The Broadband Normal Mode Model PROTEUS.
Abstract
The contractor, ARL: U Tex, developed the mormal mode model PROTEUS for use in analyzing ocean acoustic data. The model and its postprocessors simulate broadband propagation in range invariant environments. A wave theoretical appraoch was chosen to allow operation at low frequency in shallow water ( < or approx. = 200 Hz, < or approx. = 300 M), where x ray theory may not be applicable, PROTEUS is a multifrequency extension, based on the original ARL: U Tex single frequency normal mode model NEMESIS in order to limit software development time while producing a reliable program with a familiar user interface. This report describes the foundations of the PROTEUS computer program and presents sample output products. PROTEUS calculates a broadband set of normal modes for range invariant environments. Detection of a low frequency broadband sound source in shallow water has become a significant problem in underwater acoustics. Assessment of the environment's impact on such detection requires ( in addition to a specification of the source and a choice of detection algorithm) some means of modeling the signal propagation. A wave theory propagation model such as a normal model is needed. At ranges of interest ( > or approx. = 5 water depths) continuous spectrum contributions are nil, and the acoustic field can be constructed solely from the discrete modes.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1985
- Accession Number
- ADA159091
Entities
People
- R. F. Gragg
Organizations
- University of Texas at Austin