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An introduction to synthetic-aperture radar

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2 Author(s)
Brown, William M. ; The University of Michigan ; Porcello, Leonard J.

One way of achieving fine-resolution terrain imagery using airborne, side-looking radar is to boost frequency; another is to decrease along-track tracking. Neither is attractive. But they would have had to do were it not for coherent wave radar¿upon which synthetic-aperture radar is premised. Using coherent radar, resolution can depend, not on the width of the beam, but on Doppler frequency shift. The azimuthal resolution of side-looking radar can therefore be of the same order of magnitude as that for range resolution. The key to converting the theoretical groundwork into a ``full-bodied'' system is an appropriate data-processing scheme. And the simplest scheme for working, processing, and deciphering the data is optical.

Published in:

Spectrum, IEEE  (Volume:6 ,  Issue: 9 )