GPR ground-wave parameters changes due to variation of soil moistureHenryk Marcak, Sylwia Tomecka-Suchoń, Rafał Czarny, Paweł Pysz, Akinniyi Akinsunmade and Tetiana KrilE3S Web Conf., 66 (2018) 01003DOI: https://doi.org/10.1051/e3sconf/20186601003