Results 51 to 60 of about 1,168 (189)

A Fast Satellite Selection Algorithm Based on Hierarchical Clustering and Iterative Subset Optimization

Remote Sensing
When calculating positions, finding the optimal satellite subset is often a compromise between real-time performance and accuracy. This paper proposes a satellite selection method based on hierarchical clustering and iterative optimization.
Dan Jing, Weidie Li, Liang Han, Xinchen Li, Liangchao Li, Yan Zhang, Liang Guo, Mengdao Xing   +7 more
doaj   +1 more source

A Study of Error Reduction in Optical Triangulation for Short-Range Intervehicle Positioning

IEEE Photonics Journal, 2022
The long-existing problem of high positioning inaccuracy by triangulation in the far region in short-range vehicle-to-vehicle (V2V) communication environments is investigated in this study.
Wern-Yarng Shieh, Yu-Feng Zhang, Chen-Chien Hsu, Xiao-Bo Guo   +3 more
doaj   +1 more source

Impacts of the May 2024 Extreme Geomagnetic Storm on Global High‐Accuracy GPS Positioning Solutions

Space Weather, Volume 23, Issue 10, October 2025.
Abstract The May 2024 geomagnetic storm has been recognized as the most severe one in the past two decades and was categorized as an “extreme” (G5) event according to the NOAA space weather scales. This study applies Precise Point Positioning (PPP) software PRIDE PPP‐AR to over 5,800 worldwide GNSS receiver data to highlight the vulnerability of high ...
Zhe Yang, Y. T. Jade Morton
wiley   +1 more source

Positioning of Lightning Electromagnetic Radiation Sources With Satellite Constellations: Simulation and Preliminary Validation

Earth and Space Science, Volume 12, Issue 3, March 2025.
Abstract Satellites, equipped with electromagnetic sensors, can detect and locate the lightning electromagnetic radiation sources (LERS) in the thunderstorm over the globe surface of the Earth, delivering data regarding occurrence time, geolocation, and intensity. This paper presents the study on the three‐dimensional (3D) positioning of LERS utilizing
Xiao Li, Zongxiang Li, Xiaoqiang Li, Xiong Zhang, Yunfen Chang, Kai Zhang, Yongli Wei, Baofeng Cao, Peng Li   +8 more
wiley   +1 more source

Applying Back-propagation Neural Networks to GDOP Approximation

, 2002
In this paper, back-propagation (BP) neural networks (NN) are applied to the GPS satellite Geometric Dilution of Precision (GDOP) approximation. The methods using BPNN are general enough to be applicable regardless of the number of satellite signals ...
Dah-Jing Jwo, Kuo-Pin Chin
core   +1 more source

A Multilevel Optimised Algorithm for UWB Positioning in Indoor Environment

IET Communications, Volume 19, Issue 1, January/December 2025.
In ultra‐wideband indoor positioning systems, complex environmental factors such as multipath effects, occlusions, and non‐line‐of‐sight propagation often leads to decreased positioning accuracy and limited system robustness. To address this issue, this paper proposes a multilevel optimised estimation algorithm that integrates Particle Filtering with ...
Deshu Guo, Aihua Zhang, Haowen Xia
wiley   +1 more source

Optimization of Location Estimation Utilizing GDOP Technique with Cooperation of Relay Station

, 2017
Geometric Dilution of Precision (GDOP) has always played an important role in satellite navigation system. This paper presents the extension of GDOP as a location estimation technique to determine the location of a Relay Station (RS).
Isa, M.S.M.; Faculty of Electronic and Computer Engineering, Universiti Teknikal Malaysia Melaka, Malaysia., Isa, A.A.M.; Faculty of Electronic and Computer Engineering, Universiti Teknikal Malaysia Melaka, Malaysia., Othman, M.H.; Faculty of Electronic and Computer Engineering, Universiti Teknikal Malaysia Melaka, Malaysia., Zin, M.S.I.M.; Faculty of Electronic and Computer Engineering, Universiti Teknikal Malaysia Melaka, Malaysia., Manap, Z.; Faculty of Electronic and Computer Engineering, Universiti Teknikal Malaysia Melaka, Malaysia.   +4 more
core   +1 more source

Satellite Availability and Service Performance Evaluation for Next-Generation GNSS, RNSS and LEO Augmentation Constellation

Remote Sensing, 2021
Positioning accuracy is affected by the combined effect of user range errors and the geometric distribution of satellites. Dilution of precision (DOP) is defined as the geometric strength of visible satellites.
Haomeng Cui, Shoujian Zhang
doaj   +1 more source

Implementation and Performance Analysis of RTK‐GNSS in Wearable Devices for Athletes in Harsh Environments

Electronics Letters, Volume 61, Issue 1, January/December 2025.
This study investigates the implementation of real‐time kinematic global navigation satellite system (RTK‐GNSS) technique in wearable electronic performance and tracking system for football players to obtain highly accurate positioning data, even in harsh environments.
Mingu Kim, Bit Kim, Chulwoo Park, Jinsung Yoon   +3 more
wiley   +1 more source

Seeking GDOP-optimal flower constellations for global coverage problems through evolutionary algorithms [PDF]

, 2014
In this paper, given a certain number of satellites, which is limited due to the sort of mission or economical reasons, the Flower Constellation with satellites which has the best geometrical configuration for a certain global coverage problem is sought ...
Mortari, D., Avendaño, M., Casanova, D.
core   +1 more source