Results 1 to 10 of about 547,627 (188)

Analysis of pointing accuracy on petanque standing position: Performance and accuracy

Journal Sport Area, 2022
In developing the game of pétanque, it is necessary to master good basic techniques because this is the initial capital of an athlete to develop his game. Good mastery of basic techniques can also improve performance optimally.
Fajar Awang Irawan, Dina Syarafina Ghassani, Dhias Fajar Widya Permana, Buyung Kusumawardhana, Hananto Tyas Saputro, Syarief Fajaruddin, Rex John G Bawang   +6 more
doaj   +2 more sources

High-Precision Calibration Technology and Experimental Verification for Dual-Axis Laser Communication Systems [PDF]

Sensors
With the continuous improvement of remote sensing satellite resolution, laser communication technology has gained significant traction. The pointing accuracy of ground-based laser communication terminals is critical for the stability of satellite–ground ...
Wenyan Li, Xiaolei Zhang, Lei Zhang, Xiang Wei, Guoxi Luo, Peng Zhang, Zhipeng Xue   +6 more
doaj   +2 more sources

Preliminary Pointing Bias Calibration of ZY3-03 Laser Altimeter [PDF]

Journal of Geodesy and Geoinformation Science, 2021
ZiYuan3-03 (ZY3-03) satellite was launched on July 25, 2020, equipped with China’s second-generation laser altimeter for earth observation. In order to preliminarily evaluate the in-orbit performance of the ZY3-03 laser altimeter, the pointing ...
Junfeng XIE,Ren LIU,Yongkang MEI,Wei LIU,Jianping PAN
doaj   +1 more source

Analysis and correction of geometrical error-induced pointing errors of a space laser communication APT system

International Journal of Optomechatronics, 2021
The geometrical error caused pointing error is an inevitable problem in space satellite laser communication terminals which can affect the pointing accuracy of the APT (acquisition pointing and tracking) system greatly, in order to facilitate the ...
Furui Zhang, Ping Ruan, Junfeng Han, Yao Li   +3 more
doaj   +1 more source

A Separate Calibration Method of Laser Pointing and Ranging for the GF-7 Satellite Laser That Does Not Require Field Detectors

Remote Sensing, 2022
Satellite laser altimeters have been widely used in the surveying, mapping, forestry, and polar regions and by other industries due to their excellent elevation measurement accuracy.
Ren Liu, Junfeng Xie, Chaopeng Xu, Junze Zeng, Fan Mo, Xiaomeng Yang   +5 more
doaj   +1 more source

Rotating Lorentz Force Magnetic Bearings’ Dynamics Modeling and Adaptive Controller Design

Sensors, 2023
To address the issues of our agile satellites’ poor attitude maneuverability, low pointing stability, and pointing inaccuracy, this paper proposes a new type of stabilized platform based on seven-degree-of-freedom Lorentz force magnetic levitation ...
Feiyu Chen, Weijie Wang, Shengjun Wang
doaj   +1 more source

Modeling and Correction of Pointing Errors in Gimbals-Type Optical Communication Terminals on Motion Platforms

IEEE Photonics Journal, 2021
In free-space optical (FSO) communication, high-precision pointing is a critical technology required for rapid acquisition to reduce link establishment time and increase communication time.
Chao Peng, Dong He, Yuankang Wang, Yongmei Huang, Xiang Liu, Liangzhu Yuan, Yangjie Xu, Jiaming Lei, Haotong Ma   +8 more
doaj   +1 more source

Impact of Vestibular Stimulation at Powerline Frequency on Human Pointing Accuracy

IEEE Access, 2022
Background: Electric vestibular stimulations (EVS) up to 300 Hz trigger vestibular myogenic responses. Interestingly, 300 Hz is the upper limit of the so called extremely low-frequency magnetic fields (ELF-MF) range found within the 2010 guidelines ...
Nicolas Bouisset, Andres Carvallo, Perrine Dumur, Sofiane Ramdani, Alexandre Legros   +4 more
doaj   +1 more source

Development of an Eye-Gaze Input System With High Speed and Accuracy through Target Prediction Based on Homing Eye Movements

IEEE Access, 2021
In this study, a method to predict a target on the basis of the trajectory of eye movements and to increase the pointing speed while maintaining high predictive accuracy is proposed.
Atsuo Murata, Toshihisa Doi, Kazushi Kageyama, Waldemar Karwowski   +3 more
doaj   +1 more source

A sun-tracking method to improve the pointing accuracy of weather radar [PDF]

Atmospheric Measurement Techniques, 2012
Accurate positioning of data collected by a weather radar is of primary importance for their appropriate georeferencing, which in turn makes it possible to combine those with additional sources of information (topography, land cover maps, meteorological ...
X. Muth, M. Schneebeli, A. Berne
doaj   +1 more source