Results 51 to 60 of about 102,104 (203)
SensorsThe Galileo satellite navigation system now provides initial services. With further satellite launches, the performance of Galileo will gradually improve, and new services will be introduced. This study aims to provide a comprehensive analysis of Galileo
Jiantao Zhang, Weiwei Li
doaj +1 more source
IEEE Access, 2020 Spoofing attacks pose a clear cybersecurity risk for all systems relying on Global Navigation Satellite Systems (GNSS) for time synchronization or positioning.
Francisco Gallardo, Antonio Perez Yuste
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Relativistic positioning: errors due to uncertainties in the satellite world lines [PDF]
Astrophys. Space Sci. (2014), 2014 Global navigation satellite systems use appropriate satellite constellations to get the coordinates of an user -close to Earth- in an almost inertial reference system. We have simulated both GPS and GALILEO constellations. Uncertainties in the satellite world lines lead to dominant positioning errors.
arxiv +1 more source
Tracking the position Global satellite navigations in Europe Expanding man's understanding ‘GALILEO: 2020!’ [PDF]
, 2020 Mankind has a thirst to travel and while travel into outer space is a relatively new concept, we increasingly rely, on Earth, on technologies deployed in space to aid our safety, security – including in a transport context, where we look for efficient ...
Fox, S., Fox, S.
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Formal Specification and Quantitative Analysis of a Constellation of Navigation Satellites [PDF]
, 2014 Navigation satellites are a core component of navigation satellite based systems such as GPS, GLONASS and Galileo which provide location and timing information for a variety of uses. Such satellites are designed for operating on orbit to perform tasks and have lifetimes of 10 years or more.
arxiv +1 more source
System engineering approach applied to Galileo system [PDF]
, 2010 Developing a localization system, with more precise performances than GPS that guarantees Europe autonomy is a complex challenge that ESA and a large number of European economical actors of space industry were decided to meet.
Bouchired, Steven +1 more
core +1 more source
Analysis of the Impact of Multipath on Galileo System Measurements
Remote Sensing, 2021 Multipath is one of the major source of errors in precise Global Navigation Satellite System positioning. With the emergence of new navigation systems, such as Galileo, upgraded signals are progressively being used and are expected to provide greater ...
Dominik Prochniewicz, Maciej Grzymala
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Journal of Marine Science and Engineering, 2020 This case study aims to investigate the effect of different Multi-GNSS EXperiment (MGEX) precise products provided by International GNSS Service (IGS) Analysis Centers (ACs) on post-processing kinematic Precise Point Positioning (PPP) accuracy ...
Serdar Erol
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Sensors, 2023 The global navigation satellite system (GNSS) signals are vulnerable to disruption sources, such as signal jamming. This, in turn, can cause severe degradation or discontinuities of the GNSS-based position, navigation, and timing services.
Abdelsatar Elmezayen +3 more
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Performances of a GNSS receiver for space-based applications [PDF]
, 2010 Space Vehicle (SV) life span depends on its station keeping capability. Station keeping is the ability of the vehicle to maintain position and orientation. Due to external perturbations, the trajectory of the SV derives from the ideal orbit.
Bousquet, Michel +3 more
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