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Inter-system biases solution strategies in multi-GNSS kinematic precise point positioning
(2023-07)
Article
Open AccessEstimating inter-system biases (ISBs) is important in multi-constellation Global Navigation Satellite System (GNSS) processing. The present study aims to evaluate and screen out an optimal estimation strategy of ISB for ... -
Neural network based model for global Total Electron Content forecasting
(EDP Sciences, 2020-03)
Article
Open AccessWe introduce a novel empirical model to forecast, 24 h in advance, the Total Electron Content (TEC) at global scale. The technique leverages on the Global Ionospheric Map (GIM), provided by the International GNSS Service ... -
Comparison of GPS analysis strategies for high-accuracy vertical land motion
(2008-01)
Article
Open AccessTide 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 ... -
The ionosphere prediction service prototype for GNSS users
(EDP Sciences, 2019)
Article
Open AccessThe effect of the Earth’s ionosphere represents the single largest contribution to the Global Navigation Satellite System (GNSS) error budget and abnormal ionospheric conditions can impose serious degradation on GNSS system ... -
WIDE AREA Real Time Kinematics (WARTK): nuevas posibilidades de posicionamiento y navegación GNSS precisa a escala continental
(2008-05-05)
Article
Open AccessEn 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
Restricted access - publisher's policyMonitoring 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
Open AccessRecently, 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
Open AccessSeveral 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
Restricted access - publisher's policyGlobal 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
Open AccessIn 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 ... -
Network-based ionospheric gradient monitoring to support GBAS
(2021-02-11)
Article
Open AccessLarge 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
Open AccessWith 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 ...