gAGE - grup d'Astronomia i GEomàtica

 

Recerca i transferència de tecnologia en l’àmbit de la navegació molt precisa GNSS (GPS, GLONASS, GALILEO, SBAS) i de l’observació de la Terra (sondeig atmosfèric: ionosfera i troposfera). Modelització de processos i sistemes en l’àmbit de les ciències de la Terra, incloent–hi la biotecnologia.

Pàgina web del grup de recerca

Recent Submissions

  • On the global kinematic positioning variations during the September 2017 solar flare events 

    Nie, Wenfeng; Rovira Garcia, Adrià; Wang, Yong; Zheng, Dunyong; Yan, Lingfei; Xu, Tianhe (John Wiley & sons, 2022-08)
    Article
    Open Access
    Several X-class solar flares (SFs) with different intensities and locations on the solar disk occurred in September 2017. Among them, the X9.3 SF on 6 September 2017 was the most intensive SF in the 24th solar cycle. In ...

  • 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; Timote Bejarano, Cristhian Camilo; Orús Pérez, Raul (2022-11)
    Article
    Restricted access - publisher's policy
    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 ...

  • The Mechanism for GNSS-Based Kinematic Positioning Degradation at High-Latitudes Under the March 2015 Great Storm 

    Nie, Wenfeng; Rovira Garcia, Adrià; Li, Mowen; Fang, Zhenlong; Wang, Yong; Zheng, Dunyong; Xu, Tianhe (2022-06)
    Article
    Open Access
    In this study, we focus on the kinematic precise point positioning (PPP) solutions at high-latitudes during the March 2015 great geomagnetic storm. We aim to discover the mechanism behind the positioning degradation from ...

  • GPS and Galileo Wide Area RTK concepts 

    Hernández Pajares, Manuel; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; Garcia Rodriguez, Alberto (Institut de Geomàtica, 2005)
    Conference report
    Open Access

  • Preliminary NeQuick assessment for future single frequency users of GALILEO 

    Aragón Ángel, María Ángeles; Orús Pérez, Raül; Hernández Pajares, Manuel; Juan Zornoza, José Miguel; Sanz Subirana, Jaume (2005)
    Conference report
    Open Access
    The NeQuick model is the ionospheric mo del that will be used by the GALILEO single frequency user to compute ionospheric corrections. In this framework, the aim of this study is to show a preliminary assessment of the ...

  • Network-based ionospheric gradient monitoring to support GBAS 

    Caamaño Albuerne, María; Juan Zornoza, José Miguel; Felux, Michael; Gerbeth, Daniel; González Casado, Guillermo; Sanz Subirana, Jaume (2021-02-11)
    Article
    Open Access
    Large ionospheric gradients acting between a Ground Based Augmentation System (GBAS) reference station and an aircraft on approach could lead to hazardous position errors if undetected. Current GBAS stations provide solutions ...

  • Cloud-based single-frequency Snapshot RTK positioning 

    Liu, Xiao; Ribot, Miguel Ángel; Gusi Amigó, Adriá; Rovira Garcia, Adrià; Sanz Subirana, Jaume; Closas Gómez, Pau (Multidisciplinary Digital Publishing Institute (MDPI), 2021-05-26)
    Article
    Open Access
    With great potential for being applied to Internet of Things (IoT) applications, the concept of cloud-based Snapshot Real Time Kinematics (SRTK) was proposed and its feasibility under zero-baseline configuration was confirmed ...

  • Effect of the polar cap ionospheric sporadic-E layer on GNSS-based positioning: a case study at Resolute Bay, Canada, September 5, 2012 

    Nie, Wenfeng; Wang, Yong; Rovira Garcia, Adrià; Zheng, Dunyong; Xu, Tianhe (2022-04)
    Article
    Restricted access - publisher's policy
    We focus on the impacts of the polar cap ionospheric sporadic-E (Es) layer that occurred at Resolute Bay, Canada, on September 5, 2012, on the quality of the Global Positioning System (GPS) observable and the positioning ...

  • Application of tomographic ionospheric corrections in WADGPS networks for real-time estimation of integrated water vapour 

    Hernández Pajares, Manuel; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; Colombo, Oscar L.; Van der Marel, Hans (Instituto de Navegacion de España, 2021)
    Conference report
    Open Access
    In recent years several authors have developed strategies that estimate the Integrated Water Vapor (IWV), proportional to the Zenith Tropospheric Delay (ZTD), in near real time --i.e. with a delay of one hour or more--. ...

  • Long-baseline (> 400Km) on the fly ambiguity resolution using ionospheric corrections with high geomagnetic activity 

    Colombo, Oscar L.; Hernández Pajares, Manuel; Juan Zornoza, José Miguel; Sanz Subirana, Jaume (2001)
    Conference lecture
    Open Access
    A procedure for resolving carrier phase ambiguities, even under unfavorable geomagnetic conditions, has been tested. Precise ionospheric corrections have been made using dual-frequency data from control stations. Successful ...

  • A multi-frequency method to improve the long-term estimation of GNSS clock corrections and phase biases 

    Rovira Garcia, Adrià; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; González Casado, Guillermo; Ventura Traveset, Javier; Cacciapuoti, Luigi; Schoenemann, Erik (2021-12)
    Article
    Open Access
    The space segment of the Global Navigation Satellite System (GNSS) is equipped with highly stable atomic clocks. In order to use these clocks as references, their time offsets must be estimated from ground measurements as ...

  • Ionospheric corrections tailored to the Galileo High Accuracy Service 

    Rovira Garcia, Adrià; Timote 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 ...

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