Accession Number : AD0717087

Title :   Feasibility of Detecting Objects Buried in the Sea Bottom with Love Waves.

Descriptive Note : Final technical rept. 1 Jun-31 Oct 70,

Corporate Author : SCIENTIFIC RESEARCH ASSOCIATES INC ROCKVILLE MD

Personal Author(s) : Hudimac,Albert A.

Report Date : NOV 1970

Pagination or Media Count : 87

Abstract : The concept of a system for the detection of objects buried in the ocean bottom using Love waves for irradiation and compressional waves in the sea for detection is described. Previous work is reviewed. An operational system for the embodiment of the concept is presented. A Love wave sonar equation is developed so that the capabilities of the system can be treated in an orderly fashion. The source level and (loss-less) propagation are analyzed rigorously for a simple model of the ocean bottom. The scattering by the target and the absorption of Love waves are treated more approximately. It is asserted that it is feasible to detect objects in the bottom of the sea by a Love wave system at ranges that would be of interest in operational situations. Qualitative arguments are presented on the basis of analyses done and on the basis of results in the technical literature; quantitative proof requires additional calculations and analyses, as well as better empirical knowledge of Love wave absorption and scattering from imperfections in ocean bottom strata. (Author)

Descriptors :   (*UNDERWATER OBJECT LOCATORS, UNDERWATER SOUND), (*OCEAN BOTTOM, UNDERWATER OBJECTS), OCEAN MODELS, FEASIBILITY STUDIES, SONAR, SEDIMENTATION, MATHEMATICAL MODELS

Subject Categories : Physical and Dynamic Oceanography
      Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE