Results 11 to 20 of about 418 (139)

Maritime DGPS System Positioning Accuracy as a Function of the HDOP in the Context of Hydrographic Survey Performance

open access: yesRemote Sensing, 2022
The Differential Global Positioning System (DGPS) is a marine navigation system operating at frequencies of 283.5–325 kHz, which is now the primary method for locating vessels in coastal shipping, as well as hydrography and mapping systems worldwide. Its
Cezary Specht
doaj   +2 more sources

Autonomous “Figure-8” Flights of a Quadcopter: Experimental Datasets

open access: yesData, 2019
This article describes the data acquired from multiple flights of a custom-built quadcopter. The Quadcopter was programmed to fly a pre-defined “Figure-8” flight path, at a constant altitude.
Srikanth Gururajan, Ye Bai
doaj   +2 more sources

Performance analysis and improvement of the ultra-wide band localization system

open access: yesSakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2017
With the very wide spectrum and high resolution characteristics, ultra-wideband (UWB) communication technique is chosen various indoor localization.
Kerem Küçük
doaj   +2 more sources

Biotelemetry marches on: A cost-effective GPS device for monitoring terrestrial wildlife. [PDF]

open access: yesPLoS ONE, 2018
The availability of low-cost wildlife trackers increases the capacity to collect valuable ecological data when research budgets are limited. We converted a commercially available global positioning system (GPS) product into a low-cost tracking device ...
Manuela Fischer   +6 more
doaj   +3 more sources

Quantification Method for the Uncertainty of Matching Point Distribution on 3D Reconstruction

open access: yesISPRS International Journal of Geo-Information, 2020
Matching points are the direct data sources of the fundamental matrix, camera parameters, and point cloud calculation. Thus, their uncertainty has a direct influence on the quality of image-based 3D reconstruction and is dependent on the number, accuracy,
Yuxia Bian   +5 more
doaj   +2 more sources

A Practical and Economical Ultra-wideband Base Station Placement Approach for Indoor Autonomous Driving Systems

open access: yesJournal of Advanced Transportation, 2022
Automated valet parking (AVP) has attracted much attention as the entry point to autonomous driving. In an indoor environment, high-precision positioning systems are essential for AVP.
Shengchuan Jiang   +4 more
doaj   +2 more sources

An evaluation of the accuracy and performance of lightweight GPS collars in a suburban environment. [PDF]

open access: yesPLoS ONE, 2013
The recent development of lightweight GPS collars has enabled medium-to-small sized animals to be tracked via GPS telemetry. Evaluation of the performance and accuracy of GPS collars is largely confined to devices designed for large animals for ...
Amy L Adams   +3 more
doaj   +2 more sources

Deployment Strategy Analysis for Underwater Geodetic Networks

open access: yesJournal of Marine Science and Engineering, 2023
Seafloor geodetic network (SGN) is the foundation for building an underwater positioning, navigation and timing (PNT) system. Traditional network deployment mainly focuses on the deployment of underwater sensor network nodes.
Wei Huang   +3 more
doaj   +2 more sources

A case report assessing the utility of a low-cost tracking GPS device for monitoring terrestrial mammal movements

open access: yesAnimal Biotelemetry, 2023
Background Accurate data on animal movements can highlight behavioural and ecological issues, such as territorial interactions, barriers to migration patterns, including compromised movement corridors, or avoidance of deteriorating habitats, and disease ...
Claire Moore   +3 more
doaj   +2 more sources

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

open access: yesRemote 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   +2 more sources

Home - About - Disclaimer - Privacy