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Title: Modeling and observations of an elevated, moving infrasonic source: Eigenray methods

Abstract

In this paper, the acoustic ray tracing relations are extended by the inclusion of auxiliary parameters describing variations in the spatial ray coordinates and eikonal vector due to changes in the initial conditions. Computation of these parameters allows one to define the geometric spreading factor along individual ray paths and assists in identification of caustic surfaces so that phase shifts can be easily identified. A method is developed leveraging the auxiliary parameters to identify propagation paths connecting specific source-receiver geometries, termed eigenrays. The newly introduced method is found to be highly efficient in cases where propagation is non-planar due to horizontal variations in the propagation medium or the presence of cross winds. Finally, the eigenray method is utilized in analysis of infrasonic signals produced by a multi-stage sounding rocket launch with promising results for applications of tracking aeroacoustic sources in the atmosphere and specifically to analysis of motor performance during dynamic tests.

Authors:
 [1];  [2]
+ Show Author Affiliations
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Univ. of Mississippi, Oxford, MS (United States). National Center for Physical Acoustics (NCPA)
Publication Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation; LANL Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1467369
Report Number(s):
LA-UR-17-20026
Journal ID: ISSN 0001-4966
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Journal of the Acoustical Society of America
Additional Journal Information:
Journal Volume: 141; Journal Issue: 4; Journal ID: ISSN 0001-4966
Publisher:
Acoustical Society of America
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; infrasound; speed of sound; interpolation; thermosphere; Jacobians; stratosphere; rocket ballistics; acoustic modeling; acoustic signal processing

Citation Formats

Blom, Philip, and Waxler, Roger. Modeling and observations of an elevated, moving infrasonic source: Eigenray methods. United States: N. p., 2017. Web. doi:10.1121/1.4980096.
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Blom, Philip, & Waxler, Roger. Modeling and observations of an elevated, moving infrasonic source: Eigenray methods. United States. https://doi.org/10.1121/1.4980096
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Blom, Philip, and Waxler, Roger. Fri . "Modeling and observations of an elevated, moving infrasonic source: Eigenray methods". United States. https://doi.org/10.1121/1.4980096. https://www.osti.gov/servlets/purl/1467369.
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@article{osti_1467369,
title = {Modeling and observations of an elevated, moving infrasonic source: Eigenray methods},
author = {Blom, Philip and Waxler, Roger},
abstractNote = {In this paper, the acoustic ray tracing relations are extended by the inclusion of auxiliary parameters describing variations in the spatial ray coordinates and eikonal vector due to changes in the initial conditions. Computation of these parameters allows one to define the geometric spreading factor along individual ray paths and assists in identification of caustic surfaces so that phase shifts can be easily identified. A method is developed leveraging the auxiliary parameters to identify propagation paths connecting specific source-receiver geometries, termed eigenrays. The newly introduced method is found to be highly efficient in cases where propagation is non-planar due to horizontal variations in the propagation medium or the presence of cross winds. Finally, the eigenray method is utilized in analysis of infrasonic signals produced by a multi-stage sounding rocket launch with promising results for applications of tracking aeroacoustic sources in the atmosphere and specifically to analysis of motor performance during dynamic tests.},
doi = {10.1121/1.4980096},
journal = {Journal of the Acoustical Society of America},
number = 4,
volume = 141,
place = {United States},
year = {Fri Apr 14 00:00:00 EDT 2017},
month = {Fri Apr 14 00:00:00 EDT 2017}
}
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https://doi.org/10.1121/1.4980096
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Cited by: 24 works
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Works referenced in this record:

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journal, February 2009

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journal, May 2012

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    Works referencing / citing this record:

    Propagation Modeling Through Realistic Atmosphere and Benchmarking
    book, October 2018

    Estimating tropospheric and stratospheric winds using infrasound from explosions
    text, January 2019

    A Three‐Dimensional Array for the Study of Infrasound Propagation Through the Atmospheric Boundary Layer
    journal, August 2019

    • Smink, Madelon M. E.; Assink, Jelle D.; Bosveld, Fred C.
    • Journal of Geophysical Research: Atmospheres, Vol. 124, Issue 16
    • DOI: 10.1029/2019jd030386
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