Now showing items 1-14 of 14

    • A linear scale height Chapman model supported by GNSS occultation measurements 

      Olivares Pulido, Germán; Hernández Pajares, Manuel; Aragón Ángel, Maria Angeles; García Rigo, Alberto (2016-05)
      Conference lecture
      Open Access
      Global Navigation Satellite Systems (GNSS) radio occultations allow the vertical sounding of the Earth's atmosphere, in particular, the ionosphere. The physical observables estimated with this technique permit to test ...
    • A New way of estimating the spatial and temporal components of the vertical total electron content gradient based on UPC-IonSAT global ionosphere maps 

      Liu, Qi; Hernández Pajares, Manuel; Yang, Heng; Monte Moreno, Enrique; García Rigo, Alberto; Lyu, Haixia; Olivares Pulido, Germán; Orús Pérez, Raul (2022-02)
      Article
      Open Access
      The determination of the ionospheric perturbation degree is essential to describe the ionosphere state for space weather monitoring. A new method for estimating the spatial and temporal components of the Vertical Total ...
    • 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, Germán (2017-03)
      Article
      Open Access
      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 ...
    • 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, Germán; Aragón Ángel, Maria Angeles; García Rigo, Alberto (2017-08)
      Article
      Open Access
      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 ...
    • GPS as a solar observational instrument: real-time estimation of EUV photons flux rate during strong, medium, and weak solar flares 

      Singh, Talwinder; Hernández Pajares, Manuel; Monte Moreno, Enrique; García Rigo, Alberto; Olivares Pulido, Germán (2015-12-15)
      Article
      Open Access
      In this manuscript, the authors show how the Global Navigation Satellite Systems, GNSS (exemplified in the Global Positioning System, GPS), can be efficiently used for a very different purpose from that for which it was ...
    • Improved MSTID modelling and impact on precise GNSS processing 

      Hernández Pajares, Manuel; Wielgosz, Pawel; Paziewski, Jacek; Krypiak-Gregorczyk, Anna; Stepniak, Katarzyna; Bosy, Jaroslaw; Kaplon, Jan; Hadas, Tomasz; Orús Pérez, Raul; Monte Moreno, Enrique; Yang, Heng; Olivares Pulido, Germán; García Rigo, Alberto (2015)
      Conference lecture
      Restricted access - publisher's policy
    • Ionospheric storm scale index based on high time resolution UPC-IonSAT global ionospheric maps (IsUG) 

      Liu, Qi; Hernández Pajares, Manuel; Lyu, Haixia; Nishioka, Michi; Yang, Heng; Monte Moreno, Enrique; Gulyaeva, Tamara L.; Beniguel, Yannick; Wilken, Volker; Olivares Pulido, Germán; Orús Pérez, Raul (2021-11)
      Article
      Open Access
      The ionospheric storms have adverse effects on the radio communications, satellite communications and also the Global Navigation Satellite Systems (GNSS) application. A new Ionospheric storm Scale from Universitat Politècnica ...
    • Ionospheric tomographic common clock model of undifferenced uncombined GNSS measurements 

      Olivares Pulido, Germán; Hernández Pajares, Manuel; Lyu, Haixia; Gu, Shengfeng; García Rigo, Alberto; Graffigna, Victoria; Tomaszewski, Dariusz; Wielgosz, Pawel; Rapinski, Jacek; Krypiak-Gregorczyk, Anna; Kazmierczak, Rafal; Orús Pérez, Raul (2021-10-13)
      Article
      Open Access
      In this manuscript, we introduce the Ionospheric Tomographic Common Clock (ITCC) model of undifferenced uncombined GNSS measurements. It is intended for improving the Wide Area precise positioning in a consistent and simple ...
    • IPRESES. Additional Technical Note #8: Virtual Box and Ciraolo SW (v1.0) 

      García Rigo, Alberto; Hernández Pajares, Manuel; Olivares Pulido, Germán (2015-04-22)
      Research report
      Restricted access - confidentiality agreement
    • IPRESES: TN4 

      Hernández Pajares, Manuel; García Rigo, Alberto; Olivares Pulido, Germán (2014-12-14)
      Research report
      Restricted access - confidentiality agreement
    • IPRESES: TN7 

      Hernández Pajares, Manuel; García Rigo, Alberto; Olivares Pulido, Germán (2014-12-02)
      Research report
      Restricted access - confidentiality agreement
    • Sibsonian and non-Sibsonian natural neighbour interpolation of the total electron content value 

      Kotulak, Kacper; Fron, Adam; Krankowski, Andrzej; Olivares Pulido, Germán; Hernández Pajares, Manuel (2017-03)
      Article
      Open Access
      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), ...
    • Systematic detection of anomalous ionospheric perturbations above LEOs from GNSS POD Data including possible tsunami signatures 

      Yang, Heng; Hernández Pajares, Manuel; Jarmolowski, Wojciech; Wielgosz, Pawel; Vadas, Sharon L.; Colombo, Oscar L.; Monte Moreno, Enrique; García Rigo, Alberto; Graffigna, Victoria; Krypiak-Gregorczyk, Anna; Milanowska, Beata; Bofill Soliguer, Pablo; Olivares Pulido, Germán; Liu, Qi; Haagmans, Roger (Institute of Electrical and Electronics Engineers (IEEE), 2022-06-13)
      Article
      Open Access
      In this article, we show the capability of a global navigation satellite system (GNSS) precise orbit determination (POD) low Earth orbit (LEO) data to detect anomalous ionospheric disturbances in the spectral range of the ...
    • Towards an optimal overall description of electron density information gathered during GNSS satellite occultations 

      Olivares Pulido, Germán; Hernández Pajares, Manuel; Limberger, Marco; García Rigo, Alberto; Aragón-Angel, Angela; Schmidt, Michael; Hugentobler, U (2014)
      Conference lecture
      Restricted access - publisher's policy
      The purpose of this work is to characterize the performance of different interpolation methods in order to build a global model of ionospheric free electron density, directly derived from the inversions of GNSS occultation ...