ABYSSALLY GENERATED T PHASES
Abstract
Two distinct types of signals have been identified from studies of T- phase spectra and source locations. One, with its source at a shoaling slope of the ocean bottom and with dominant frequencies near 4 cps, is the previously recognized and described classic T phase. The other, with its source in deep water and with dominant frequencies near 30 cps, is newly identified and is here termed the abyssally generated, or abyssal, T phase. Scattering from the sea surface is proposed as a mechanism for producing rays which propagate through the ocean with an apparent velocity equal to sofar velocity. The sea surface roughness is hypothesized as shaping the spectrum of the abyssal T phase. A synthesis of the power-level record is derived which relates the degree of sharpness of the abyssal T-phase peak with focal depth.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1967
- Accession Number
- AD0649315
Entities
People
- Frederick K. Duennebier
- Rockne H. Johnson
- Roger A. Norris
Organizations
- University of Hawaiʻi System