A subsurface radar using a multi-frequency signal has been developed. It is
designated for surveying building structures and works. The characteristic
feature of this device is the possibility of obtaining sounding plane radi
o images featuring a high resolution attaining 1 ... 2 cm. The main applica
tions of this device includes the survey of building structures to reveal t
heir heterogeneities and defects and the investigation of premises to detec
t bugging devices.