The high resolution real-time image processing method for the strip mode SAR with the stretching method of the broadband LFM signal is discussed in this paper.There are three differences from the existing real-time image processors.The first is the echo of range is de-chirped in SAR receiver

the second is the necessity of real-time correcting the range cell migration during the processing

and the third is the real-time continuous processing by one-aperture method in azimuth.The processing principle and method for the de-chirped range data is analyzed in detail and the RCMC suited for real-time processing is discussed carefully.At last

the time limitation and the total amount of computation in real-time image processing are analyzed clearly.