The holographic principle in subsurface Radar technology

A relatively rare type of subsurface radar – holographic radar – is considered in this article. Its principle of operation, advantages and disadvantages are considered, and compared to those of impulse radars. The RASCAN family of holographic radars is presented along with technical specifications and typical case histories. Among the applications considered are civil and historic building surveys, non-destructive testing of dielectric materials, security applications, and humanitarian demining. Each application area is illustrated by relevant data acquired in laboratory experiments or field tests.