Results 1 to 10 of about 701,425 (185)

Pointing Error Correction for a Moving-Platform Electro-Optical Telescope Using an Optimized Parameter Model [PDF]

Sensors, 2023
This paper proposes a new optimized parameter model that enhances the pointing accuracy of moving-platform electro-optical telescopes (MPEOTs). The study begins by comprehensively analyzing the error sources, including the telescope and the platform ...
Yan He, Yahui Zhang, Xiaohua Feng, Shuwei Deng, Zhiwen Wang   +4 more
doaj   +4 more sources

Pointing Error Correction for Vehicle-Mounted Single-Photon Ranging Theodolite Using a Piecewise Linear Regression Model [PDF]

Sensors
Pointing error is a critical performance metric for vehicle-mounted single-photon ranging theodolites (VSRTs). Achieving high-precision pointing through processing and adjustment can incur significant costs.
Qingjia Gao, Chong Wang, Xiaoming Wang, Zhenyu Liu, Yanjun Liu, Qianglong Wang, Wenda Niu   +6 more
doaj   +4 more sources

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   +2 more sources

Analysis of the Effect of Antenna Pointing Error Caused by Satellite Perturbation on Space Terahertz Communication

Applied Sciences, 2022
The terahertz frequency band has the advantages of having a large bandwidth, narrow beam, strong penetration, and high security, and is an important direction for the frequency expansion of next-generation satellite communications.
Yuanzhi He, Chensheng Ma
doaj   +3 more sources

Efficient MIMO Configuration for Bi-Directional Vertical FSO Link with Multiple Beam Induced Pointing Error [PDF]

Sensors, 2022
We proposed the statistical misalignment model and the power-efficient configuration of transceivers for bi-directional multi-input and multi-output (MIMO) based vertical free space optical (FSO) links.
Sung-Jin Kim, Sang-Kook Han
doaj   +2 more sources

Seeing your error alters my pointing: observing systematic pointing errors induces sensori-motor after-effects. [PDF]

PLoS ONE, 2011
During the procedure of prism adaptation, subjects execute pointing movements to visual targets under a lateral optical displacement: as consequence of the discrepancy between visual and proprioceptive inputs, their visuo-motor activity is characterized ...
Roberta Ronchi, Patrice Revol, Masahiro Katayama, Yves Rossetti, Alessandro Farnè   +4 more
doaj   +4 more sources

A deep learning approach for predicting the antenna pointing error caused by transmission faults with simulation data [PDF]

Scientific Reports
Reflector antenna has been widely used in deep space exploration, radar warning, and other fields, all of which requires high pointing accuracy. The antenna elevation bearings are the key component that guarantees its pointing accuracy, while any ...
Lihui Chen, Song Xue, Peiyuan Lian, Qian Xu, Meng Wang, Congsi Wang   +5 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

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

MGF Methods for Fixed and Gain Saturated Optically Preamplified FSO Links Impaired by Misalignments and Atmospheric Turbulence

Journal of Microwaves, Optoelectronics and Electromagnetic Applications, 2022
The Gaussian approximation is commonly used to evaluate the performance of free space optical communication systems. However, other performance evaluation methods such as the saddle point approximation, Chernoff bound and the modified Chernoff bound have
Jeremiah Oluwatosin Bandele
doaj   +1 more source