NUMERICAL DETERMINATION OF EXPERIMENTAL BOTTOM REFLECTION LOSSES.
Abstract
When analyzing bottom reflection data, the reflection coefficient is usually obtained by analogue band filtering, squaring, and integration. This method leads to a loss of information regarding both amplitude and phase. Another method is suggested using Fourier transforms giving the reflection coefficient as a continuous function of frequency. The analogue-recorded signal is then either directly converted to digital form or a graphical representation is converted to digital data by the use of an electronic digitizing table. The digital data so obtained can then be used as the input to the computer together with the programs for computing the reflection loss and phase angle. The results can be obtained either as a continuous function of frequency or in different frequency bands. The method is illustrated by using reflection data at three angles of incidence. The loss is computed for the same bands as were previously used for analogue octave band filtering and is found to agree well with the data then obtained. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1967
- Accession Number
- AD0824826
Entities
People
- E. Schunk
- O. F. Hastrup
Organizations
- SACLANT ASW Research Centre