Synthetic aperture radar image reconstruction algorithms designedfor subsurface imaging

摘要

The standard image reconstruction algorithm for most SAR systemsis either the wavenumber algorithm mainly used for exact wide bandwidthimaging or a version of the chirp scaling algorithm if computationalefficiency is important. When it is desired to image a subsurface layer,these reconstruction algorithms can be modified to emphasize asubsurface layer at the expense of the surface layer. The key to themodified algorithm is a reduction of the wavelength used in thereconstruction process by a predetermined amount where the amount of thereduction depends on the depth and the dielectric constant of the soil.Some simulated results shows the effectiveness of the modified algorithm