中国科学院机构知识库网格系统: 检索

Blind estimation of the modulation index of a USB waveform in TT&C signal 期刊论文 OAI收割
TELECOMMUNICATION SYSTEMS, 2022, 页码: 11
作者: Chu, Zi-Yue; Zou, De-Cai; Wang, Xue; Zhao, Hang; Shang, Peng

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收藏 | 浏览/下载：39/0 | 提交时间：2022/08/15

Electronic reconnaissance Tracking telemetry and command (TT&C) Unified S-Band (USB) Modulation index Blind estimation

Monitoring Recent Changes in Drought and Wetness in the Source Region of the Yellow River Basin, China 期刊论文 OAI收割
WATER, 2022, 卷号: 14, 期号: 6, 页码: 18
作者: Ren, Yanqun; Liu, Jinping; Shalamzari, Masoud Jafari; Arshad, Arfan; Liu, Suxia

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收藏 | 浏览/下载：27/0 | 提交时间：2022/09/21

standardized precipitation index reconnaissance drought index drought and wet changes multiple time scales source region of the Yellow River Basin

Monitoring Recent Changes in Drought and Wetness in the Source Region of the Yellow River Basin, China 期刊论文 OAI收割
WATER, 2022, 卷号: 14, 期号: 6, 页码: 18
作者: Ren, Yanqun; Liu, Jinping; Shalamzari, Masoud Jafari; Arshad, Arfan; Liu, Suxia

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收藏 | 浏览/下载：18/0 | 提交时间：2022/09/21

standardized precipitation index reconnaissance drought index drought and wet changes multiple time scales source region of the Yellow River Basin

Mineral composition of the Martian Gale and Nili Fossae regions from Mars Reconnaissance Orbiter CRISM images 期刊论文 OAI收割
PLANETARY AND SPACE SCIENCE, 2018, 卷号: 163, 页码: 97-105
作者: Xue, Yansong; Yang, Yi; Yu, Le

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收藏 | 浏览/下载：30/0 | 提交时间：2019/05/23

Mineral Component Mars Reconnaissance Orbiter Crism

Ground target geolocation based on digital elevation model for airborne wide-area reconnaissance system 期刊论文 OAI收割
Journal of Applied Remote Sensing, 2018, 卷号: 12, 页码: 18
作者: Qiao, C.; Ding, Y. L.; Xu, Y. S.; Xiu, J. H.

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收藏 | 浏览/下载：22/0 | 提交时间：2019/09/17

aerial remote sensing wide-area reconnaissance system geolocation digital elevation model elliptical Earth model moving average filtering cooperative localization Environmental Sciences & Ecology Remote Sensing Imaging Science & Photographic Technology

Development situation and trend of domestic and international aerial mapping camera (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Mechatronic Science, Electric Engineering and Computer, MEC 2011, August 19, 2011 - August 22, 2011, Jilin, China
Ming L. W.; Xue L.; Hui C. X.; Jun L. Q.

收藏 | 浏览/下载：32/0 | 提交时间：2013/03/25

In the modern military affairs especially in the complex field the acquirement of real-time battlefield information and intelligence is getting more and more important most of this work is completed by aerial reconnaissance or aerial mapping equipment. Aerial mapping camera with time-sensitive and flexible features is playing an increasingly important role in modern warfare. With the development of technology aerial mapping camera has also gone through several generations gradually from film-based type to transmission type. The theory and composition of domestic and international typical aerial mapping camera is introduced from the development situation and trend in this paper. Finally with the domestic research status the development trend of aerial mapping camera is proposed. 2011 IEEE.

Image forward motion compensation method for some aerial reconnaissance camera based on neural network predictive control (EI CONFERENCE) 会议论文 OAI收割
International Conference on Advanced Research on Computer Science and Information Engineering, CSIE 2011, May 21, 2011 - May 22, 2011, Zhengzhou, China
Zhong C.; Ding Y.; Fu J.

收藏 | 浏览/下载：32/0 | 提交时间：2013/03/25

In this paper neural network predictive control method is used to compensate the image forward motion of a certain aerial reconnaissance camera and we have solved several problems that traditional control methods have. Firstly according to the principle of imaging we analyzed the reasons for the existence of image forward motion and established the mathematical model. Secondly we analyzed the theoretically feasibility of the method. At last simulation experiments and test are used to validate the practical feasibility. Through what we have done we conclude that neural network predictive control method can be used to compensate image forward motion for this certain camera and can make a perfect performance. 2011 Springer-Verlag.

