The ideal case of a deep and well-formed stratospheric duct for long range infrasound propagation in the absence of tropospheric ducting is considered. A canonical form, that of a pair of arrivals, for ground returns of impulsive signals in a stratospheric duct is determined. The canonical form is derived from the geometrical acoustics approximation, and is validated and extended through full wave modeling. The full caustic structure of the field of ray paths is found and used to determine phase relations between the contributions to the wavetrain from different propagation paths. Finally, comparison with data collected from the 2005 fuel gas depot explosion in Buncefield, England is made. The correspondence between the theoretical results and the observations is shown to be quite good.
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April 2015
April 01 2015
The stratospheric arrival pair in infrasound propagation Available to Purchase
Roger Waxler;
Roger Waxler
a)
National Center for Physical Acoustics,
University of Mississippi
, University, Mississippi 38677
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Läslo G. Evers;
Läslo G. Evers
b)
Seismology Division,
Royal Netherlands Meteorological Institute (KNMI)
, P.O. Box 201, 3730 AE, De Bilt, The Netherlands
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Jelle Assink;
Jelle Assink
CEA, DAM, DIF
, F-91297 Arpajon, France
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Phillip Blom
Phillip Blom
Earth and Environmental Science Division, Los Alamos National Laboratory
, Los Alamos, New Mexico 87545
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Roger Waxler
a)
National Center for Physical Acoustics,
University of Mississippi
, University, Mississippi 38677
Läslo G. Evers
b)
Seismology Division,
Royal Netherlands Meteorological Institute (KNMI)
, P.O. Box 201, 3730 AE, De Bilt, The Netherlands
Jelle Assink
CEA, DAM, DIF
, F-91297 Arpajon, France
Phillip Blom
Earth and Environmental Science Division, Los Alamos National Laboratory
, Los Alamos, New Mexico 87545a)
Author to whom correspondence should be addressed. Electronic mail: [email protected]
b)
Also at: Department of Geoscience and Engineering, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Delft, The Netherlands.
J. Acoust. Soc. Am. 137, 1846–1856 (2015)
Article history
Received:
December 04 2014
Accepted:
March 23 2015
Citation
Roger Waxler, Läslo G. Evers, Jelle Assink, Phillip Blom; The stratospheric arrival pair in infrasound propagation. J. Acoust. Soc. Am. 1 April 2015; 137 (4): 1846–1856. https://doi.org/10.1121/1.4916718
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