Browsing by Author "Orús Pérez, Raul"

Now showing items 1-20 of 36

    • 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 ...

    • A new way of improving global ionospheric maps by ionospheric tomography: consistent combination of multi-GNSS and multi-space geodetic dual-frequency measurements gathered from vessel-, LEO- and ground-based receivers 

      Hernández Pajares, Manuel; Lyu, Haixia; García Fernández, Miquel; Orús Pérez, Raul (2020-08)
      Article
      Restricted access - publisher's policy
      In this work, we introduce a new way of improving the sligthly best performing global ionospheric model (GIM) within the International GNSS Service, the UQRG produced by UPC-IonSAT with the TOMION dual-layer voxel model ...

    • AATR an ionospheric activity indicator specifically based on GNSS measurements 

      Juan Zornoza, José Miguel; Sanz Subirana, Jaume; Rovira Garcia, Adrià; González Casado, Guillermo; Ibáñez Segura, Deimos; Orús Pérez, Raul (2018-03-01)
      Article
      Open Access
      This work reviews an ionospheric activity indicator useful for identifying disturbed periods affecting the performance of Global Navigation Satellite System (GNSS). This index is based in the Along Arc TEC Rate (AATR) and ...

    • Applying the geodetic detrending technique for investigating the consistency of GPS L2P(Y) in several receivers 

      Juan Zornoza, José Miguel; Sanz Subirana, Jaume; González Casado, Guillermo; Rovira Garcia, Adrià; Timoté Bejarano, Cristhian Camilo; Orús Pérez, Raul (2022-11)
      Article
      Open Access
      Global Navigation Satellite System signals have been used for years to study high-frequency fluctuations (f>0.1Hz)intheionosphere. The customary procedure uses the geometry-free (GF) combination ofL1andL2carriers, for which ...

    • Assessing the quality of ionospheric models through GNSS positioning error: methodology and results 

      Rovira Garcia, Adrià; Ibáñez Segura, Deimos; Orús Pérez, Raul; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; González Casado, Guillermo (2020-01-01)
      Article
      Open Access
      Single-frequency users of the global navigation satellite system (GNSS) must correct for the ionospheric delay. These corrections are available from global ionospheric models (GIMs). Therefore, the accuracy of the GIM is ...

    • Assessment of centre national d'Études spatiales real-time ionosphere maps in instantaneous precise real-time kinematic positioning over medium and long baselines 

      Tomaszewski, Dariusz; Wielgosz, Pawel; Rapinski, Jacek; Krypiak-Gregorczyk, Anna; Kazmierczak, Rafal; Hernández Pajares, Manuel; Yang, Heng; Orús Pérez, Raul (Multidisciplinary Digital Publishing Institute (MDPI), 2020-04-17)
      Article
      Open Access
      Precise real-time kinematic (RTK) Global Navigation Satellite System (GNSS) positioning requires fixing integer ambiguities after a short initialization time. Originally, it was assumed that it was only possible at a ...

    • Assessment of St. Patrick's Day 2015 Geomagnetic storm impact on EGNOS 

      Hernández Pajares, Manuel; Béniguel, Yannick; Orús Pérez, Raul; Prieto Cerdeira, Roberto; García Rigo, Alberto; Kinrade, J; Kauristie, Kirsti; Schlueter, Stefan; Serant, Damien; Krankowski, Andrzej; Secretan, Hugues; Sampedro Casis, Rodrigo; Prats Menéndez, Xavier (European Space Agency (ESA), 2015)
      Conference lecture
      Restricted access - publisher's policy
      The Monitor project has been designed to monitor ionospheric events that would allow evaluating its impact on European GNSS Systems. It includes a network of ionospheric scintillation monitoring stations in various ...

    • Characterization and modelling of the ionosphere for EGNOS development and qualification 

      Schlüter, S.; Prieto Cerdeira, Roberto; Orús Pérez, Raul; Lam, J.P.; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; Hernández Pajares, Manuel (2013)
      Conference lecture
      Restricted access - publisher's policy
      The availability of representative data samples, models and statistical information derived from the analysis of parameters that adequately describe the state of the ionosphere are key elements for the design, verification ...

    • Climatology of High and Low Latitude Scintillation in the Last Solar Cycle by Means of the Geodetic Detrending Technique 

      Rovira Garcia, Adrià; González Casado, Guillermo; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; Orús Pérez, Raul (ION Publications (The Institute of navigation), 2020)
      Conference report
      Restricted access - publisher's policy
      Signals from a Global Navigation Satellite System (GNSS) can be disturbed along the propagation ray path from the satellites to the receivers. The presence of irregularities in the electron density in the near-Earth space ...

