中国科学院机构知识库网格系统: 检索

Prediction of geosynchronous electron fluxes using an artificial neural network driven by solar wind parameters 期刊论文 OAI收割
ADVANCES IN SPACE RESEARCH, 2023, 卷号: 71, 期号: 1, 页码: 275-285
作者: Wang, Jianhang; Guo, Deyu; Xiang, Zheng; Ni, Binbin; Liu, Yangxizi

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收藏 | 浏览/下载：27/0 | 提交时间：2023/03/30

Flux prediction Artificial neural network Geosynchronous orbit Solar wind parameters

Contribution analysis of inter-satellite ranging observation to BDS-2 satellite orbit determination based on regional tracking stations 期刊论文 OAI收割
ACTA ASTRONAUTICA, 2019, 卷号: 164, 页码: 297-310
作者: Zhang, Rui; Tu, Rui; Fan, Lihong; Zhang, Pengfei; Liu, Jinhai

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收藏 | 浏览/下载：18/0 | 提交时间：2020/11/11

BDS satellite orbit determination China regional ground tracking stations Inter-satellite ranging observation Contribution analysis Dynamic parameters dilution of precision Satellite position dilution of precision

Simulation of number and distribution of Compass occultation events 期刊论文 OAI收割
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 2013, 卷号: 56, 期号: 8, 页码: 2522-2530
作者: Wang Xian-Yi; Sun Yue-Qiang; Bai Wei-Hua; Du Qi-Fei; Wang Dong-Wei

收藏 | 浏览/下载：24/0 | 提交时间：2014/04/30

Compass navigation system Low Earth Orbit Occultation Orbit parameters Simulation

Theoretical studies of EPR parameters and defect structures for Ni2+ ions in corundum 期刊论文 OAI收割
Physica B-Condensed Matter, 2013, 卷号: 408, 页码: 169-174
W. Fang; Q. W. Wang; W. Y. Yang; W. C. Zheng

收藏 | 浏览/下载：25/0 | 提交时间：2013/12/24

Fourth-order perturbation formulae Two spin-orbit coupling parameter Defect structure [NiO6](10-) cluster paramagnetic resonance absorption spin-hamiltonian parameters trigonal crystal-field centers pressure nickel al2o3 3d(8)

Theoretical investigation of optical spectra and covalent effect of Cr4+ in Y2Ti2O7 and Y2Sn2O7 期刊论文 OAI收割
Physica B-Condensed Matter, 2012, 卷号: 407, 期号: 12, 页码: 2344-2346
W. L. Feng; J. Y. Xue

收藏 | 浏览/下载：21/0 | 提交时间：2013/02/05

Optical spectra Covalent effect Two spin-orbit coupling parameters model Cr4+ Y2Ti2O7 and Y2Sn2O7 atomic screening constants tetragonal distortion scf functions crystal epr pyrochlores parameters growth sites

Design and calibration of the solar irradiance monitor (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, May 24, 2011 - May 26, 2011, Beijing, China
作者: Yang D.-J.; Gong C.-H.; Wang Y.-P.; Ye X.; Fang W.

收藏 | 浏览/下载：27/0 | 提交时间：2013/03/25

The solar irradiance monitor (SIM) with the design accuracy of 5 used to monitor the secular changes of the total solar irradiance on FY-3 satellite takes the sun-scanning measurement method on-orbit. Compared to the sun-tracking measurement method this method simplifies the structure and cuts the cost but the measuring accuracy is affected by the sun-synchronous orbit sunlight incidence angle and the installing angle of the SIM in the satellite. Through the ground calibration experiment studies on the affection of different sunlight incidence angles to the measurement accuracy. First by the satellite tool kit (STK) simulation software simulates the orbital parameters of the sun-synchronous satellite and calculates the Sun ascension and declination at any time. By the orbit coordinate transformation matrix gets the components of the Sun vectors to the axes of the satellite and base on the components designs the field of view and the installing angles of the SIM. Then designs and completes the calibration experiment to calibrate the affection of the incidence angles. Selecting 11 different angles between the sunlight and the satellite X-axis measures the total solar irradiance by the SIM at each angle and compares to the irradiances of the SIAR reference radiometers and gets the coefficient curves of the three channels of the SIM. Finally by the quadratic fitting gets the correction equations on the incidence angles: R 1=5.7110-52 -2.45310 -3+1.0302 R2=2.8410-5-1. 96510-3+1.0314 and R3 =1.7210 -52-4.18410-4+0.9946. The equations will aimprove the on-orbit measurement accuracy of the solar irradiance and are very important to the on-orbit data processing after the satellite launched. 2011 SPIE.

Theoretical investigation for the EPR g-factors of the mixed ground state in NaCl: Ag(2+) crystals 期刊论文 OAI收割
Spectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy, 2011, 卷号: 79, 期号: 5, 页码: 1308-1310
W. L. Li; X. M. Li; W. L. Feng; W. J. Yang; C. Y. Tao

收藏 | 浏览/下载：26/0 | 提交时间：2012/04/13

Electron paramagnetic resonance Double spin-orbit coupling model NaCl Ag(2+) spin-hamiltonian parameters atomic screening constants paramagnetic-resonance single-crystals optical-spectra scf functions ions electrons sites v3+

Theoretical Explanations of the g Factors for Ni(3+) Ions in KMgF(3) and CsCaF(3) Crystals 期刊论文 OAI收割
Spectroscopy Letters, 2010, 卷号: 43, 期号: 1, 页码: 40912
L. He; W. C. Zheng; S. R. Zhang

收藏 | 浏览/下载：37/0 | 提交时间：2012/04/13

crystal- and ligand-field theory CsCaF3 electron paramagnetic resonance KMgF3 Ni3+ spin transition spin-hamiltonian parameters atomic screening constants other-orbit interactions electronic spectra scf functions field mgo transition distortion complexes

Study on the absorption spectra and electron paramagnetic resonance g factors of RbNiCl(3) single crystal 期刊论文 OAI收割
Physica B-Condensed Matter, 2010, 卷号: 405, 期号: 18, 页码: 3831-3833
W. L. Feng; X. M. Li; T. Li; L. C. Pu

收藏 | 浏览/下载：25/0 | 提交时间：2012/04/13

Crystal- and ligand-field theory Optical spectra Electron paramagnetic resonance (EPR) Spin-orbit coupling atomic screening constants optical-spectra scf functions spin parameters field epr csnicl3 systems chain

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.; Wang S.-W.

收藏 | 浏览/下载：29/0 | 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.