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頁籤選單縮合
題名 | Geomagnetic Dissipation of Acoustic Wave in the Ionosphere=電離層聲波傳播之強度衰減 |
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作者 | 王心誠; | 書刊名 | 中華工商專校學報 |
卷期 | 13 1996.11[民85.11] |
頁次 | 頁68-72 |
分類號 | 334.5 |
關鍵詞 | 電離層; 聲波傳播; |
語文 | 英文(English) |
中文摘要 | 電離層聲波傳播之強度衰減除了黏性(Viscosity)及熱傳導(Heat Conduction) 外尚另有一種衰減因素,那就是由于地磁感應電流產生熱能所致。由本文的數學模式導出的 結果顯示此種衰減主要由正離子和中性原子間之碰撞來控制而與聲波頻率無關,又當聲波傳 播方向與地磁垂直時衰減率最大。 |
英文摘要 | Acoustic propagation in the ionosphere will suffer an additional dissipation besides the viscosity and heat conduction losses. This is owing to ohmic losses of currents being induced by the Earth's magnetic field. The conclusions obtained in this paper show that this geo-magnetic attenuation is mainly controlled by the ion-neutral particle collisions, largest in a direction across the field, and independent of the acoustic frequencies. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。