Quantitative GPR inspection of quasi-homogeneous ground layers Victor Yavna, Zelimkhan Khakiev, Georgy Lazorenko, Anton Kasprzhitskii and Sergey Sulavko MATEC Web Conf., 251 (2018) 02025 Published online: 14 December 2018 DOI: 10.1051/matecconf/201825102025