Accession Number : AD0811104

Title :   IMPULSE RESPONSE OF A LAYERED BOTTOM.

Descriptive Note : Technical rept.,

Corporate Author : SACLANT ASW RESEARCH CENTRE LA SPEZIA (ITALY)

Personal Author(s) : Hastrup, Ole F.

Report Date : 14 JAN 1967

Pagination or Media Count : 30

Abstract : Numerical methods are used for the Fourier inversion of the frequency-dependent loss transfer function. Because of the non-zero finite values of the integrand for an infinite high frequency, the asymptotic value is subtracted from the integral, thereby making it possible to use a finite truncation frequency in the calculation of the remainder integral. The influence of a correct asymptotic value, truncation frequency, and frequency increment is shown in graphs. The impulse response is calculated at several angles of incidence for typical two and three layer models and is shown in graphs. (Author)

Descriptors :   (*OCEAN BOTTOM TOPOGRAPHY, REFLECTIVITY), (*OCEAN BOTTOM, REFLECTION), NUMERICAL METHODS AND PROCEDURES, RESPONSE, SEDIMENTATION, FOURIER ANALYSIS, GRAPHICS, MATHEMATICAL ANALYSIS, ANTISUBMARINE WARFARE, FREQUENCY, BROADBAND, ELECTROMAGNETIC PULSES, ECHO RANGING, SONAR SIGNALS.

Subject Categories : Physical and Dynamic Oceanography
      Numerical Mathematics

Distribution Statement : APPROVED FOR PUBLIC RELEASE