Results 1 to 10 of about 15,295,462 (264)

Validation of the Accuracy and Convergence Time of Real Time Kinematic Results Using a Single Galileo Navigation System [PDF]

open access: yesSensors, 2018
For the last two decades, the American GPS and Russian GLONASS were the basic systems used in global positioning and navigation. In recent years, there has been significant progress in the development of positioning systems.
Zbigniew Siejka
doaj   +2 more sources

Chip-Scale Ultra-Low Field Atomic Magnetometer Based on Coherent Population Trapping

open access: yesSensors, 2021
We report a chip-scale atomic magnetometer based on coherent population trapping, which can operate near zero magnetic field. By exploiting the asymmetric population among magnetic sublevels in the hyperfine ground state of cesium, we observe that the ...
Hyun-Gue Hong   +7 more
doaj   +1 more source

Dynamic Trust-Based Device Legitimacy Assessment Towards Secure IoT Interactions

open access: yesJournal of Communications Software and Systems, 2022
Establishing trust-based interactions in heterogeneously connected devices appears to be the prominent mechanism in addressing the prevailing concerns of confidence, reliability and privacy relevant in establishing secure interactions among connected ...
Vishwanath Garagad, Nalini Iyer
doaj   +1 more source

Evaluation of Inter-System Bias between BDS-2 and BDS-3 Satellites and Its Impact on Precise Point Positioning

open access: yesRemote Sensing, 2020
The BeiDou navigation satellite system (BDS) currently has 41 satellites in orbits and will reach its full constellation following the launch of the last BDS satellite in June 2020 to provide navigation, positioning, and timing (PNT) services for global ...
Wen Zhao   +4 more
doaj   +1 more source

RM-ADR: Resource Management Adaptive Data Rate for Mobile Application in LoRaWAN

open access: yesSensors, 2021
LoRaWAN is renowned and a mostly supported technology for the Internet of Things, using an energy-efficient Adaptive Data Rate (ADR) to allocate resources (e.g., Spreading Factor (SF)) and Transmit Power (TP) to a large number of End Devices (EDs).
Khola Anwar   +5 more
doaj   +1 more source

GNSS RTK Positioning Augmented with Large LEO Constellation

open access: yesRemote Sensing, 2019
It is widely known that in real-time kinematic (RTK) solution, the convergence and ambiguity-fixed speeds are critical requirements to achieve centimeter-level positioning, especially in medium-to-long baselines.
Xingxing Li   +5 more
doaj   +1 more source

Kinematic Precise Point Positioning Using Multi-Constellation Global Navigation Satellite System (GNSS) Observations

open access: yesISPRS International Journal of Geo-Information, 2017
Multi-constellation global navigation satellite systems (GNSSs) are expected to enhance the capability of precise point positioning (PPP) by improving the positioning accuracy and reducing the convergence time because more satellites will be available ...
Xidong Yu, Jingxiang Gao
doaj   +1 more source

Impact of Number of Artificial Ants in ACO on Network Convergence Time: A Survey

open access: yesInternational Journal of Informatics, Information System and Computer Engineering, 2022
Due to the dynamic nature of computer networks today, there is need to make the networks self-organized. Selforganization can be achieved by applying intelligent systems in the networks to improve convergence time. Bio-inspired algorithms that imitate
Samuel W Lusweti   +2 more
doaj   +1 more source

GPS/GLONASS Combined Precise Point Positioning with Receiver Clock Modeling

open access: yesSensors, 2015
Research has demonstrated that receiver clock modeling can reduce the correlation coefficients among the parameters of receiver clock bias, station height and zenith tropospheric delay.
Fuhong Wang, Xinghan Chen, Fei Guo
doaj   +1 more source

LEO Enhanced Global Navigation Satellite System (LeGNSS): progress, opportunities, and challenges

open access: yesGeo-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
doaj   +1 more source

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