Results 21 to 30 of about 647,850 (296)
Development of Precise Point Positioning Method Using Global Positioning System Measurements [PDF]
Journal of Astronomy and Space Sciences, 2011 Precise point positioning (PPP) is increasingly used in several parts such as monitoring of crustal movement and maintaining an international terrestrial reference frame using global positioning system (GPS) measurements.
Byung-Kyu Choi +4 more
doaj +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
Landmark Attribute Analysis for a High-Precision Landmark-Based Local Positioning System
IEEE Access, 2021 GPS signals are not reliable in urban canyons or inside tunnels. In those situations, accurate local positioning is possible through local landmarks. This paper presents the potential accuracy of such a landmark-based local positioning system and the ...
Juhui Gim, Changsun Ahn, Huie Peng
doaj +1 more source
Remote Sensing, 2022 The high-precision geometric positioning of optical remote sensing satellites is the prerequisite to determine the application capability of satellite image products.
Qingyang Li +5 more
doaj +1 more source
Progress towards on-chip single photon sources based on colloidal quantum dots in silicon nitride devices [PDF]
, 2014 New results on integration of colloidal quantum dots (QDs) into SiN microstructures are reported, including QD positioning with nanometric accuracy and the efficient coupling of their emission to waveguides and cavities.
Bisschop, Suzanne +6 more
core +2 more sources
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 +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
Visible light communications-based indoor positioning via compressed sensing [PDF]
, 2018 This paper presents an approach for visible light communication-based indoor positioning using compressed sensing. We consider a large number of light emitting diodes (LEDs) simultaneously transmitting their positional information and a user device ...
Ajmani, Manisha +3 more
core +3 more sources
Vìsnik Nacìonalʹnogo Tehnìčnogo Unìversitetu Ukraïni Kììvsʹkij Polìtehnìčnij Ìnstitut: Serìâ Radìotehnìka, Radìoaparatobuduvannâ, 2021 The article shows the relevance of the problem of development and analysis of algorithms for tracking small-sized UAVs according to video surveillance.
A. O. Herasymenko, S. Ya. Zhuk
doaj +1 more source
A Vessel Position Precision Analysis Based on a Two-Star Combined Approach
Journal of Marine Science and EngineeringTraditional 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 +4 more
doaj +1 more source