Research on the the device of non-angular vibration for opto-electronic platform (EI CONFERENCE) 会议论文 OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Smart Structures and Materials in Manufacturing and Testing, April 26, 2010 - April 29, 2010, Dalian, China
An Y.; Song C.-P.; Kuang R.-J.; Jin G.

收藏 | 浏览/下载：40/0 | 提交时间：2013/03/25

The opto-electronic platform is the main equipment for aviation reconnaissance. It is a surveillance system with the function of search recognition orientation and tracking by opto- electronic instruments. It is made up of opto-electronic instruments which are used to get high quality image and stabilization tracking system to control stabilization and gesture of platform for exact tracking. The opto-electronic platform purpose is to achieve high quality image. Besides the impact of optic system the image quality of the system is influenced greatly in the vibration environment. The research worked by Zhao peng which demonstrated the affection caused by angular vibration was worse than which caused by line vibration and what was multiplied direct ratio with plane altitude. So it is necessary to design a new device which could be used widely and has good angular vibration isolation effect. According to the theory of parallelogram the non-angular vibration device had been designed with spatial links and the theory of non-angular vibration was analyzed. The three-dimensional model was set with UG the analysis was done by ADAMS/vibration software. The acceleration and displacement response of the device in each direction was calculated by inspiriting it with sine wave of the acceleration in three directions and the stiffness and damp were studied. All the work prove the design principle of the device is reasonable and the device is adopted to keep the platform motion moving horizontally at the meantime the device is good at isolating vibration in all directions. 2010 SPIE.

Aerospace reconnaissance distributed system design based on WES (EI CONFERENCE) 会议论文 OAI收割
2nd International Conference on e-Business and Information System Security, EBISS2010, May 22, 2010 - May 23, 2010, Wuhan, China
作者: Wang H.; Wang H.; Wang H.; Wang H.

收藏 | 浏览/下载：35/0 | 提交时间：2013/03/25

A distributed embedded system is designed based on WES(Windows Embedded Studio) which is used to improve the stability and reliability of the aerospace optoelectronic reconnaissance platform and enhance the visualization in the complicated natural environment. This system is combined with the component of distributed data communication the component of CCD image acquisition and transfers all of which are designed on the hardware of PM401 by WES. Then plying the EWF technology integrate the stable and reliable distributed system. At last using NHPP mathematic model analyze the stability and reliability of the system. The results show that the stability and the reliability of this distributed system works well up to 94.61%. 2010 IEEE.

Analysis of laser jamming to satellite-based detector (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging, June 17, 2009 - June 19, 2009, Beijing, China
作者: Guo L.-H.; Guo R.-H.

收藏 | 浏览/下载：34/0 | 提交时间：2013/03/25

The reconnaissance satellite communication satellite and navigation satellite used in the military applications have played more and more important role in the advanced technique wars and already become the significant support and aid system for military actions. With the development of all kinds of satellites anti-satellite laser weapons emerge as the times require. The experiments and analyses of laser disturbing CCD (charge coupled detector) in near ground have been studied by many research groups but their results are not suitable to the case that using laser disturbs the satellite-based detector. Because the distance between the satellite-based detector and the ground is very large it is difficult to damage it directly. However the optical receive system of satellite detector has large optical gain so laser disturbing satellite detector is possible. In order to determine its feasibility the theoretical analyses and experimental study are carried out in the paper. Firstly the influence factors of laser disturbing satellite detector are analyzed in detail which including laser power density on the surface of the detector after long distance transmission and laser power density threshold for disturbing etc. These factors are not only induced by the satellite orbit but dependence on the following parameters: laser average power in the ground laser beam quality tracing and aiming precision and atmospheric transmission. A calculation model is developed by considering all factors which then the power density entering into the detector can be calculated. Secondly the laser disturbing experiment is performed by using LD (laser diode) with the wavelength 808 nm disturbing CCD 5 kilometer away which the disturbing threshold value is obtained as 3.5510-4mW/cm2 that coincides with other researcher's results. Finally using the theoretical model the energy density of laser on the photosensitive surface of MSTI-3 satellite detector is estimated as about 100mW/cm2 which is largely exceed the disturbing threshold and therefore verify the feasibility of using this kind of laser disturbing the satellite-based detector. According to the results. using the similar laser power density absolutely saturate the requirements to laser disturbing satellite-based detector. If considering the peak power of pulsed laser even decrease laser average power it is also possible to damage the detector. This result will provide the reliable evidences to evaluate the effect of laser disturbing satellite-based detector. 2009 SPIE.