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Direct, Channel-to-Channel Clutter Cancellation (DC4) with Phase-Interferometry in Multi-Channel SAR for Detecting Surface Moving Targets
March 2008
Dr. P. K. Sanyal, The MITRE Corporation
Dr. D. M. Zasada, The MITRE Corporation
R. P. Perry, The MITRE Corporation
ABSTRACT
In a Synthetic Aperture Image of the ground, the target
motion causes the moving targets to appear at locations
different from their true instantaneous locations on the
ground. In a corresponding interferometric phase image, all
points on the ground nominally appear as a continuum of
phase differences while the moving targets appear as
discontinuities. By threshold comparisons within the intensity
and the phase images, we (and others) have shown that it is
possible to detect moving targets in the SAR.
In this paper we show that the detectability of moving
targets in multi-channel SAR is further enhanced by a direct,
channel-to-channel cancellation of the fixed ground image,
which acts as the clutter.
Additional Search Keywords
Surface Moving Target Indication (SMTI), SAR, Clutter Cancellation, Phase Interferometry
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