gAGE - grup d'Astronomia i GEomàtica: Enviaments recents
Ara es mostren els items 13-24 de 207
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WIDE AREA Real Time Kinematics (WARTK): nuevas posibilidades de posicionamiento y navegación GNSS precisa a escala continental
(2008-05-05)
Article
Accés obertEn este artículo se presenta la nueva técnica Wide Area Real Time Kinematics (WARTK) que permite la extensión de técnicas previas de navegación precisa por satélite, como por ejemplo el Real Time Kinematics (RTK), más allá ... -
Enhanced neural network model for regional ionospheric modeling and evaluation under different solar-geomagnetic conditions
(2023-03-01)
Article
Accés obertMonitoring spatiotemporal variations of ionospheric vertical total electron content (VTEC) is crucial for space weather and satellite positioning. In the present study, an enhanced neural network (ENN) model is proposed ... -
A Method to determine secondary codes and carrier phases of short snapshot signals
(2022-12)
Article
Accés obertRecently, the Snapshot Real-Time Kinematic (SRTK) technique was demonstrated, which aims at achieving high accuracy navigation solutions with a very short signal collection. The main challenge in implementing SRTK is the ... -
On the global kinematic positioning variations during the September 2017 solar flare events
(John Wiley & sons, 2022-08)
Article
Accés obertSeveral 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
(2022-11)
Article
Accés obertGlobal 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
(2022-06)
Article
Accés obertIn 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
(Institut de Geomàtica, 2005)
Text en actes de congrés
Accés obert -
Preliminary NeQuick assessment for future single frequency users of GALILEO
(2005)
Text en actes de congrés
Accés obertThe 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
(2021-02-11)
Article
Accés obertLarge 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
(Multidisciplinary Digital Publishing Institute (MDPI), 2021-05-26)
Article
Accés obertWith 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
(2022-04)
Article
Accés obertWe 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
(Instituto de Navegacion de España, 2021)
Text en actes de congrés
Accés obertIn 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--. ...