Accession Number:

AD0669768

Title:

SUB-SURFACE COMMUNICATIONS.

Descriptive Note:

Conference proceedings.

Corporate Author:

ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT PARIS (FRANCE)

Personal Author(s):

Report Date:

1966-01-01

Pagination or Media Count:

649.0

Abstract:

The 12th AGARD symposium on sub-surface communications, brought together reports on two specialised fields lithospheric propagation and propagation involving water and ice. The electromagnetic phenomena are similar but the discontinuities produce quite different effects. The Earths crust contains rocks of fairly low conductivity which are found between rocks having a higher conductivity guides are thus obtained along layers having irregular forms. Sea and ice-caps represent more homogeneous media but attenuation caused by sea water is much greater than that due to the rocks in the lithospheric guides propagation through ice is possible without too much attenuation, a property which is useful for communicating with a submarine, but may be harmful because of the uncertainty it causes in questions of altimetry. Author

Subject Categories:

  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE