Figure 4

Imaging results of target T7 for case I: (a) contour plots obtained by using the proposed chirp-scaling algorithm; (b) range impulse response obtained by using the proposed chirp-scaling algorithm; (c) azimuth impulse response obtained by using the proposed chirp-scaling algorithm; (d) contour plots obtained by using the MSR spectrum-based algorithm; (e) range impulse response obtained by using the MSR spectrum-based algorithm; (f) azimuth impulse response by using the MSR spectrum-based algorithm.