Attenuation of the ground wave field over the highly inductive “ice – salt water” structure

Le résumé fourni par la source

The ground wave field above a highly inductive surface in the form of a two-layer medium «ice – salt water» is considered. The calculated graphs of strong variations in the modulus and additional phase of the ground wave field attenuation function are shown depending on the numerical distance, when at a fixed modulus value, the surface impedance phase varies from -30 to -89 degrees. The attenuation function is calculated using the Sommerfeld formulas for a flat Earth surface. The measured values of the attenuation function modulus obtained on the ice of Lake Solenoye in 2009 and 2024, when the ground wave field propagation conditions were significantly different, are presented. The attenuation function calculations based on the measured values of the resistivity and relative permittivity of salt water and ice thickness, as well as the selected values of the resistivity and relative permittivity for the ice of Lake Solenoye, represent a model of the measurements carried out depending on the distance from the transmitter. The performed modeling of the attenuation function modulus made it possible to estimate the electrical properties of ice.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.