatory records are unavoidably affected by primary data interruptions which, in turn, may have possible effects on the accuracy of the definitive data derived from them. One of the ...

    • Analysis of the Ordinary and Extraordinary Ionospheric Modes for NVIS Digital Communications Channels 

      Malé Carbonell, Jordi; Porte Jiménez, Joaquim; González Fontán, Tomás; Masó Llinàs, Josep Maria; Pijoan Vidal, Joan Lluís; Badia Folguera, David (Sensors, 2021, 21 (6), 2021-03)
      Sensor networks have become more popular in recent years, now featuring plenty of optionsand capabilities. Notwithstanding this, remote locations present many difficulties for their studyand monitoring. ...

    • Conductivities consistent with Birkeland currents in the AMPERE-driven TIE-GCM 

      Marsal Vinadé, Santiago (Marsal,S.(2015),Conductivities consistent with Birkeland currents in the AMPERE-driven TIE-GCM, J. Geophys. Res. Space Physics, 120, 8045–8065, doi:10.1002/ 2015JA021385., 2015-09-26)
      The Active Magnetosphere and Planetary Electrodynamics Response Experiment (AMPERE) satellite mission has offered for the first time global snapshots of the geomagnetic field-aligned currents with ...

    • Interannual Variation of a 12,760 km Transequatorial Ionospheric Channel Availability and Its Dependence on Ionization 

      Orga Vidal, Ferran; Altadill Felip, David; Hervás García, Marcos; Alsina Pagès, Rosa Maria (1st International Electronic Conference on Atmospheric Sciences, 2016-07-15)
      The ionosphere provides a channel able for long-haul and Non-Line-Of-Sight (NLOS) communications. Nonetheless, the amount of ionization depends on the Sun activity, whose diurnal and seasonal cycles ...

    • Ionospheric Narrowband and Wideband HF Soundings for Communications Purposes: A Review 

      Hervás García, Marcos; Bergadà Caramés, Pau; Alsina Pagès, Rosa Maria (Sensors, 2020, Vol. 20 No 9, 2020-04)
      High Frequency (HF) communications through ionospheric reflection is a widely usedtechnique specifically for maritime, aeronautical, and emergency services communication withremote areas due ...

    • NVIS Multicarrier Modulations for Remote-Sensor Applications 

      Masó Llinàs, Josep M.; Gonzalez Fontan, Tomas; Malé Carbonell, Jordi; Porté Jiménez, Joaquim; Pijoan Vidal, Joan Lluís; Badia Folguera, David (Sensors, 2020, Vol. 20, No. 21, 2020-10)
      The number of Internet of Things (IoT) devices has experienced a large growth during the last decade, as well as the data volume gathered from remote sensors. Satellites are still a suitable communication ...

    • Sensing System for Remote Areas in Antarctica 

      Porté Jiménez, Joaquim; Masó Llinàs, Josep M.; Pijoan Vidal, Joan Lluís; Badia Folguera, David (Radio Science, 2020, Vol.55 No 3, 2020-02)
      Every year, the number of Internet of Things devices is growing exponentially. The current Internet of Things technology to support the connectivity of such a huge number of devices is limited by the ...

    • Study of NVIS Channel for USN Protocol Definition in Antarctica 

      Masó Llinàs, Josep M.; Porté Jiménez, Joaquim; Pijoan Vidal, Joan Lluís; Badia Folguera, David (Electronics, 2020, Vol. 9, No. 6, 2020-06)
      Every year, the number of ubiquitous sensor networks (USN) is increasing and the need for remote USN communications is emerging in some scenarios. As an alternative to satellite communications, more ...

    • Variation of Ionospheric Narrowband and Wideband Performance for a 12,760 km Transequatorial Link and Its Dependence on Solar and Ionospheric Activity 

      Alsina Pagès, Rosa Maria; Altadill Felip, David; Hervás García, Marcos; Blanch Llosa, Estefania; Segarra, Antoni; González Sans, Xavier (Remote Sensing, 2020, Vol.12 no 17, 2020-08)
      The ionosphere provides a channel that is able to propagate electromagnetic waves for long-haul communications, allowing Non-Line-Of-Sight (NLOS) radio communications in the high-frequency band (HF). ...