Notes for Geoacoustic_TDFD
WOODS HOLE OCEANOGRAPHIC INSTITUTION MA DEPT OF GEOLOGY AND GEOPHYSICS
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These notes were written to help users run the WHOl TDFD Time Domain Finite Difference elastic wave equation code that was prepared for distribution through the ONR Ocean Acoustics Library httpwww.hlsresearch.comoalib. The code and documentation are based on materials that were developed for a Numerical Wave Propagation class given at MIT in the Fall of 2000. The code used is the full two-dimensional time-domain finite-difference code developed at WHOI over the past 25 years, but in order to reduce the number of variables to a manageable size, we consider a two dimensional, isotropic problem with fixed parameters in time and space. For example, the source waveform in time for both beam and point sources is a Ricker wavelet, time units have been normalized to periods defined at the peak frequency for pressure in water, space units have been normalized to water wavelengths defined at the peak frequency of pressure in water - with compressional sound speed and density of 1 .5kmsec and l000kgm3 and the domain size has been fixed at 72 x 12 water wavelengths.
- Physical and Dynamic Oceanography
- Computer Programming and Software