OASES is a general purpose computer code for modeling seismo-acoustic propagation in horizontally stratified waveguides using wavenumber integration in combination with the Direct Global Matrix solution technique. It is basically an upgraded version of SAFARI, distributed by SACLANTCEN (now NURC). It has the following advantages:
- The model provides a full wave solution for the field generated by a single source as well as for that generated by a vertical source array.
- It allows the spatial distribution of the acoustic field to be evaluated at least one order of magnitude faster than with existing models based on the Thomson–Haskell solution technique.
- The computational efficiency of the numerical code is demonstrated by providing exact numerical solutions for the reflectivity pattern associated with narrow ultrasonic beams incident on a fluid–solid interface near the Rayleigh angle.
The OASES Base (Export) Package can be downloaded via anonymous svn/http from the MIT LAMSS repository at http://lamss.mit.edu/lamss/pmwiki/pmwiki.php?n=Site.Oases.