Results 71 to 80 of about 37,148,855 (157)
Space Weather, Volume 24, Issue 1, January 2026.Abstract The intensified solar maximum of Cycle 25 has heightened space weather risks to Global Navigation Satellite Systems (GNSS), where geomagnetic storms critically challenge Positioning, Navigation, and Timing (PNT) availability. Current wide‐area ionospheric models may fail to resolve extreme latitudinal Total Electron Content (TEC) gradients ...
Tong Liu +5 more
wiley +1 more source
IET Intelligent Transport Systems, Volume 20, Issue 1, January/December 2026.Accurate and reliable real‐time localization for lane‐keeping underpins safe navigation in autonomous vehicles; however, these systems are frequently exposed to sensor faults induced by environmental disturbances, which can result in critical integrity failures.
Keng Wei Chou, Yao Jiun Huang, Kang Li
wiley +1 more source
IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.The paper presents an experimental study of the standalone positioning performance of a high‐end survey grade and a mass‐market dual‐frequency GNSS receiver in covered agricultural environments (CAEs) comparing an ETFE polytunnel and a Cambridge‐style glass greenhouse against an open‐field baseline.
Alex Schofield +6 more
wiley +1 more source
Criticality of space based oscillators for the optimal performance of time-based signals
, 2023 The heart of a satellite based navigation system are the oscillators that are required for precise timing. This paper seeks to examine the critical role that Space-Borne Oscillators play in improving Performance of Global Navigation Satellite Systems ...
Chris Chatwin (4460602) +1 more
core +1 more source
Optimal Divergence-Free Hatch Filter for GNSS Single-Frequency Measurement
Sensors, 2017 The Hatch filter is a code-smoothing technique that uses the variation of the carrier phase. It can effectively reduce the noise of a pseudo-range with a very simple filter construction, but it occasionally causes an ionosphere-induced error for low ...
Byungwoon Park +4 more
doaj +1 more source
Structural Control and Health Monitoring, Volume 2026, Issue 1, 2026.Interferometric synthetic aperture radar (InSAR) processing is widely implemented to remotely inspect linear infrastructure, such as railway tracks, enabling a wide range of spatiotemporal coverage. Despite InSAR is nowadays integrated with other remote sensing data and in situ measurements to establish structural health monitoring systems of railway ...
Mehdi Koohmishi +4 more
wiley +1 more source
Structural Control and Health Monitoring, Volume 2026, Issue 1, 2026.This study evaluates the accuracy of satellite Interferometric Synthetic Aperture Radar (InSAR) for the structural health monitoring (SHM) of civil infrastructures, focusing on bridge displacements. A comparative analysis is conducted between displacement data obtained from InSAR and traditional topographic techniques, using the Colle Isarco Viaduct in
Daniel Tonelli +6 more
wiley +1 more source
Considerations on Ionospheric Correction and Integrity Algorithm for Korean SBAS
, 2014 Satellite Based Augmentation Systems (SBAS) provide ionospheric corrections at geographically five degree-spaced Ionospheric Grid Points (IGPs) and confidence bounds, called Grid Ionospheric Vertical Errors (GIVEs), on the error of those corrections ...
Lee, Jiyun, Bang, Eugene
core +1 more source
Optimised SBAS Ground Segment for Colombia Using Traffic and Ionospheric Risk Models
AerospaceThis paper presents the design, optimization, and performance evaluation of a Satellite-Based Augmentation System (SBAS) ground segment tailored to Colombia’s air navigation infrastructure, with emphasis on ionospheric anomalies in equatorial latitudes ...
Jaime Enrique Orduy +5 more
doaj +1 more source
GAGAN - The Indian satellite based augmentation system
, 2007 293-302Global Positioning System (GPS) from the USA, Global Navigation Satellite System (GLONASS) from the Russian Federation and the proposed GALILEO satellite navigation system from Europe are meant for providing position and timing information for a ...
Rao, K N Suryanarayana
core