Results 41 to 50 of about 431 (152)

Detecting GNSS Jamming and Spoofing on Android Devices

open access: yesNavigation, 2022
Global navigation satellite system (GNSS) location engines on Android devices provide location and navigation utility to billions of people worldwide. However, these location engines currently have very limited protection from threats to their position ...
Nicholas Spens   +3 more
doaj   +1 more source

High-Precision Positioning Using Plane-Constrained RTK Method in Urban Environments

open access: yesNavigation, 2022
High-precision positioning methods have drawn great attention in recent years due to the rapid development of smart vehicles as well as automatics driving technology.
Chen Zhuang   +5 more
doaj   +1 more source

Signal Quality Monitoring Based on Chip Domain Observables: Theory, Design, and Implementation

open access: yesNavigation, 2022
Signal quality monitoring (SQM) is a technique utilized by satellite- and ground-based augmentation systems (SBAS/GBAS) to detect potential hazardous deformations in signals and better protect integrity for safety-critical users.
Xiang Wang   +4 more
doaj   +1 more source

Navigation and Ionosphere Characterization Using High-Frequency Signals: A Performance Analysis

open access: yesNavigation, 2022
The performance of a proposed high-frequency (HF) navigation concept is analyzed using simulated data. The method relies on pseudorange and beat carrier-phase measurements of signals that propagate in the ionosphere along curved trajectories, where ...
Yoav Baumgarten   +2 more
doaj   +1 more source

Satellite Ephemeris Parameterization Methods to Support Lunar Positioning, Navigation, and Timing Services

open access: yesNavigation
Plans to establish a satellite network around the Moon to support communication, position, navigation, and timing services are rapidly evolving. Satellites that are part of this system broadcast their ephemeris as finite parameters to lunar users for ...
Marta Cortinovis   +2 more
doaj   +1 more source

Improving GNSS Positioning Using Neural-Network-Based Corrections

open access: yesNavigation, 2022
Deep neural networks (DNNs) are a promising tool for global navigation satellite system (GNSS) positioning in the presence of multipath and non-line-of-sight errors, owing to their ability to model complex errors using data. However, developing a DNN for
Ashwin V. Kanhere   +3 more
doaj   +1 more source

Timescale Realization with Linked Platforms for AltPNT

open access: yesNavigation
Recognition of the critical importance of positioning, navigation, and timing to all economic sectors is driving the development of diverse alternatives to global navigation satellite systems (GNSSs), termed AltPNT.
Christopher Flood, Penina Axelrad
doaj   +1 more source

Resilience Monitoring for Multi-Filter All-Source Navigation Framework With Assurance

open access: yesNavigation, 2022
The Autonomous and Resilient Management of All-source Sensors (ARMAS) framework monitors residual-space test statistics across unique sensor-exclusion banks of filters (known as subfilters) to provide a resilient, fault-resistant all-source navigation ...
Jonathon S. Gipson, Robert C. Leishman
doaj   +1 more source

Tightly Coupled Graph Neural Network and Kalman Filter for Smartphone Positioning

open access: yesNavigation
Smartphone positioning based on global navigation satellite systems is crucial for various applications, including navigation, emergency response, and augmented and virtual reality.
Adyasha Mohanty, Grace Gao
doaj   +1 more source

Home - About - Disclaimer - Privacy