ionospheric irregularities 中文意思是什麼
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On the following, on the basis of formulas given above, three kinds of effects due to ionosphere are presented : image shift due to group delay which was caused by the difference between the group velocity and the velocity of light in the ionosphere ; image distortion due to ionospheric dispersion which can create second phase error of lfm signals ; the last, the phase perturbation caused by the irregularities of the ionosphere can reduce the coherent length and affect azimuthal resolution
文中主要研究了電離層的三種影響：信號經過電離層傳播的群延遲引起的成像偏移；電離層的色散效應給線性調頻信號帶來二次相位誤差，導致圖像退化、失真；以及電離層的閃爍、湍流等不規則性引起的信號相位起伏。在此基礎上，比較分析了不同波段、帶寬條件下電離層的影響。 -
It is necessary to study the movement of the ionospheric irregularities through many different methods which is very important for the production of the ionospheric irregularities
故需要通過理論分析、數值模擬、實驗測量等多種手段對電離層不規則體的形成及運動過程加以研究。 -
Ionospheric scintillation can be observated frequently in low - latitude of china, so it is very important to know the physical mechanism of night - time f region plasma instability and irregularities in it
我國的低緯地區屬于電離層閃爍頻繁發生的區域，研究電離層f區中不規則結構的產生、演化、形態及分佈規律、對電波的影響等具有很重要的意義。
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