    • Comparing performances of seven different global VTEC ionospheric models in the IGS context 

      Hernández Pajares, Manuel; Roma Dollase, David; Krankowski, Andrzej; García Rigo, Alberto; Orús Pérez, Raul (International GNSS Service (IGS), 2016)
      Conference report
      Restricted access - publisher's policy
      A summary of the main concepts on Global Ionospheric Map(s) (hereinafter GIM(s)) of Vertical Electron Content (VTEC), with special emphasis on their assessment, is presented in this paper. It is based on the experience ...

    • Comparison of GPS analysis strategies for high-accuracy vertical land motion 

      Kierulf, H P; Plag, H P; Bingley, R M; Teferle, N; Demir, C; Cingoz, A; Yildiz, H; Zdunek, R; Jaworski, L; Martínez Benjamín, Juan José; Orús Pérez, Raul; Aragón Ángel, María Ángeles (2008-01)
      Article
      Open Access
      Tide gauges measure sea level changes relative to land. To separate absolute changes in sea level from vertical land movements tide gauges are often co-located with Continuous GPS (CGPS). In order to achieve an accuracy ...

    • 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 ...

    • Feasibility of precise navigation in high and low latitude regions under scintillation conditions 

      Juan Zornoza, José Miguel; Sanz Subirana, Jaume; González Casado, Guillermo; Rovira Garcia, Adrià; Camps Carmona, Adriano José; Riba Sagarra, Jaume; Barbosa, José; Blanch Llosa, Estefania; Altadill, David; Orús Pérez, Raul (2018-02-06)
      Article
      Open Access
      Scintillation is one of the most challenging problems in Global Navigation Satellite Systems (GNSS) navigation. This phenomenon appears when the radio signal passes through ionospheric irregularities. These irregularities ...

    • GNSS solar astronomy in real-time during more than one solar cycle 

      Hernández Pajares, Manuel; García Rigo, Alberto; Monte Moreno, Enrique; Liu, Qi; Roma Dollase, David; Yang, Heng; Beniguel, Yannick; Moreno Borrás, David; Fors Aldrich, Octavi; Lyu, Haixia; Orús Pérez, Raul; Ventura Traveset, Javier (Elsevier, 2023-12-09)
      Article
      Open Access
      This work presents a summary of the continuous non-stop (hereinafter 24/7) real-time measurement and warning system for EUV solar activity, which is based on worldwide multifrequency Global Navigation Satellite Systems ...

    • 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
      Open Access
      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- ...

    • Improved characterization and modeling of equatorial plasma depletions 

      Blanch Llosa, Estefania; Altadill, David; Juan Zornoza, José Miguel; Camps Carmona, Adriano José; Barbosa, José; González Casado, Guillermo; Riba Sagarra, Jaume; Sanz Subirana, Jaume; Vázquez Grau, Gregorio; Orús Pérez, Raul (2018-08-22)
      Article
      Open Access
      This manuscript presents a method to identify the occurrence of Equatorial Plasma Bubbles (EPBs) with data gathered from receivers of Global Navigation Satellite System (GNSS). This method adapts a previously existing ...

    • 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

    • Improvement of global ionospheric VTEC maps by using kriging interpolation technique 

      Orús Pérez, Raul; Hernández Pajares, Manuel; Juan Zornoza, José Miguel; Sanz Subirana, Jaume (2005-07-07)
      Article
      Open Access
      In this work, a geostatistic interpolation algorithm, called kriging, has been applied to improve the Technical University of Catalonia (UPC) global ionospheric maps (GIMs) computed with GPS data. This new UPC GIM, from ...

    • Ionospheric corrections tailored to the Galileo High Accuracy Service 

      Rovira Garcia, Adrià; Timoté Bejarano, Cristhian Camilo; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; González Casado, Guillermo; Fernandez Hernandez, Ignacio; Orús Pérez, Raul; Blonski, Daniel (2021-12)
      Article
      Open Access
      The Galileo High Accuracy Service (HAS) is a new capability of the European Global Navigation Satellite System that is currently under development. The Galileo HAS will start providing satellite orbit and clock corrections ...

    • Ionospheric scintillation models: An inter-comparison study using GNSS data 

      Camps Carmona, Adriano José; Molina Ordóñez, Carlos; González Casado, Guillermo; Juan Zornoza, José Miguel; Lemorton, Joël; Fabbro, Vincent; Mainvis, Aymeric; Barbosa, José; Orús Pérez, Raul (IntechOpen, 2023-06-21)
      Part of book or chapter of book
      Open Access
      Existing climatological ionosphere models, for example, GISM, SCIONAV, WBMOD, and STIPEE, have known limitations that prevent their wide use. In the framework of ESA study “Radio Climatology Models of the Ionosphere: Status ...