Results 51 to 60 of about 18,773 (179)

Leveraging Multi-LEO Satellite Signals for Opportunistic Positioning

open access: yesIEEE Access
The study of navigation solutions other than GNSS is becoming increasingly important due to growing concerns about the vulnerability of GNSS to interference. The use of existing LEO satellite signals is a promising option in this respect.
Nabil Jardak, Ronan Adam, Quentin Jault
doaj   +1 more source

Analysis of differential code biases and inter-system biases for GPS and NavIC satellite constellations

open access: yesAIMS Electronics and Electrical Engineering, 2021
Multi Global Navigation Satellite System (GNSS) plays an essential role in navigation and geodesy fields for positioning, Navigation, and Timing (PNT) services.
K. Siva Krishna , D. Venkata Ratnam
doaj   +1 more source

Galileo and EGNOS as an asset for UTM safety and security [PDF]

open access: yes, 2019
GAUSS (Galileo-EGNOS as an Asset for UTM Safety and Security) is a H2020 project1 that aims at designing and developing high performance positioning systems for drones within the U-Space framework focusing on UAS (Unmanned Aircraft System) VLL (Very Low ...
Andrade-Cetto, Juan   +7 more
core  

Upper-bounding bias errors in satellite navigation

open access: yes, 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

Measurement signal quality assessment on all available and new signals of multi-GNSS (GPS, GLONASS, Galileo, BDS, and QZSS) with real data [PDF]

open access: yes, 2016
Global Navigation Satellite Systems (GNSS) Carrier Phase (CP)-based high-precision positioning techniques have been widely used in geodesy, attitude determination, engineering survey and agricultural applications.
Gethin W. Roberts   +6 more
core   +1 more source

Multi-layered Multi-Constellation Global Navigation Satellite System Interference Mitigation

open access: yesNavigation, 2023
Several layers of defense can be implemented in a global navigation satellite system (GNSS) receiver to improve its performance in the presence of interference.
Ciro Gioia, Daniele Borio
doaj   +1 more source

Shadow Matching: A New GNSS Positioning Technique for Urban Canyons [PDF]

open access: yes, 2011
The Global Positioning System (GPS) is unreliable in dense urban areas, known as urban canyons, which have tall buildings or narrow streets. This is because the buildings block the signals from many of the satellites.
Groves, PD
core   +1 more source

NaviSoC: High-Accuracy Low-Power GNSS SoC with an Integrated Application Processor

open access: yesSensors, 2020
A dual-frequency all-in-one Global Navigation Satellite System (GNSS) receiver with a multi-core 32-bit RISC (reduced instruction set computing) application processor was integrated and manufactured as a System-on-Chip (SoC) in a 110 nm CMOS ...
Tomasz Borejko   +11 more
doaj   +1 more source

Implicit Cooperative Positioning in Vehicular Networks [PDF]

open access: yes, 2017
Absolute positioning of vehicles is based on Global Navigation Satellite Systems (GNSS) combined with on-board sensors and high-resolution maps. In Cooperative Intelligent Transportation Systems (C-ITS), the positioning performance can be augmented by ...
Denis, Benoit   +5 more
core   +2 more sources

GNSS-based Location Determination System Architecture for railway performance assessment in presence of local effects [PDF]

open access: yes, 2018
GNSS plays a strategic role on the introduction of the Virtual Balise functionality and the train integrity. Thanks to GNSS, it could be possible to realize cost effective solutions to increase the safety in the regional lines, where the traffic density ...
Bonenberg, Lukasz   +9 more
core   +1 more source

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