Acoustic Bottom Reflectivity
Abstract
The acoustic reflectivity from the sea floor is often an important factor for the performance of ASW systems in different environments, such as in deep water when using the bottom bounce paths, and in general for sound propagation in shallow water. Furthermore, it plays a role in the degradation of towed array operations due to reflected tow ship radiated noise and in certain weapon systems and with the frequency range of interest which spans over a large band from a few Hz to tenths of kHz. Therefore there is a need to be able to accurately measure the reflectivity or predict it from known or assumed geoacoustical data. The results from the SACLANTCEN activity has appeared in several published and unpublished reports and articles. However, to make this more accessible for potential users, it was felt worthwhile to update the material and issue some of it as a single report. Special emphasis has been put into combining the theoretical results, with results obtained not from model tank experiments but from experiments in the real ocean environment where the action takes place. For this reason experimental and digital analysis techniques are included in the report. Furthermore , due to the wide introduction of microcomputers, a set of algorithms for the IBM-PC computer family has been developed to enable the user to carry out experiment either in the office or on board to study the effect of the bottom layering on the reflectivity. Instructions for using these programmed algorithms are contained in appendix A.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1986
- Accession Number
- ADA198829
Entities
People
- Ole F. Hastrup
Organizations
- SACLANT ASW Research Centre