利用中壢特高頻雷達測量中層大氣潮汐之三維風場觀測研究;Observation of Atmospheric Tides of Three Dimensional Wind Field in Mesosphere Using Chungli VHF Radar

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Title:	利用中壢特高頻雷達測量中層大氣潮汐之三維風場觀測研究;Observation of Atmospheric Tides of Three Dimensional Wind Field in Mesosphere Using Chungli VHF Radar
Authors:	陳凱胤;Kai-yin,Chen
Contributors:	太空科學研究所
Keywords:	流星尾;風場;中層大氣;背景雜訊;meteor;wind field;back ground noise
Date:	2016-01-27
Issue Date:	2016-03-17 19:06:04 (UTC+8)
Publisher:	國立中央大學
Abstract:	本研究係利用中壢特高頻雷達站於民國101年增設的一組干涉天線陣列，該陣列由5座八木天線排列成非等間距之十字型，提供干涉定位所需5路接收信號。此論文改動了以往低密度流星尾篩選機制，舊有篩選條件在於人為給一定數值做為篩選門檻，本次研究則是根據不斷隨時間變化的背景雜訊值制定篩選條件，更能符合實際情況，且篩選出更多流星尾事件。研究過程中對背景雜訊和大氣參數的關聯性進行分析，發現背景雜訊值和相對濕度呈現正相關，但在降雨時則沒有此特性。利用動窗法計算中氣層三維風場，和HWM模型比較水平風場之後得到正相關的結果，且HWM14比HWM07更符合實際風場。;The antenna array which consists of five Yagi antenna was used in this research.Five Yagi antenna was placed in a cross shape and the distances of each Yagi were different. The position of the target in three dimensional space can be derived by different phases.The targets may fail to locate because of different phases during operating in radar system and phase confusion. By using IGRF model, different phases during operating in radar system can be solved and geometric logic can deal with the phase confusion. Positions of the meteor tails can be located successfully and the three dimensional wind field of the mesosphere can be estimated with sliding window method.After surveying the HWM wind field observed, they are consist with my results and the Diurnal Tide features are quite obvious.
Appears in Collections:	[Graduate Institute of Space Science] Department of Earth Sciences

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