• 作者： 呂秀鏞; 郭富雄
• 作者服務機構： 私立輔仁大學物理系; 國立中央大學物理系
• 中文摘要： 本文分析德國SOUSY特高頻雷達回波信號之回波參數，回波強度與大氣層層結構之垂直運動幅度的交叉關係。所謂回波參數係定義為層層反射強度與亂流散射強度之比值。實驗數據係在兩個截然不同的天氣條件下得自高度在1.8公里與7.2公里之間的回波信號。分析結果顯示，回波信號與層層結構之垂直運動幅度均被大氣亂流強度所控制。
• 英文摘要： The echo parameter of MST radar signals, which is defined as the ratio between the layer reflectioncontribution and the volume scattering contribution to the echo signals, is calculated for SOUSY databetween the height of 1.8 km and 7.2 km over two different time periods under different dynamical condi-tions. The correlation among the time variations of the echo parameter, echo power and layer's verticalmotion in each height range are analyzed. Statistics show that the echo power as well as the amplitudesof layer's vertical motion are predominantly controlled by the strength of the turbulence.
• 中文關鍵字： VHF radar echo statistics; signal processing; atmospheric dynamics; radar echo mechanism
• 英文關鍵字： --