Remote Sensing of Underwater Sound.
Abstract
The work performed on a research program investigating interaction mechanisms for sensing underwater sound from a platform above the sea is reviewed. Two mechanisms were studied: the modulation of the electric permittivity of the salt water by the acoustic pressure and the free-surface vibration. The effects of these two mechanisms on the earth's atmospheric electric field and on an electromagnetic wave reflected from the sea surface were considered. The magnitudes of the modulations produced were compared with the internal receiver noise background and with external background modulations produced by the environment. The conclusion is that at present even the most hopeful of the mechanisms, Doppler modulation of electromagnetic waves, is not useful for the stated purpose because of both technological limitations and adverse requirements on operational parameters. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 15, 1970
- Accession Number
- AD0715132
Entities
People
- Wayne K. Rivers
Organizations
- Georgia Tech