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- W2622084742 abstract "Each summer, large-scale detonations are carried out at the Utah Test and Training Range (UTTR) west of Salt Lake City. In 2016, acoustic sensors were placed at ranges up to 90 km east of the UTTR test site. The frequencies of the recorded signals indicate that they are infrasonic waves. The travel times imply that they are direct arrivals although the sensors lie within a shadow zone. Finally, the signal amplitudes indicate that acoustic propagation is nonlinear near the source. Consequently, numerical simulations that account for diffraction, and the effects of strong shocks are required to accurately map infrasound propagation into this region. A finite difference time-domain infrasound propagation method is applied to these signals. The algorithm relies on the assumption that the environmental model is azimuthally symmetric about the source location, allowing for efficient numerical computation of acoustic propagation from a spherical source. For each detonation, numerical computations are performed along a series of azimuths from the shot position, using accurate weather and topography along each path. The results show that infrasound penetration into the shadow zone is accurately predicted. The synthesized over-pressures are positive correlated with observed pressure amplitudes, to an accuracy of 8 dB." @default.
- W2622084742 created "2017-06-15" @default.
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- W2622084742 date "2017-05-01" @default.
- W2622084742 modified "2023-10-17" @default.
- W2622084742 title "Mapping nonlinear infrasound penetration into a shadow zone: Results from rocket motor blasts at the Utah Test and Training Range" @default.
- W2622084742 doi "https://doi.org/10.1121/1.4987792" @default.
- W2622084742 hasPublicationYear "2017" @default.
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