In the paper

an improved tomographic tomographic algorithm is put forwarded according to the high resolu tion imaging capability on small terrain during the spotlight mode SAR procedure.By simplirying the pro cedure of Fourier reconstruction

reducing the A/D rate and PRF

implementing initial phase compensation

facil itating the hardware materialization

this new improved DFR algorithm greatly benefits the imaging proceessing ef ficiency.Necessary explanations

deductions

figures

tables and simulation results are given out.