Development of an Infrasound Propagation Modeling Tool Kit
Technical rept. 1 Oct 1997-31 Oct 1999
BBN TECHNOLOGIES ARLINGTON VA
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A software tool kit that integrates infrasound propagation models and upper atmospheric characterizations has been developed. The acoustic propagation models consist of a three dimensional ray theory model, a normal mode model, and a continuous-wave, two dimensional parabolic equation model. The baseline empirical atmospheric models are the Horizontal Wind Model and the Extended Mass Spectrometer - Incoherent Scatter Radar temperature model. Wind, temperature, and densities are modeled from the surface into the thermosphere and include spatial, diurnal, and seasonal effects. The component models have been integrated to allow for user friendly model execution and data visualization. Models can be applied to predict propagation characteristics necessary for estimation of travel times, bearings, and amplitudes from potential event locations worldwide. The software has been developed for modeling localization performance of a network of infrasound sensors. Studies are presented that analyze sensitivity of propagation predictions to environmental parameters. Comparisons of model predictions to measured events of interest are discussed.
- Computer Programming and Software