Results 51 to 60 of about 2,307 (194)
Ionospheric Anomaly Detection to Support the BDSBAS
IEEE Access, 2020 Corrections and integrity bounds of the ionospheric delay generated at the Satellite-Based Augmentation System (SBAS) for aviation users may confront a wide range of ionospheric conditions over its update interval.
Junjie Bao +4 more
doaj +1 more source
Evolution of Maritime GNSS and RNSS Performance Standards
Remote Sensing, 2022 The primary means for electronic position fixing in use in contemporary maritime transport are shipborne GPS (Global Positioning System) receivers or DGPS (Differential GPS) receivers.
Paweł Zalewski +2 more
doaj +1 more source
Upper-bounding bias errors in satellite navigation
, 2014 A satellite navigation system for a safety critical application is required to provide an integrity alert of any malfunction; the probability that a navigation positioning error exceeds a given alert limit without an integrity alert is required to be ...
Iwamoto, Takashi
core +1 more source
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Rare earth elements (REEs) play an irreplaceable role in modern technology and industry. However, due to the highly similar physicochemical properties among REEs, their separation remains a significant challenge. Additionally, REEs often exist in low‐concentration solutions, making efficient REE recovery an urgent task.
Miao‐Miao Huang +6 more
wiley +1 more source
Evaluation of GNSS positioning accuracy from satellite-based augmentation systems in Thailand
Engineering and Applied Science Research, 2022 Satellite Based Augmentation System (SBAS) provides correction message services as an additional system to navigation satellites. Several SBAS services exist in many regions and usually cover a large area. Although, Thailand is not geographically located
Phunsap Thari +2 more
doaj
Performance Evaluation of Adjusted Spherical Harmonics Ionospheric Model Over Indian Region
IEEE Access, 2020 The ionosphere is perceived to be a predominant source of ranging error of Global Navigation Satellite System (GNSS) signals to degrade the positional accuracy.
Kondaveeti Siva Krishna +4 more
doaj +1 more source
Pseudorange Bias Analysis and Preliminary Service Performance Evaluation of BDSBAS
Remote Sensing, 2021 To satisfy the demands of civil aviation organizations and other users of satellite navigation systems for high-precision and high-integrity service performance, many countries and regions have established satellite-based augmentation systems (SBAS ...
Yuchen Liu +8 more
doaj +1 more source
A review of global navigation satellite and augmentation systems [PDF]
, 2019 The importance and application of global navigation satellite systems (GNSS) has never been greater; there is increasing demand for both commercial and government projects; indeed, owning and operating a GNSS facility has become a matter of national ...
Chatwin, Chris R, Lawal, Lasisi S
core
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 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