| 电离层E_S层对综合射束污染的初步分析 |
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| 引用本文： | 韩文焌,郑怡嘉,柴燕.电离层E_S层对综合射束污染的初步分析[J].中国天文和天体物理学报,1986(4). |
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| 作者姓名： | 韩文焌 郑怡嘉 柴燕 |
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| 作者单位： | 北京天文台
(韩文焌，郑怡嘉)，北京天文台(柴燕) |
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| 摘 要： | 本文考虑到干涉仪对电离层中不同尺度不规则性的滤波作用、结合密云米波综合孔径系统、提出了电离层E_(?)层是电离层不规则性影响该系统的主要根源。不规则性的尺度约在700～1000米的范围。再考虑到E_(?)层的漂移运动,提出了文中所描述的模型。用电子计算机进行了E_(?)层对综合射束污染的模拟计算,结果指出:射束主瓣的增益下降约10％,副瓣由13％增大到18％;综合射束在赤经方向出现不对称性,从而引起约0.6秒的赤经误差;射束的边缘处和两个扇形区出现了杂瓣。
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| 关 键 词： | 日地空间 电离层 电离层E层 |
A Preliminary Analysis of Pollution of Ionospheric Sporadic E Layer on Metre-wave Aperture Synthesized Beam |
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| Han Wenjun Zheng Yijia Chai Yan.A Preliminary Analysis of Pollution of Ionospheric Sporadic E Layer on Metre-wave Aperture Synthesized Beam[J].Chinese Journal of Astronomy and Astrophysics,1986(4). |
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| Authors: | Han Wenjun Zheng Yijia Chai Yan |
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| Abstract: | Considering of the filter effect of the interferometer GIL the ionospheric irregularities with various scales, and associating with the Miyun metre wave synthesis aperture system, we suggest that the influence of the ionosphere on the synthesis aperture is mainly due to E. layer, and the range of the irregularity scales is about 700-1000 meter. Again considering of the floating movement of the layer, a model of which as described in the text is established. Simulating computation of the pollution of E, layer on the synthesized beam was carried out, the caculated results show that: (1) the gain of the main lobe of synthesized beam, decreases about 10%, and the first minor lobe increases from 13%. to 18%, (2) aroud the right ascensioa axis, unsymetry appears in the synthesized beam so that a. right ascension error of about 0.6 second is introduced. (3) noise lobes appear in the border region far from the center of the synthesized beam, and also in two setorial regions. |
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| Keywords: | Solar terrestrial space: ionosphere-ionospheric sporadic E layer |
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