It has important value in military and civil . conventional algorithms for synthetic aperture radar uses the matched filter and convolves the data with a reference phase signal which changes with range 合成孔徑雷達( sar )是二戰(zhàn)后發(fā)展起來的一種新的雷達技術(shù),在軍事和民用方面都有重要的應(yīng)用價值。