The term SAR describes a way
of synthesising a very large array antenna over a finite
period of time by using a series of returns from
a much smaller physical antenna that is moving relative to
the target. By synthesising a large array, the synthetic aperture
radar can enjoy the benefits of improved angular
resolution that come with large antennas without the problems associated
with large antennas. In fact, we see that much larger
synthetic apertures can be formed than would be possible using
a real antenna.
Other topics in our resources on Radar related to SAR include: