Modification of the aperture synthesizing method for underground sounding data processing

The creation of subsurface radar systems is a significant problem in modern radio physics and thus has been investigated by many authors. The ultrawideband (videopulse) scanning systems usually produce data which are hard to interpret. This leads to the necessity of developing efficient data processing algorithms. The synthetic aperture method (SAM) seems to be one of the most powerful techniques of data processing in this area. SAM is based upon the following two-stage procedure: 1) application of a compression filter to the signals reflected by the medium (echo-returns), the filter indicates the presence of the object reflected signal; and 2) spatial convolution of the obtained set of the echo-returns. Natural and numerical experiment results show that useful algorithms for subsurface data processing can be developed on the basis of the synthetic aperture algorithm. Nevertheless some modifications of this algorithm have to be carried out in order to achieve accessible results in real media data processing. In this paper the algorithms aimed at the correction of the inverse-matched filter and computation time reduction are presented.