Airborne shortwave radar gauging of underground water level snow-layer depth and ice covering thickness

摘要

Abstract: Radar sensing of multi-layer structures deserves particular attention in the respect of practical applications in agriculture, geophysics, etc. Subsurface radar means allow to increase the value of geologic surveillance. Transferring from sensing homogeneous layers with small losses to sensing structures with great attenuation of signal demands lowering of the frequency of emitted signal. The article considers a method of sensing underground waters, snow and ice layers with frequencies of 20...150 MHz. Coherent and incoherent components of backscattered RF signal's power and envelope variation ratio are regarded the sources of information about the thickness of a layer.!5