In the limited synthetic aperture radar (SAR) detection time

it is shown that the track of the moving target may be approximated to a linear function versus azimuth time.Furthermore

an effective method of SAR weak moving target detection is proposed based on hybrid integration in this paper.The detection time duration is divided into multiple coherent processing intervals (CPIs).Coherent integration in same range cell may be done via fast Fourier transform (FFT) within each CPI and noncoherent integration through several range cells may be done via Hough transform among all CPIs

and thus higher integration gain can be obtained.Simulation results are also given to demonstrate that the detection performance of weak moving target may be dramatically improved.