Experiment on Observing Subsurface Targets in the VHF Band SAR

Currently, synthetic aperture radars operating in the VHF-P frequency bands are often used to solve subsurface sensing problems. The information capabilities of these systems in the context of observing subsurface objects have not been sufficiently studied yet. In this article, we consider the task of conducting field experiments in order to determine the depth of detection of subsurface targets in conditions of placing a VHF band radar on a car. To solve the problem, a combined technique hat combines field measurements with an active responder as a target and calculations of the signal-to-noise+background ratio on a radar image, was offered. It is shown that when conducting experiments, variation of the depth of immersion of the transmitting antenna of the responder only is highly sufficient, and greatly simplifies the field experiment. At the same time, the proposed method of field experiment takes into account both the characteristics of the real surface and the environment in which the target is immersed.