台灣上空F域公尺級場列不規則體沿磁力線映射之研究

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Title:	台灣上空F域公尺級場列不規則體沿磁力線映射之研究
Authors:	孫慈寬;Sun, Tzu-Kuan
Contributors:	太空科學與工程研究所
Keywords:	電離層擴散F;電場映射;場沿不規則體;特高頻雷達;雷達干涉法;Ionosphere spread-F;Mapping of electric field;Field-aligned irregularity;VHF radar;Radar interferometry
Date:	2019-07-24
Issue Date:	2019-09-03 14:29:14 (UTC+8)
Publisher:	國立中央大學
Abstract:	電離層不規則體過去曾由不同儀器進行研究，本文以架設在中壢與太麻里的特高頻雷達站共同觀測，分析跨越同一條磁力線但地點不同的電離層場列不規則體，其有利於研究台灣上空F層電漿不規則體特性。在2018/07/04白天時兩地同時觀測到F層場列不規則體，分析過程中發現兩地F層不規則體回波資料在時間上有重疊的區域，且都是自西向東的飄移、相似的頻譜寬以及都卜勒速度皆為遠離雷達方向，隨時間有增大的趨勢，並利用雷達干涉法將不規則體定位在經緯度上，比對兩地不規則體於時間、空間中的關係，透過以上觀測結果驗證磁赤道上空電場沿著磁力線映射到低緯度區域，造成當地電漿不規則體生成與飄移，才使同一條磁力線上有相似的動力行為。;Ionospheric irregularities have been studied by different instruments in the past. This paper observed by using two VHF radar stations located in Chungli and Taimali, and analyzed the field-aligned irregularities of the ionosphere that across the same magnetic field line but different locations. It is conducive to study the characteristics of the F-layer plasma irregularities over Taiwan. During the daytime of 2018/07/04, the F-region field-aligned irregularities were observed simultaneously. During the analysis, we found that the echo data of F-region irregularities in two places are very similar in the east-west motion, the spectrum width and the Doppler velocity. The radar interferometry method is used to locate irregularities on latitude-longitude plane, comparing the relationship between the irregularities in time and space. Through the observations above, it is verified that the electric field on the magnetic equator mapping along the magnetic field lines to the low latitude area, causing local plasma irregularities to generate and drift, so that the same magnetic field line has similar dynamic behavior.
Appears in Collections:	[Graduate Institute of Space Science] Department of Earth Sciences

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