Results 11 to 20 of about 15,295,462 (264)

Assessment of BeiDou-3 and Multi-GNSS Precise Point Positioning Performance

Sensors, 2019
With the launch of BDS-3 and Galileo new satellites, the BeiDou navigation satellite system (BDS) has developed from the regional to global system, and the Galileo constellation will consist of 26 satellites in space. Thus, BDS, GPS, GLONASS, and Galileo
Guoqiang Jiao, Shuli Song, Yulong Ge, Ke Su, Yangyang Liu   +4 more
doaj   +1 more source

Health Big Data Classification Using Improved Radial Basis Function Neural Network and Nearest Neighbor Propagation Algorithm

IEEE Access, 2019
Health big data classification can effectively improve the level of medical and health services and management, help medical staff to carry out auxiliary diagnosis, improve the efficiency of doctors and the accuracy of diagnosis.
Congshi Jiang, Yihong Li
doaj   +1 more source

External Tropospheric Corrections by Using Kriging Interpolation for Improving PPP-RTK Positioning Solutions

Remote Sensing, 2022
With the availability of satellite carrier-phase delay corrections provided by a reference network or the International GNSS Service (IGS), the integer ambiguity resolution for a single receiver can be successfully achieved, which is the so-called PPP ...
Chuanfeng Song, Hongyang Ma, Huizhong Zhu, Bo Wu, Nan Shen   +4 more
doaj   +1 more source

Design optimisation of low earth orbit constellation based on BeiDou Satellite Navigation System precise point positioning

IET Radar, Sonar & Navigation, 2022
The use of low earth orbit (LEO) satellites to enhance the performance of global navigation satellite system navigation and positioning services has become a popular research topic.
Jing Liu, Jinming Hao, Yan Yang, Zheyu Xu, Weiping Liu, Renzhe Wu   +5 more
doaj   +1 more source

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

Remote 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

Analysis of Different Weighting Functions of Observations for GPS and Galileo Precise Point Positioning Performance

Remote Sensing, 2022
This research presents the analysis of using different weighting functions for the GPS and Galileo observations in Precise Point Positioning (PPP) performance for globally located stations for one week in 2021.
Damian Kiliszek, Krzysztof Kroszczyński, Andrzej Araszkiewicz   +2 more
doaj   +1 more source

A New Weighting Approach with Application to Ionospheric Delay Constraint for GPS/GALILEO Real-Time Precise Point Positioning

Applied Sciences, 2018
The real-time precise point positioning (RT PPP) technique has attracted increasing attention due to its high-accuracy and real-time performance. However, a considerable initialization time, normally a few hours, is required in order to achieve the ...
Tianjun Liu, Jian Wang, Hang Yu, Xinyun Cao, Yulong Ge   +4 more
doaj   +1 more source

Accuracy of Precise Point Positioning (PPP) with the use of different International GNSS Service (IGS) products and stochastic modelling [PDF]

Geodesy and Cartography, 2018
This paper provides analyses of the accuracy and convergence time of the PPP method using GPS systems and different IGS products. The official IGS products: Final, Rapid and Ultra Rapid as well as MGEX products calculated by the CODE analysis centres ...
Damian Kiliszek, Marcin Szołucha, Krzysztof Kroszczyński   +2 more
doaj   +1 more source

On the Convergence of Ionospheric Constrained Precise Point Positioning (IC-PPP) Based on Undifferential Uncombined Raw GNSS Observations

Sensors, 2013
Precise Point Positioning (PPP) has become a very hot topic in GNSS research and applications. However, it usually takes about several tens of minutes in order to obtain positions with better than 10 cm accuracy.
Hongping Zhang, Zhouzheng Gao, Maorong Ge, Xiaoji Niu, Ling Huang, Rui Tu, Xingxing Li   +6 more
doaj   +1 more source

Improving the Convergence Period of Adaptive Data Rate in a Long Range Wide Area Network for the Internet of Things Devices

Energies, 2021
A Long-Range Wide Area Network (LoRaWAN) is one of the most efficient technologies and is widely adopted for the Internet of Things (IoT) applications. The IoT consists of massive End Devices (EDs) deployed over large geographical areas, forming a large ...
Khola Anwar, Taj Rahman, Asim Zeb, Yousaf Saeed, Muhammad Adnan Khan, Inayat Khan, Shafiq Ahmad, Abdelaty Edrees Abdelgawad, Mali Abdollahian   +8 more
doaj   +1 more source