Application of Improved Genetic Algorithm Based on Voronoi Partitioning in Pseudolite Deployment for Tunnel Positioning Systems [PDF]
SensorsReliable high-precision positioning in railway tunnels is essential for intelligent train operation and safety monitoring, yet GNSS signals are severely degraded by blockage and multipath.
Kun Xie +3 more
doaj +2 more sources
Analysis of LNSS satellite occlusion in the southern polar region of the Moon based on DEM [PDF]
Scientific ReportsThe Moon’s Southern Pole region is crucial due to the unique terrain features. This study suggests using Digital Elevation Model (DEM) data to assess the positioning performance of the Lunar Navigation Satellite System (LNSS) in this area.
Yun Zhang +5 more
doaj +2 more sources
Geodesy and Geodynamics, 2022 Impact of satellite elevation cutoff angle and position dilution of precision (PDOP) mask change on epoch-wise variance components of unmodeled effects that accompany relative Global Positioning System (GPS) positioning is presented herein. Data used for
Darko Anđić
exaly +3 more sources
Improvements in PPP by Integrating GNSS with LEO Satellites: A Geometric Simulation [PDF]
SensorsThe precise point positioning (PPP) method in GNSS is based on the processing of undifferenced phase observations. For long static sessions, this method provides results characterized by accuracies better than one centimeter, and has become a standard ...
Marianna Alghisi +2 more
doaj +2 more sources
Assignment of hybrid laser and microwave inter-satellite links for navigation satellite systems [PDF]
Scientific ReportsA hybrid network comprising both laser and microwave inter-satellite links (ISLs) has been established within navigation satellite constellations. Leveraging the flexible construction of microwave links and the high ranging accuracy and communication ...
Nan Wang +6 more
doaj +2 more sources
The optimization of low Earth orbit satellite constellation visibility with genetic algorithm for improved navigation potential [PDF]
Scientific ReportsTo tackle visibility optimization challenges in Low Earth Orbit satellite constellations, this study proposed an enhanced framework based on an adaptive parallel Genetic Algorithm (GA).
Chao Qin, Yanbin Gao, Yihuan Wang
doaj +2 more sources
Environmental Context Indicator for Evaluating Quality of GNSS Observation Environment Using Android Smartphone [PDF]
SensorsWith location-based services becoming more common, smartphone global navigation satellite systems (GNSS) have begun to play a significant role in daily life.
Bong-Gyu Park +3 more
doaj +2 more sources
IEEE AccessGlobal navigation satellite system (GNSS) monitoring stations established in canyon environments inevitably face challenges such as multipath effects, diffracted signals, and non-line-of-sight (NLOS) reception due to obstructions. To address this problem,
Qing-Feng Wu, Xiaoya Wang
exaly +3 more sources
Satellite Selection Strategy and Method for Signals of Opportunity Navigation and Positioning with LEO Communication Satellites [PDF]
SensorsExperts and scholars from various nations have proposed studying low Earth orbit (LEO) satellite signals as the space-based signals of opportunity (SOPs) for navigation and positioning.
Yanhua Tao +4 more
doaj +2 more sources
Satellite Constellation Optimization for Emitter Geolocalization Missions Based on Angle of Arrival Techniques [PDF]
SensorsThe context of this study is the geolocation of signal emitters on the Earth’s surface through satellite platforms able to perform Angle of Arrival (AOA) measurements.
Marcello Asciolla +4 more
doaj +2 more sources