Case 13: VHF sounder of 5 m LVF regolith, 5 m HVF ice. From left to right: diagram of scenario showing subsurface profile. Total backscatter radargram displaying normalized radar intensity in dB, with range-averaged response overlaid as a black line. All interfaces are clearly resolved and differentiated using a VHF sounding instrument. Orange, blue, and brown horizontal lines denote interfaces of regolith, ice, and basalt, respectively.