Results 31 to 40 of about 1,198,194 (418)
Resilient satellite navigation empowers modern science, economy, and society
, 2021 Established on the exact mathematical principles, understanding of radio-wave propagation, and statistical signal processing and information theory, satellite navigation has become an essential cornerstone of modern civilisation, and an indispensable ...
R. Filjar, M. C. Damas, T. Iliev
semanticscholar +1 more source
Velocity and Acceleration of NavIC Satellites using Broadcast Ephemeris [PDF]
International Journal of Mathematical, Engineering and Management Sciences, 2018 The current manuscript describes a methodology to derive velocity and acceleration of NavIC satellites from the broadcast ephemeris. A fourth-order central differencing formula is used to derive NavIC satellites’ Earth-Centred-Earth-Fixed (ECEF) velocity
Bidyut B. Gogoi +3 more
doaj +1 more source
End-Cloud Collaboration Navigation Planning Method for Unmanned Aerial Vehicles Used in Small Areas
Sensors, 2023 Unmanned aerial vehicle (UAV) collaboration has become the main means of indoor and outdoor regional search, railway patrol, and other tasks, and navigation planning is one of the key, albeit difficult, technologies.
Huajie Xiong +3 more
doaj +1 more source
IEEE Communications Surveys and Tutorials, 2020 Intentional interference in satellite navigation is becoming an increasing threat for modern systems relying on Global Navigation Satellite Systems (GNSS).
Ruben Morales-Ferre +4 more
semanticscholar +1 more source
LEO Enhanced Global Navigation Satellite System (LeGNSS): progress, opportunities, and challenges
Geo-Spatial Information Science, 2021 With the completion of Chinese BeiDou Navigation Satellite System (BDS), the world has begun to enjoy the Positioning, Navigation, and Timing (PNT) services of four Global Navigation Satellite Systems (GNSS).
Haibo Ge +8 more
semanticscholar +1 more source
Optical clock technologies for global navigation satellite systems
GPS Solutions, 2021 Future generations of global navigation satellite systems (GNSSs) can benefit from optical technologies. Especially optical clocks could back-up or replace the currently used microwave clocks, having the potential to improve GNSS position determination ...
T. Schuldt +14 more
semanticscholar +1 more source
Multi-Level Fusion Indoor Positioning Technology Considering Credible Evaluation Analysis
Remote Sensing, 2023 Aiming at the problems of the low robustness and poor reliability of a single positioning source in complex indoor environments, a multi-level fusion indoor positioning technology considering credible evaluation is proposed.
Lu Huang +5 more
doaj +1 more source
Robust state and protection-level estimation within tightly coupled GNSS/INS navigation system [PDF]
Liu, S., Wang, K. & Abel, D. Robust state and protection-level
estimation within tightly coupled GNSS/INS navigation system. GPS Solut 27,
111 (2023). https://doi.org/10.1007/s10291-023-01447-z, 2021 In autonomous applications for mobility and transport, a high-rate and highly accurate vehicle-state estimation is achieved by fusing measurements of global navigation satellite systems (GNSS) and inertial sensors. The state estimation and its protection-level generation often suffer from satellite-signal disturbances in urban environments and ...
arxiv +1 more source
Adaptive Spoofing Suppression Algorithm for GNSS Based on Multiple Antennas Array
Sensors, 2020 The signals of navigation satellites are easily affected by spoofing interference, causing the wrong position, speed or Universal Time Coordinate of the receiver to be calculated.
Guangwei Fan +4 more
doaj +1 more source
An Innovative Fingerprint Location Algorithm for Indoor Positioning Based on Array Pseudolite
Sensors, 2019 Since the signals of the global navigation satellite system (GNSS) are blocked by buildings, accurate positioning cannot be achieved in an indoor environment.
Lu Huang +7 more
doaj +1 more source