Akademik Veri Yönetim Sistemi
NEAR SURFACE GEOPHYSICS, cilt.14, sa.2, ss.183-195, 2016 (SCI-Expanded)
This paper presents an approximation to display buried anti-tank landmines with ground-penetrating radar method, including physical data attributes by measuring data in a special military field and determination of soil pollution using mineralogical and chemical features of the soil obtained by confocal Raman spectrometry and polarized energy dispersive X-ray fluorescence, which are petro-graphical methods, before and after bursting the mine. Two-dimensional ground penetrating radar data were acquired on parallel profiles using 800-MHz shielded antenna on unexploded anti-tank landmines buried approximately 10 cm-15 cm in depth. After general processing in the time domain, we employed migration, a frequency-wavenumber (F-K) filter, and ground-penetrating radar data attributes with an amplitude envelope, spectral whitening, and first-time derivative to activate anti-tank landmine visualization. Finally, we obtained three-dimensional half bird's eye view of the processed volume with each separate attribute. We also derived the transparent three-dimensional volumes by assigning opacity to the amplitude-colour range. The results showed that the depth slices including attributes and the transparent three-dimensional depth-volumes could clearly image the anti-tank landmine. In addition, migration and F-K filter during special processing were very important in removing data noise. Ground-penetrating radar data-attributes particularly amplitude enveloping-could suppress small phase shifts in the neighbouring traces of the landmine amplitude anomalies and helped to obtain more complete results showing location and depth in the three-dimensional volume.