Description: The guide presents a survey of radio techniques for measuring the electrical conductivity of the Earth. The results are applicable to the design of communication channels that are influenced by the electrical characteristics of the Earth. The techniques used at frequencies where the loss tangent is large are emphasised. The techniques are classed broadly into those which make use of drill holes into the Earth and those which do not. The paper also distinguishes between passive and active methods. In the latter methods, the radio source is controlled. Comments and critiques on the various methods are included. The guide contains 68 references, and appendices which contain theoretical and practical details of some of the methods.
Oversight Committee: APS/P - Propagation
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