Discrete autofocus for ultra-high resolution synthetic...

Details Discrete autofocus for ultra-high resolution synthetic... Discrete autofocus for ultra-high resolution synthetic...

G - Physics

01

S

343/37, 343/50

G01S 13/90 (2006.01)

Patent

CA 2003469

The invention provides improved focus by phase corrections for Synthetic Aperture Radar images by operation on the range bin containing a selected isolated target. A phase correction signal is generated by first obtaining a non-interfering radar return from the selected target through band pass filtering operation and then extracting a non-linear residual phase from the band pass filtered data with an arc- tangent generator. The residual phase derived by the arc-tangent generator is then applied to the range compressed SAR data as a phase correction signal.

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