合成孔徑雷達(dá)定時(shí)器的設(shè)計(jì)
THE DESIGN OF TIMING SUBSYSTEM FOR SYNTHETIC APERTURE RADAR
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摘要: 正 (一)基本原理 合成孔徑雷達(dá)發(fā)射的微波脈沖輻照測(cè)繪帶內(nèi)的地物目標(biāo);而接收的回波則由顯示器和記錄器記錄在數(shù)據(jù)膠卷上。觸發(fā)顯示器掃描的距離延遲脈沖與發(fā)射脈沖之間的時(shí)延由雷達(dá)到測(cè)繪帶近地點(diǎn)的雙程差決定,這種時(shí)間關(guān)系是預(yù)先確定的。因此定時(shí)器的時(shí)間抖動(dòng)引起的時(shí)延變化和雷達(dá)載機(jī)的橫向運(yùn)動(dòng)引起的雙程差變化都會(huì)產(chǎn)生時(shí)間
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關(guān)鍵詞:
Abstract: This article deals with the design of the timing subsystem for Synthetic Aperture Radar. A synchronizing circuit is used to perform the ground velocity tracking. The time accuracy and frequency aceuracy are well suitable to the requiments of the Synthetic Aperture Kadar. -
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