Computer Science – Sound
Scientific paper
Oct 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998geoji.135..255g&link_type=abstract
Geophysical Journal International, Volume 135, Issue 1, pp. 255-263.
Computer Science
Sound
43
Array, Atmosphere, Guided Waves, Infrasound, Traveltime, Wave Propagation
Scientific paper
The tau-p method of Buland & Chapman (1983) is reformulated for sound waves propagating in a stratified atmosphere under the influence of a height-dependent wind velocity profile. For a given launch angle along a specified azimuth, the ray parameter is redefined to include the influence of the horizontal wind component along the direction of wave propagation. Under the assumption of negligible horizontal wind shear, the horizontal wind component transverse to the ray propagation does not affect the direction of the wave normal, but displaces the reference frame of the moving wavefront, thus altering the observed incidence azimuth. Expressions are derived for the time, horizontal range, and transverse range of the arriving waves as a function of ray parameter. Algorithms for the location of infrasonic wave sources using the modified tau-p formulation in conjunction with regional atmospheric wind and temperature data are discussed.
Garces Milton A.
Hansen Roger A.
Lindquist Kent G.
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