Synthetic Aperture Radar Processing by Giorgio Franceschetti and Riccardo Lanari.
Converts the image from the radar's native geometry (range and azimuth) into a standard geographic coordinate system (e.g., UTM). This step incorporates a Digital Elevation Model (DEM) to correct for terrain distortions like foreshortening, layover, and shadowing. digital processing of synthetic aperture radar data pdf
algorithm provides exact focusing by solving the acoustic wave equation in the frequency domain. It handles RCM perfectly across all ranges using a process called (interpolation in the 2D wavenumber domain). While computationally demanding, it is the premier choice for wide-aperture, high-squint, or low-frequency (UHF/VHF) SAR systems where approximations used in RDA and CSA break down. Back-Projection Algorithm (BPA) digital processing of synthetic aperture radar data pdf