Results 11 to 20 of about 22,812,475 (283)

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   +8 more sources

ANALYSIS OF POSITIONING DEVIATION BETWEEN BEIDOU AND GPS BASED ON NATIONAL REFERENCE STATIONS IN CHINA [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2021
In order to probe into the characteristics of positioning deviation between Beidou Navigation Satellite System (Beidou) and global positioning system (GPS), and investigate possible contribution of Beidou data to refinement of global coordinate system ...
M. Chen, Q. Zhang, Q. Zhang
doaj   +1 more source

Wetland vegetation changes in response to climate change and human activities on the Tibetan Plateau during 2000–2015

open access: yesFrontiers in Ecology and Evolution, 2023
The Tibetan Plateau (TP), known as the third pole, is the highest plateau in the world. It has numerous wetlands, which are important ecological security barriers and plays an important role in mitigating global climate change. This paper employed breaks
Yuhan Chen   +11 more
doaj   +1 more source

ConGPS: A Smart Container Positioning System Using Inertial Sensor and Electronic Map with Infrequent GPS

open access: yesSensors, 2023
Real-time global positioning is important for container-based logistics. However, a challenge in real-time global positioning arises from the frequency of both global positioning system (GPS) calls and GPS-denied environments during transportation.
Shan Huang   +5 more
doaj   +1 more source

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   +4 more sources

OL-SLAM: A Robust and Versatile System of Object Localization and SLAM

open access: yesSensors, 2023
This paper proposes a real-time, versatile Simultaneous Localization and Mapping (SLAM) and object localization system, which fuses measurements from LiDAR, camera, Inertial Measurement Unit (IMU), and Global Positioning System (GPS).
Chao Chen   +6 more
doaj   +1 more source

UAV ONBOARD GPS IN POSITIONING DETERMINATION [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016
The establishment of ground control points is a critical issue in mapping field, especially for large scale mapping. The fast and rapid technique for ground control point’s establishment is very important for small budget projects.
K. N. Tahar, S. S. Kamarudin
doaj   +1 more source

Assessing the Performance of Precise Point Positioning (PPP) with the Fully Serviceable Multi-GNSS Constellations: GPS, BDS-3, and Galileo

open access: yesRemote Sensing, 2023
Nowadays, both BDS-3 and Galileo can provide global positioning and navigation services. This contribution carried out a comprehensive analysis and validation of positioning performance in terms of positioning accuracy (RMS) and convergence time, which ...
Zunyao Hou, Feng Zhou
doaj   +1 more source

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   +4 more sources

Analysis of iridium-augmented GPS positioning performance

open access: yesThe Journal of Engineering, 2019
Although the global positioning system (GPS) has a series of advantages such as global and high precision, there are still many deficiencies, in many cases, GSP cannot meet the requirements of the positioning accuracy.
Liu Xiao, Zhang Lei
doaj   +1 more source

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