  Synthetic Aperture RADAR is a radar imaging technique in which the relative
motion of the sensor is used to synthesize a very long antenna and obtain high
spatial resolution. The increasing interest of the scientific community to
simplify SAR sensors and develop automatic system to quickly obtain a
sufficiently good precision image is fostered by the will of developing
low-cost/light-weight SAR systems to be carried by drones. Standard SAR raw
data processing techniques assume uniform motion of the satellite and a fixed
antenna beam pointing sideway orthogonally to the motion path, assumed
rectilinear. In the same hypothesis, a novel blind data focusing technique is
presented, able to obtain good quality images of the inspected area without the
use of ancillary data information. Despite SAR data processing is a well
established imaging technology that has become fundamental in several fields
and applications, in this paper a novel approach has been used to exploit
coherent illumination, demonstrating the possibility of extracting a large part
of the ancillary data information from the raw data itself, to be used in the
focusing procedure. Preliminary results are presented for ERS raw data
focusing. The proposed Matlab software is distributed under the Noncommercial,
Share Alike 4.0, International Creative Common license by the authors.
