Results 11 to 20 of about 109 (92)

Forward‐Looking Study of Solar Maximum Impact in 2025: Effects of Satellite Navigation Failure on Aviation Network Operation in the Greater Bay Area, China

Space Weather, Volume 21, Issue 12, December 2023., 2023
Abstract Satellite navigation based on the Global Navigation Satellite System can provide aircraft with more precise guidance and increase flight efficiency. However, severe space weather events can cause satellite navigation failure due to the dramatic increase in total electron content and irregularities in the ionosphere.
Dabin Xue, Jian Yang, Zhizhao Liu, Wei Cong   +3 more
wiley   +1 more source

Two‐Way Assessment of Ionospheric Maps Performance Over the Brazilian Region: Global Versus Regional Products

Space Weather, Volume 21, Issue 2, February 2023., 2023
Abstract Vertical total electron content (VTEC) has great importance in describing the ionosphere. VTEC values are commonly distributed in regular grids by means of so‐called global ionospheric maps (GIMs) and regional ionospheric maps (RIMs). Although considerable research has been conducted to develop regional and global models, there is no clear ...
Gabriel O. Jerez, Manuel Hernández‐Pajares, Andreas Goss, Fabricio S. Prol, Daniele B. M. Alves, João F. G. Monico, Michael Schmidt   +6 more
wiley   +1 more source

GPS‐SBAS‐Based Orbit Determination for Low Earth Orbiting Satellites

International Journal of Aerospace Engineering, Volume 2023, Issue 1, 2023., 2023
A space‐based augmentation system (SBAS) provides real‐time GNSS correction signals via geostationary satellites for near‐ground GNSS users. To use the SBAS correction for low Earth orbit (LEO) satellites, the correction, especially the ionosphere correction, must be adjusted for the LEO altitude.
Mingyu Kim, Jeongrae Kim, Enrico C. Lorenzini   +2 more
wiley   +1 more source

A CIPSO-FCM-Based RAIM Algorithm for the GPS/BDS Integrated Navigation System

IEEE Access, 2021
The receiver integrity monitoring of a satellite navigation system directly affects positioning accuracy and train safety. The GPS/BDS (Global Positioning System/BeiDou Navigation System) integrated navigation system can meet the requirements of RAIM ...
Miao Luo, Jianwu Dang, Zhanjun Hao, Zhenhai Zhang   +3 more
doaj   +1 more source

An Improved Adaptive Simulated Annealing Particle Swarm Optimization Algorithm for ARAIM Availability

Journal of Advanced Transportation, Volume 2023, Issue 1, 2023., 2023
Civil aviation transportation equipment is more convenient and faster than other transportation tools and is an essential part of intelligent transportation. It is significant to study the reliability of positioning information and enhance traffic safety. Advanced receiver autonomous integrity monitoring (ARAIM) can provide vertical guidance during the
Ershen Wang, Xiaozhu Shi, Xidan Deng, Jing Gao, Wei Zhang, Huan Wang, Song Xu, Wen Liu   +7 more
wiley   +1 more source

Mitigating GNSS Multipath Effects Using XGBoost Integrated Classifier Based on Consistency Checks

International Journal of Antennas and Propagation, Volume 2022, Issue 1, 2022., 2022
Under the influence of urban building roads, especially interference from multipath effects, global navigation satellite system (GNSS) receiver‐related output signal distortion can affect the robustness of the positioning system and the final positioning accuracy.
Dengao Li, Xiaoli Ma, Jumin Zhao, Fanming Wu, Shobhit K. Patel   +4 more
wiley   +1 more source

Interference Mitigation Based on Low Complexity Subspace Tracking Method for Vehicle Positioning

Discrete Dynamics in Nature and Society, Volume 2022, Issue 1, 2022., 2022
Advanced driver assistance systems and automatic driving have drawn lots of attentions due to user’s multiapplication needs. Among different technologies, the integration of Inertial Navigation System (INS) and Global Navigation Satellite System (GNSS) is a key technique with the decreasing costs of Inertial Measurement Unit (IMU) and the increasing ...
Ping Zhang, Qiang Wu, Binbin Jing, Filippo Cacace   +3 more
wiley   +1 more source

Worst-Case Integrity Risk Sensitivity for RAIM with Constellation Modernization

Remote Sensing, 2023
The integrity improvement of receiver autonomous integrity monitoring (RAIM) can benefit from a combination of constellations. With the rapid development of constellation modernization, integrity parameters, including the probability of satellite fault ...
Liuqi Wang, Liang Li, Ruijie Li, Min Li, Li Cheng   +4 more
doaj   +1 more source

Calculation of Optimal Vertical Protection Level Based on Integrity Risk and Continuity Risk [PDF]

Jisuanji gongcheng, 2017
In order to reduce the integrity risks and continuity risks in the process of precision vertical guidance of aircraft,and make the Receiver Autonomous Integrity Monitoring(RAIM) algorithm provide the horizontal and vertical integrity for security,this ...
YANG Kai,GUO Chengjun
doaj   +1 more source

Performance Analyses of a RAIM Algorithm for Kalman Filter with GPS and NavIC Constellations

Sensors, 2021
This paper evaluates the performance of an integrity monitoring algorithm of global navigation satellite systems (GNSS) for the Kalman filter (KF), termed KF receiver autonomous integrity monitoring (RAIM).
Susmita Bhattacharyya
doaj   +1 more source