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Application of Propagation Modeling to Verify and Discriminate Ground-Truth Infrasound Signals at Regional Distances

Pilger, Christoph and Streicher, Florian and Ceranna, Lars and Koch, Karl (2013) Application of Propagation Modeling to Verify and Discriminate Ground-Truth Infrasound Signals at Regional Distances. InfraMatics, 2013 (2), pp. 39-55. Scientific Research Publishing. DOI: DOI: 10.4236/inframatics.2013.24004 ISSN 2169-2696

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Official URL: http://dx.doi.org/10.4236/inframatics.2013.24004


An infrasound field campaign was performed in 2011/2012 utilizing single infrasound sensors along the great circle path between a known ground-truth source (Ariane 5 engine test facility, Lampoldshausen, Germany) and a regional receiver (German infrasound array IS26, Bavarian Forest) covering a distance of rough 320 km in total. The gathered recordings provide new insights in the infrasonic wave propagation at regional and near-source distances by comparing measured signals with modeling results within this study. Ray-tracing and parabolic equation approaches are utilized to model infrasound propagation from the ground-truth source to the line profile sensors and explain the obtained detec-tions and non-detections. Modeling and observation results are compared by estimating their amplitude, quantifying amplitude deviations and also considering observed and calculated travel times and celerities. Modeling results show a significant influence of small-scale atmospheric variations in effective sound speed profiles on the propagation pattern, which results in varying tropospheric and stratospheric ducting behavior. A large number of gravity wave profiles are tested to investigate the influences of atmospheric dynamics on the infrasound wave field and improve the modeling results. The modeling is furthermore applied to a case of two potential, contemporaneous and closely spaced infrasound sources. Propagation modeling is used here to resolve the source ambiguity between a ground-based and a higher alti-tude source giving a strong preference to the latter with respect to the observed infrasonic signatures. The good agree-ment between modeling and observation results within this study successfully shows the benefit of applying infrasound propagation modeling to the validation of infrasound measurements, verification of ducting behavior and discrimination of infrasound sources.

Item URL in elib:https://elib.dlr.de/100450/
Document Type:Article
Title:Application of Propagation Modeling to Verify and Discriminate Ground-Truth Infrasound Signals at Regional Distances
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Streicher, FlorianFlorian.Streicher (at) dlr.deUNSPECIFIED
Date:18 December 2013
Journal or Publication Title:InfraMatics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
DOI :DOI: 10.4236/inframatics.2013.24004
Page Range:pp. 39-55
Publisher:Scientific Research Publishing
Series Name:InfraMatics
Keywords:Infrasound; Propagation Modeling; Ground-Truth
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Atmosphären- und Klimaforschung
Location: Oberpfaffenhofen
Institutes and Institutions:German Remote Sensing Data Center > Atmosphere
Deposited By: Streicher, Florian
Deposited On:07 Dec 2015 13:02
Last Modified:31 Jul 2019 19:57

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