| Abstract: | The various embodiments presented herein relate to utilizing an
operational single-channel radar to collect and process synthetic
aperture radar (SAR) and ground moving target indicator (GMTI) imagery
from a same set of radar returns. In an embodiment, data is collected by
randomly staggering a slow-time pulse repetition interval (PRI) over a
SAR aperture such that a number of transmitted pulses in the SAR aperture
is preserved with respect to standard SAR, but many of the pulses are
spaced very closely enabling movers (e.g., targets) to be resolved,
wherein a relative velocity of the movers places them outside of the SAR
ground patch. The various embodiments of image reconstruction can be
based on compressed sensing inversion from undersampled data, which can
be solved efficiently using such techniques as Bregman iteration. The
various embodiments enable high-quality SAR reconstruction, and
high-quality GMTI reconstruction from the same set of radar returns. |