Results 41 to 50 of about 7,723,935 (379)

Effect of Outlier Removal from Temporal ASF Corrections on Multichain Loran Positioning Accuracy [PDF]

International Conference on Control, Automation and Systems, 2020
The widely used global navigation satellite systems (GNSSs) are vulnerable to radio frequency interference (RFI). Long-range navigation (Loran), a terrestrial navigation system, can compensate for this weakness; however, it suffers from low positioning ...
Jongmin Park, P. Son, Woohyun Kim, J. Rhee, Jiwon Seo   +4 more
semanticscholar   +1 more source

A Study on the Application of WSN Positioning Technology to Unattended Areas

IEEE Access, 2019
Wireless sensor network (WSN) is a kind of self-organized network that plays a critical role in the rescue and relief work of some unattended areas in recent years.
Yanhui Lv, Yong Liu, Jiangfeng Hua
doaj   +1 more source

Increased Accuracy to c‐Fos‐Positive Neuron Counting [PDF]

BioMed Research International, 2021
There is not a described method to count the core label of c‐Fos‐positive neurons, avoiding false‐positive and false‐negative results. The aim of this manuscript is to provide guidelines for a secure and accurate method to calculate a threshold to select which core of c‐Fos‐positive neurons marked by immunofluorescence has to be scored.
Wellington José da Silva, José Rodrigo Santos Silva, Jullyana de Souza Siqueira Quintans, Waldecy de Lucca Junior   +3 more
openaire   +2 more sources

Positioning performance analysis on combined GPS/BDS precise point positioning

Geodesy and Geodynamics, 2020
Combining the observation data from five Multi-GNSS Experiment (MGEX) stations with the precise orbit and clock products from Global Positioning System (GPS) and BeiDou Navigation Satellite System (BDS), we studied the model of combined GPS/BDS precise ...
Jing Xiong, Fei Han
doaj   +1 more source

Nanopositioning of a diamond nanocrystal containing a single NV defect center

, 2009
Precise control over the position of a single quantum object is important for many experiments in quantum science and nanotechnology. We report on a technique for high-accuracy positioning of individual diamond nanocrystals.
de Lange, G., Dmochowski, G. M., Hanson, R., Heeres, E. C., Oosterkamp, T. H., Robledo, L., van der Sar, T.   +6 more
core   +2 more sources

Positioning Accuracy Comparison of GNSS Receivers Used for Mapping and Guidance of Agricultural Machines

Agronomy, 2020
Global Navigation Satellite Systems (GNSS) allow the determination of the 3D position of a point on the Earth’s surface by measuring the distance from the receiver antenna to the orbital position of at least four satellites.
P. Catania, A. Comparetti, P. Febo, G. Morello, S. Orlando, E. Roma, M. Vallone   +6 more
semanticscholar   +1 more source

Indoor High-Precision 3D Positioning System Based on Visible-Light Communication Using Improved Whale Optimization Algorithm

Photonics, 2022
Visible-light communication (VLC) is a promising method for indoor positioning. The received signal strength algorithm is the most widely used localization algorithm in visible-light positioning (VLP) systems. However, in a VLP system, the photodiode (PD)
Xianmeng Meng, Chaochuan Jia, Cuicui Cai, Fugui He, Qing Wang   +4 more
doaj   +1 more source

Positioning of High-speed Trains using 5G New Radio Synchronization Signals [PDF]

, 2018
We study positioning of high-speed trains in 5G new radio (NR) networks by utilizing specific NR synchronization signals. The studies are based on simulations with 3GPP-specified radio channel models including path loss, shadowing and fast fading effects.
Koivisto, Mike, Levanen, Toni, Pajukoski, Kari, Renfors, Markku, Talvitie, Jukka, Valkama, Mikko   +5 more
core   +2 more sources

Assessment of Static Positioning Accuracy Using Low-Cost Smartphone GPS Devices for Geodetic Survey Points’ Determination and Monitoring

Applied Sciences, 2020
Recent developments enable to access raw Global Navigation Satellite System (GNSS) measurements of mobile phones. Initially, researchers using signals gathered by mobile phones for high accuracy surveying were not successful in ambiguity fixing. Nowadays,
M. Uradziński, M. Bakuła
semanticscholar   +1 more source

A Vessel Position Precision Analysis Based on a Two-Star Combined Approach

Journal of Marine Science and Engineering
Traditional celestial navigation mainly utilized the sextant to measure the attitude and the position contour method to calculate and resolve the vessel’s positioning problem, but these methods are not rigorous, having major deficiencies in the ...
Yulin Wu, Chao Zhuo, Tao He, Gangjun Liu, Qingqing Liu   +4 more
doaj   +1 more source