Results 21 to 30 of about 138,872 (154)

Current State and Prospects of Satellite Navigation Applications in Transport

open access: yesPromet (Zagreb), 2007
The article describes new possibilities of how to use globalsatellite navigation system Galileo, which is made by the EuropeanUnion and its European Space Agency ESA.
Alica Kalašova, Libor Palička
doaj   +1 more source

Relativity in the Global Positioning System [PDF]

open access: yesLiving Reviews in Relativity, 2002
We need general relativity to understand extreme astrophysical realms. But the theory also turns out to be essential for the many mundane activities that nowadays rely on the precision of the GPS.
openaire   +5 more sources

Positioning with the Global Positioning System [PDF]

open access: yesInternational Astronomical Union Colloquium, 1980
AbstractThis year (1980) the U. S. Department of Defense has scheduled to have in operation six satellites of the Global Positioning System (GPS), which will provide timing and three dimensional position recovery potential to North America during certain segments of a day.
openaire   +1 more source

Research on Multi-sensor Fusion Localization for Autonomous-rail Rapid Tram

open access: yesKongzhi Yu Xinxi Jishu, 2022
Traditional positioning methods, such as GNSS (global navigation satellite system) and location base service, have large positioning error when applied in complex traffic scenarios such as like tunnels buildings and viaducts.
PAN Wenbo   +5 more
doaj   +3 more sources

Iterative least squares method for global positioning system [PDF]

open access: yesAdvances in Radio Science, 2011
The efficient implementation of positioning algorithms is investigated for Global Positioning System (GPS). In order to do the positioning, the pseudoranges between the receiver and the satellites are required.
Y. He, A. Bilgic
doaj   +1 more source

Single-Frequency Precise Point Positioning Using Regional Dual-Frequency Observations

open access: yesSensors, 2021
High-precision and low-cost single-frequency precise point positioning (SF-PPP) has been attracting more and more attention in numerous global navigation satellite system (GNSS) applications.
Junping Zou, Ahao Wang, Jiexian Wang
doaj   +1 more source

Research Article. Improved Dual Frequency PPP Model Using GPS and BeiDou Observations

open access: yesJournal of Geodetic Science, 2017
This paper introduces a new dual-frequency precise point positioning (PPP) model, which combines GPS and BeiDou observations. Combining GPS and BeiDou observations in a PPP model offers more visible satellites to the user, which is expected to enhance ...
Afifi A., El-Rabbany A.
doaj   +1 more source

A commentary of Hyper-accurate position in MIT Technology Review 2021

open access: yesFundamental Research, 2021
The positioning accuracy improvement of satellite navigation system support the development of industries related to high accuracy positioning. The BeiDou global satellite navigation system (BDS-3) started providing full-scale global services in 2020 ...
Xia Ren, Yuanxi Yang
doaj   +1 more source

Research on a mixed prediction method to vehicle integrated navigation systems

open access: yesInternational Journal of Advanced Robotic Systems, 2019
Aiming to improve the positioning accuracy of vehicle integrated navigation system (strapdown inertial navigation system/Global Positioning System) when Global Positioning System signal is blocked, a mixed prediction method combined with radial basis ...
Di Zhao, Huaming Qian, Dingjie Xu
doaj   +1 more source

global positioning system [PDF]

open access: yes, 2014
Global positioning system is now generally used during field investigations for obtaining precise locations but more importantly it has been employed to determine the plate movements. The results are used for determining the strain build-up in an area and seismic predictions.
openaire   +2 more sources

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