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The correlation of flare's location on solar disc and the sudden increase of total electron content

Chinese Science Bulletin 2002年第1期47卷 82-85页

作者： ZHANG Donghe, XIAO Zuo & CHANG QingDepartment of Geophysics, Peking University, Beijing 100871, china qingdao research center, china research insitute of radio-wave propagation, qingdao 266071, china Department of Electronic Engineering, Beijing Universit Department of Geophysics Peking University Beijing China qingdao research center China Research Insitute of Radio-wave Propagation Qingdao China Department of Electronic Engineering Beijing University of Aeronautics and Astronautics Beijing China

The correlation of flare’s location on solar disc with the value of sudden increase of total electron content is analyzed with flare’s parameters observed by GOES satellite from 1997 to 1999 and total electron content derived from GPS data observed by international GPS Service for Geo-dynamics. It is found that, besides the flare’s maximum X-ray flux, flare’s location on solar disc has some relation with the value of SITEC during the flare. The ionospheric response to a flare with a smaller maximum X-ray flux and nearer angular distance to the Sun’s central meridian line may be stronger than that of the flare with a larger maxi-mum X-ray flux and far angular distance. To the flares with the same class of maximum X-ray flux, the nearer the angu-lar distance to the Sun’s meridian, the stronger the ionospheric response.

关键词： flare SITEC GPS.

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Correlative ionospheric disturbances in the sunlit hemisphere during the flare on July 14,2000

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Chinese Science Bulletin 2002年第12期47卷 975-977页

作者： ZHANG Donghe & XIAO ZuoDepartment of Geophysics, Peking University, Beijing 100871, china qingdao research center, Chinese research Institute of radio-wave propagation, qingdao 266071, china center for Space Science and Applied research, Chinese Academy o Department of Geophysics Peking University Beijing China qingdao research center Chinese Research Institute of Radio-wave Propagation Qingdao China center for Space Science and Applied research Chinese Academy of Sciences Beijing China

Using GPS data obtained from GPS sites located on the sunlit hemisphere during the flare on July 14, 2000, the ionospheric response to the flare was analyzed. A kind of tiny correlative ionospheric fluctuations were revealed from the temporal total electron content (TEC) curves derived from GPS measurements, and the values of this kind of disturbances are about 1015 m-2. A comparative analysis of these disturbances and soft X-ray flux detected at GOES satellite during the flare is done. It is found that this kind of disturbances revealed in the temporal TEC curves did occur in a very large area of sunlit ionosphere and its behavior is mainly controlled by the characteristics of the flare’s extra radiation. Because the similar fluctuations are not found in the curve of soft X-ray flux, it is concluded that the flare extra radiation in EUV band should have corresponding fluctuations and it is the fluctuations that cause the TEC disturbances. The height, where the disturbances occur, should be in the F

关键词： GPS TEC flare correlative disturbance.

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基于marble的等值线显示研究

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计算机科学与技术汇刊（中英文版） 2016年第1期5卷 9-13页

作者：程延锋郭延波杨东升张连迎陈跃中国电波传播研究所山东青岛266107

随着三维可视化技术的高速发展和广泛应用,很多应用工程领域需要三维地理信息系统显示等值线.据此本文介绍了在marble上高效实现等值线.实例结果表明,基于marble的等值线显示真实、形象和直观.

关键词：等值线 marble 地域网格 Qt

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