SUBSURFACE PROPAGATION STUDIES
Abstract
The theory of electromagnetic waves originating from a subsurface source, radiator-to-medium coupling, noise environment in the subsurface communication, system parameters resulting from various system constraints and requirements, and the economic trade-offs of various design parameters in typical long-range subsurface communication systems are discussed. The effect of the ionospheric height, geo-electromagnetic parameters of the earth and ionosphere, effect of the depth of transmitter and receiver antennas below the earth's surface, radiation pattern and efficiency of a typical subsurface antenna, the effect of the ionospheric height, and various noise environments during summer and winter, daytime and nighttime are presented with the help of numerous graphs and illustrations. The results of the fundamental aspects of the subsurface communication system are summarized. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 11, 1960
- Accession Number
- AD0251074