Application of the Brewster angle to quantify the dielectric properties of ground ice formations

摘要: Abstract Previous studies of ground ice using moveout type ground-penetrating radar (GPR) surveys indicate that the dielectric permittivity can constrain present in subsurface. Due to high-loss nature active layer over permafrost targets, however, signal strength GPR signals is often insufficient resolve basal boundary required for determining an underlying unit. We apply a non-conventional antenna orientation and post-processing method determine unit lowest resolvable boundary. conduct 450 MHz with collinear parallel oriented antennas on two adjacent formations region Thomas Lee Inlet, Devon Island, Nunavut. exploit Brewster angle calculate approximate below layer. The results agree within 1 on-ice measurements made during complementary study site.