POINTING

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Emitter Beam State Sensing Based on Convolutional Neural Network and Received Signal Strength
《Journal of Shanghai Jiaotong university(Science)》2024年第6期1017-1022,共6页JIANG Yilin LI Xiang ZHANG Haoping 
the National Natural Science Foundation of China(No.62071137);the Fundamental Research Funds for Central Universities(No.3072021CF0816);the Key Laboratory of Advanced Marine Communication and Information Technology,Ministry of Industry and Information Technology Project(No.AMCIT2102-04)。
In this paper,a classification method based on convolutional neural network(CNN)and received signal strength(RSS)is proposed to solve the problem of non-cooperative emitter beam state sensing in electrical situational...
关键词：electromagnetic situation awareness convolutional neural network(CNN) received signal strength(RSS) emitter beam pointing 
Configuration Design and Size Optimization of a High-Precision Novel Parallel Pointing Mechanism Based on Interference Separation
《Chinese Journal of Mechanical Engineering》2024年第5期365-386,共22页Sen Wang Shihua Li Xueyan Han Jiahao Wei Xueyuan Gao Hongyu Xu 
Supported by the National Natural Science Foundation of China(52275032);the Natural Science Foundation of Hebei Province(E2022203077);the Hebei Provincial Science and Technology Plan(22371801D);the Hebei Provincial Science and Technology Research and Development Program-Central Guidance for Local Science and Technology Development Fund(246Z1818G).
Pointing mechanism is widely used in aerospace field,and its pointing accuracy and stability have high requirements.The pointing mechanism will be affected by external interference when it works.In order to eliminate ...
关键词：Pointing mechanism Interference separation Double-layer parallel mechanism Force compensation coefficient Multi-objective optimization 
Experimental study on the effect of wind on pointing accuracy of antenna structures
《Astronomical Techniques and Instruments》2024年第5期284-294,共11页Li Fu Wang Li Lingling Wang Wen Guo Qinghui Liu Zhiqiang Shen Xu Wang Haiming Liu 
provided by the TMRT operators during the observations.This work was supported by the National Key Basic Research and Development Program(2018YFA0404702);the National Natural Science Foundation of China(U1631114,11873015,and 11203062);the CAS Key Technology Talent Program,the Knowledge Innovation Program of CAS(KJCX1-YW-18);the Scientific Program of Shanghai Municipality(08DZ1160100);the Key Laboratory for Radio Astronomy of CAS,the Key Laboratory of Planetary Sciences of CAS,and the CAS Scholarship.
Wind loads have instantaneity and turbulence characteristics that will lead to pointing errors in antenna structures,and these errors cannot be ignored in high-frequency observations.Using the Tianma 65 m radio telesc...
关键词：ACCELEROMETER Double integral Pointing error Bandpass filtering 
Staring-imaging satellite pointing estimation based on sequential ISAR images
《Chinese Journal of Aeronautics》2024年第8期261-276,共16页Canyu WANG Libing JIANG Weijun ZHONG Xiaoyuan REN Zhuang WANG 
Pointing estimation for spacecraft using Inverse Synthetic Aperture Radar(ISAR)images plays a significant role in space situational awareness and surveillance.However,feature extraction and cross-range scaling of ISAR...
关键词：Staring-imaging Agile satellite Inverse Synthetic Aperture Radar(ISAR) Pointing estimation Cross-range scaling 
Pointing Fingers,Missing Solutions
《Beijing Review》2024年第24期24-24,共1页Danny Haiphong 
It is no secret that drug addiction is a major problem in the United States.When it comes to opioids,the crisis has become increasingly deadly.Over 112,000 fatal overdoses occurred in the U.S.in 2023.The potent synthe...
关键词：consequences CONVENIENT ATTEMPTED 
A microphysical investigation of different convective cells during the precipitation event with sustained high-resolution observations
《Frontiers of Earth Science》2024年第2期279-295,共17页Ziheng HUANG Zheng RUAN Debin SU 
supported by the National Natural Science Foundation of China(Grant No.41975046);the Basic Research Fund of CAMS(No.2023Z008);the National Key Research and Development Program of China(No.2017YFC1501703).
The growth and breakup processes of raindrops within a cloud influence the rain intensity and the sizes of raindrops on the surface.The Doppler velocity spectrum acquired by a vertically pointing radar(VPR)contains in...
