Results 11 to 20 of about 21,690,408 (274)

Precise positioning in real-time using GPS-RTK signal for visually impaired people navigation system [PDF]

open access: yes, 2010
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University, 24/9/2010.This thesis presents the research carried out to investigate and achieve highly reliable and accurate navigation system of guidance for visually ...
Al-Salihi, Nawzad Kameran
core   +7 more sources

Improved Ionospheric Correction for Dual Frequency and Differential GPS Positioning Methods [PDF]

open access: yes, 2007
A new three dimensional (3-D) electron density model has been developed that can give a very accurate description of the real ionospheric variation; latitudinally,longitudinally and altitudinally.
Nagarajoo, Karthigesu
core   +7 more sources

Informatisation of transport process using GPS navigation system [PDF]

open access: yes, 2009
Nowadays, internal business processes are one of the crucial factors of firms’ competitive advantage achievement, which is becoming increasingly important, not only on local but also on global markets.
Habjan, A, Andriopoulos, C
core   +6 more sources

Production of regional 1 km x 1 km water vapor fields through the integration of GPS and MODIS data [PDF]

open access: yes, 2004
<p>Atmospheric water vapor is a crucial element in weather, climate and hydrology. With the recent advance in Global Positioning System (GPS) Meteorology, ground-based GPS has become an operational tool that can measure precipitable water vapor ...
Li, Z.
core   +8 more sources

High precision positioning system for autopilot based on multi-sensor fusion [PDF]

open access: yesE3S Web of Conferences, 2021
For autonomous vehicles, autonomous positioning is a core technology in their development. A good positioning system not only helps them efficiently complete autonomous operations, but also improves safety performance.
Luo Haoru, Liu Kechun
doaj   +1 more source

Comprehensive Comparisons of Satellite Data, Signals, and Measurements between the BeiDou Navigation Satellite System and the Global Positioning System

open access: yesSensors, 2016
The Chinese BeiDou navigation satellite system (BDS) aims to provide global positioning service by 2020. The combined use of BDS and Global Positioning System (GPS) is proposed to provide navigation service with more stringent requirements.
Shau-Shiun Jan, An-Lin Tao
doaj   +1 more source

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

Construction and Accuracy Analysis of a BDS/GPS-Integrated Positioning Algorithm for Forests

open access: yesCroatian Journal of Forest Engineering, 2021
The objective of this study was to construct a BeiDou navigation satellite system (BDS)/ global positioning system (GPS)-integrated positioning algorithm that meets the accuracy requirement of forest surveys and to analyze its accuracy to provide ...
Fei Yan, Xueqi Hu, Lidan Xu, Yongrui Wu
doaj   +1 more source

Multi-GNSS Combined Precise Point Positioning Using Additional Observations with Opposite Weight for Real-Time Quality Control

open access: yesRemote Sensing, 2019
The emergence of multiple global navigation satellite systems (multi-GNSS), including global positioning system (GPS), global navigation satellite system (GLONASS), Beidou navigation satellite system (BDS), and Galileo, brings not only great ...
Wenju Fu   +6 more
doaj   +1 more source

Positioning performance analysis on combined GPS/BDS precise point positioning

open access: yesGeodesy and Geodynamics, 2020
Combining the observation data from five Multi-GNSS Experiment (MGEX) stations with the precise orbit and clock products from Global Positioning System (GPS) and BeiDou Navigation Satellite System (BDS), we studied the model of combined GPS/BDS precise ...
Jing Xiong, Fei Han
doaj   +1 more source

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