| 从射电天文观测中提取电离层信息的一种统计方法 |
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| 引用本文： | 韩文焌,张喜镇.从射电天文观测中提取电离层信息的一种统计方法[J].空间科学学报,1990(3). |
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| 作者姓名： | 韩文焌 张喜镇 |
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| 作者单位： | 中国科学院北京天文台
(韩文焌)，中国科学院北京天文台(张喜镇) |
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| 摘 要： | 本文在分析了法拉第旋转效应、多源观测效应和程差补偿误差等对可见度函数的相位的影响的基础上,确认了:当电离层不规则性尺度较基线长为大时,仅有电离层引起的可见度函数的相位与基线长成正比且具有随时间快变化的特点这一物理事实;从而提出了从米波综合孔径射电望远镜的观测数据中提取电离层信息的统计方法,并分析了该法的特点,给出了统计实例.
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| 关 键 词： | 电离层不规则性 不规则性检测 |
A STATISTICAL METHOD TO EXTRACT INFORMATIONS ABOUT IONOSPHERE FROM RADIO ASTRONOMICAL OBSERVATIONS |
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| Han Wen-jun Zhang Xi-zhen.A STATISTICAL METHOD TO EXTRACT INFORMATIONS ABOUT IONOSPHERE FROM RADIO ASTRONOMICAL OBSERVATIONS[J].Chinese Journal of Space Science,1990(3). |
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| Authors: | Han Wen-jun Zhang Xi-zhen |
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| Abstract: | Based on the analysis about the effects on the visibility function caused by the Faraday rotation, the multi-source observations and the errors in path difference compensation, it is confirmed, in this paper, that only the phase induced by the ionospheric irregularities with scale sizes larger than the base line length, is proportional to the base line length, and is characterized by rapid time variations. Then a statistical method to extract informations about ionosphere from metre wave radio astronomical observations is provided, and the character of this method is analysed, some statistical examples are given also. |
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| Keywords: | Ionospheric irrigularity Irrigularity detection |
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