关键词：cloud microphysics convective systems convective cell vertically pointing radar observations Doppler velocity spectrum 
Modeling and analysis of pointing error for non-landing vehicle-mounted photoelectric theodolite
《Optoelectronics Letters》2024年第5期294-298,共5页GAO Qingjia WANG Chong LIU Yanjun WANG Xiaoming WU Tongbang ZHANG Haoyuan 
supported by the National Natural Science Foundation of China (No.51675506)。
In order to achieve high accuracy measurement for non-landing vehicle-mounted photoelectric theodolite(NVPT) with continuous zoom optical system, a theoretical model of pointing error is presented. Starting with the w...
关键词：ERROR mounted SYSTEM 
High-speed free-space optical communication using standard fiber communication components without optical amplification
《Advanced Photonics Nexus》2023年第6期1-6,共6页Hua-Ying Liu Yao Zhang Xiaoyi Liu Luyi Sun Pengfei Fan Xiaohui Tian Dong Pan Mo Yuan Zhijun Yin Guilu Long Shi-Ning Zhu Zhenda Xie 
supported by the National Key R&D Program of China(Grant No.2019YFA0705000);the Leading-Edge Technology Program of Jiangsu Natural Science Foundation(Grant No.BK20192001);the National Natural Science Foundation of China(Grant Nos.51890861,11690033,and 62293523);the Zhangjiang Laboratory(Grant No.ZJSP21A001);the Key R&D Program of Guangdong Province(Grant No.2018B030329001);the National Postdoctoral Program for Innovative Talents(Grant No.BX2021122);the China Postdoctoral Science Foundation(Grant No.2022M711570);the Fundamental Research Funds for the Central Universities(Grant No.2022300158);the Jiangsu Funding Program for Excellent Postdoctoral Talent.
Free-space optical communication(FSO)can achieve fast,secure,and license-free communication without physical cables,providing a cost-effective,energy-efficient,and flexible solution when fiber connection is unavailabl...
关键词：free-space optical communication acquisition pointing and tracking system field-deployable system 
Insight-HXMT on-orbit thermal control status and thermal deformation impact analysis
《Radiation Detection Technology and Methods》2023年第3期337-349,共13页Ai-Mei Zhang Yi-Fan Zhang Jin-Yuan Liao Yu-Peng Xu Yu-Sa Wang Wen-Bo Luo Yu-Peng Zhou Zhi-Ying Qian Xiao-Bo Li Fang-Jun Lu Shuang-Nan Zhang Li-Ming Song Cong-Zhan Liu Fan Zhang Jian-Yin Nie Juan Wang Sheng Yang Tong Zhang Xiao-Jing Liu Rui-Jie Wang Xu-Fang Li Yi-Fei Zhang Zheng-Wei Li Xue-Feng Lu He Xu Di Wu 
This work was based on the data from Insight-HXMT mission,a project funded by the China National Space Administration(CNSA)and the Chinese Academy of Sciences(CAS);We gratefully acknowledge the support from the National Program on Key Research and Development Project(Grant No.2021YFA0718500)from the Ministry of Science and Technology of China(MOST);All authors appreciate the supports from the National Natural Science Foundation of China under Grants 12273043,U1838201,U1838202,U1938102,and U1938108;This work was partially supported by International Partnership Program of Chinese Academy of Sciences(Grant No.113111KYSB20190020);Appreciate Zeyu Song from IHEP for meticulous translation and revision.Appreciate Yongping Li from IHEP for helping with star sensor quaternion calculation.
Purpose The Hard X-ray Modulation Telescope is China’s first X-ray astronomy satellite launched on June 15,2017,dubbed Insight-HXMT.Active and passive thermal control measures are employed to keep devices at suitable...
关键词：X-ray Insight-HXMT Thermal control Temperature Star sensor data POINTING PSF 
Performance Analysis and Prediction for a Free-Space Optical Communication System under Foggy Absorption
《Journal of Communications and Information Networks》2023年第3期231-238,共8页Jialin Wang Guanjun Xu Xiaozong Yu Zhaohui Song 
This research was funded by the National Natural Science Foundation of China under Grants 62271202,62027802,and 61831008;the Key Research and Development Program of Zhejiang Province under Grant 2023C01003;in part by the Open Foundation of State Key Laboratory of Integrated Services Networks Xidian University under Grant ISN23-01.
We analyzed the performance of a freespace optical(FSO)system in this study,considering the combined effects of atmospheric turbulence,fog absorption,and pointing errors.The impacts of atmospheric turbulence and foggy...
关键词：FSO communication foggy absorption Fisher-Snedecor F-distribution pointing errors deep learning DNN 
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