ABSTRACT
Synthetic Aperture Radar (SAR) synthesizes a large phased-array antenna aperture by moving an individual antenna array element or the conventional antenna through multiple successive locations in space. When the synthetic array face is perpendicular to the platform velocity vector, the mode of operation is called sidelooking stripmap SAR. SAR could also be described in the context of range-Doppler (RD) imaging. Doppler Beam Sharpening (DBS) assumes that the point scatterer response is compressed in the fast-time dimension. The RD algorithm is a commonly used technique to mitigate the effects of the quadratic phase term and the range curvature and provide fine-resolution imagery in the case that the Doppler Beam Sharpening is not applicable. Polar formatting algorithm is the most commonly used spotlight SAR image reconstruction algorithm to interpolate the polar format spectral data on to a rectangular grid.
