A NEW METHOD TO ESTIMATE DOPPLER CENTROID FOR SPACEBORNE SAR-AMPLITUDE CORRELATION METHOD
星载SAR多普勒质心估记的新方法——幅度相关法

The linear relationship between Doppler centroid and range walki, in spaceborne SAR data is analysed,and a new method to estimate Doppler centroir is proposed, which is called amplitude correlation method. Compared with Li's(1985) clutterlock method that is widely used now, the new method has much less compv tation burden and is able to give higher estimation accuracy for a quasi-homogeneous or a non-homogeneous scene. This is clearly verified by the experimental results of estimating Doppler centroid for SEASAT-A raw data.