Tracking Moving Ground Targets from Airborne SAR via Keystoning and Multiple Phase Center Interferometry
February 2007
P. K. Sanyal, The MITRE Corporation
D. M. Zasada, The MITRE Corporation
R. P. Perry, The MITRE Corporation
ABSTRACT
Without some form of motion compensation, SAR images experience significant range walk and can be quite blurred.
In 1997, MITRE reported development of the Keystone Process. Keystone Formatting simultaneously compensates for
multiple target motion at multiple radial velocities.
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 and georegister moving targets in the
SAR.
Additional Search Keywords
Airborne SAR, Geolocation, Interferometry, Keystoning, Surface Moving Targets
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