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	Doppler-robust high-spectrum-efficiency VCM-OFDM scheme for low Earth orbit satellites broadband data transmission 期刊论文 OAI收割 IET COMMUNICATIONS, 2018, 卷号: 12, 期号: 1, 页码: 35-43 作者: Li, Jionghui; Xiong, Weiming; Sun, Geng; Wang, Zhugang; Huang, Yonghui \| 收藏 \| 浏览/下载：74/0 \| 提交时间：2018/03/02 Satellite Ground Stations Satellite Links Radio Receivers Radio Transmitters Ofdm Modulation Modulation Coding Doppler Shift Filtering Theory Doppler-robust High-spectrum-efficiency Vcm-ofdm Scheme Low Earth Orbit Satellites Broadband Data Transmission High-efficiency Satellite-ground Downlink Data Transmission System Limited Spectrum Resource Dynamic Link Conditions Orbital Motion Leo Satellite Variable Coding Modulated Orthogonal Frequency Division Multiplexing Satellite On-board Transmitter Ground Station Receiver Filtered-ofdm Signal Adjustable Codmod Spectral Efficiency Physical Layer Frame Structure Doppler Frequency Shift Compensation Future Gigabit X-band Reliable Satellite-ground Downlink Transmissions
	Earth elevation map production and high resolution sensing camera imaging analysis (EI CONFERENCE) 会议论文 OAI收割 Optoelectronic Imaging and Multimedia Technology, October 18, 2010 - October 20, 2010, Beijing, China 作者: Dai L. 收藏 \| 浏览/下载：140/0 \| 提交时间：2013/03/25 The Earth's digital elevation which impacts space camera imaging has prepared and imaging has analysed. Based on matching error that TDI CCD integral series request of the speed of image motion statistical experimental methods-Monte Carlo method is used to calculate the distribution histogram of Earth's elevation in image motion compensated model which includes satellite attitude changes orbital angular rate changes latitude longitude and the orbital inclination changes. And then elevation information of the earth's surface from SRTM is read. Earth elevation map which produced for aerospace electronic cameras is compressed and spliced. It can get elevation data from flash according to the shooting point of latitude and longitude. If elevation data between two data the ways of searching data uses linear interpolation. Linear interpolation can better meet the rugged mountains and hills changing requests. At last the deviant framework and camera controller are used to test the character of deviant angle errors TDI CCD camera simulation system with the material point corresponding to imaging point model is used to analyze the imaging's MTF and mutual correlation similarity measure simulation system use adding cumulation which TDI CCD imaging exceeded the corresponding pixel horizontal and vertical offset to simulate camera imaging when stability of satellite attitude changes. This process is practicality. It can effectively control the camera memory space and meet a very good precision TDI CCD camera in the request matches the speed of image motion and imaging. 2010 SPIE.
	Influence of the TDI CCD camera takes pictures when high resolution satellite lateral swaying (EI CONFERENCE) 会议论文 OAI收割 2009 IEEE International Conference on Mechatronics and Automation, ICMA 2009, August 9, 2009 - August 12, 2009, Changchun, China 作者: Zhang L.; Zhang L.; Sun Z. 收藏 \| 浏览/下载：18/0 \| 提交时间：2013/03/25 When the satellite was swinging and taking lateral imaging the TDI CCD pixel photovoltaic charge purses transferred velocity not matched with the image motion velocity. According to the requirement of high-resolution satellite which was taking lateral imaging at a low orbit the factors that bring about the unmatched phenomenon were analysed inclusive of the Earth's rotation the Earth curvature satellite attitude change measurement error and the installation error etc. Image motion errors caused by various factors were analysed and solved and the different characters of image motion errors were synthesized. Finally the total errors on the impact of imaging system MTF was analyzed. 2009 IEEE.
	Modeling of satellite borne TDI CCD pitching imaging image motion velocity vector (EI CONFERENCE) 会议论文 OAI收割 2009 IEEE International Conference on Automation and Logistics, ICAL 2009, August 5, 2009 - August 7, 2009, Shenyang, China 作者: Zhang L.; Li S.; Zhang L. 收藏 \| 浏览/下载：14/0 \| 提交时间：2013/03/25 In order to obtain three-dimensional observation effect with single satellite borne time delay and integrate charge coupled device (TDI-CCD) pitching imaging is required. More accurate real-time image motion velocity vector computational model of space camera is also necessary to make the imaging perfect. Imaging motion velocity vector computation model must be set up on image plane at pitching imaging. According to the geometric relationship between the pitching imaging space camera and the Earth's rotation motion satellite borne TDI CCD pitching imaging motion velocity vector model is derived by mapping the ground speed to the image plane and using coordinate transformation method. The numerical simulation results show that the image velocity model can reduce deviation angle error about 33' and about 30% image motion speed error compared to traditional ground velocity model. 2009 IEEE.
	Constraint on intermediate-range gravity from earth-satellite and lunar orbiter measurements, and lunar laser ranging 期刊论文 OAI收割 INTERNATIONAL JOURNAL OF MODERN PHYSICS D, 2005, 卷号: 14, 期号: 10, 页码: 1657-1666 作者: Li, GY; Zhao, HB 收藏 \| 浏览/下载：15/0 \| 提交时间：2012/03/07 intermediate-range gravity test of inverse square law lung laser ranging earth-satellite motion lunar orbiter motion
	Constraint on intermediate-range gravity from earth-satellite and lunar orbiter measurements, and lunar laser ranging 期刊论文 OAI收割 INTERNATIONAL JOURNAL OF MODERN PHYSICS D, 2005, 卷号: 14, 期号: 10, 页码: 1657-1666 作者: Li, GY; Zhao, HB \| 收藏 \| 浏览/下载：24/0 \| 提交时间：2017/10/20 Intermediate-range Gravity Test Of Inverse Square Law Lung Laser Ranging Earth-satellite Motion Lunar Orbiter Motion