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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 Koch, Karl and Ceranna, Lars (2013) Application of propagation modeling to verify and discriminate ground-truth infrasound signals at regional distances. Infrasound Technology Workshop 2013, 07.-11. Okt 2013, Wien, Österreich.

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An infrasound field campaign was performed in 2011/2012 utilizing six single infrasound sensors along the great circle path between a known infrasound ground-truth source (ARIANE 5 engine test facility, Lampoldshausen, Germany) and a nearby receiver (German infrasound array I26DE, Bavarian Forest) covering a distance of about 320km in total. The recordings gathered provide new insights in the infrasonic wave propagation at regional distances and, in particular, through the near-source shadow zone by comparing measured signals with modeling results. Infrasound propagation modeling utilizing ray-tracing and parabolic equation approaches is performed to explain detections and non-detections at certain ranges from the ground-truth source. Modeling results show a significant influence of small-scale atmospheric variations (of e.g. wind and sound speed) on the propagation pattern, resulting in varying tropospheric and stratospheric ducting behavior. An extensive set of gravity wave profiles was tested to investigate the influences of atmospheric dynamics on the infrasound wave field and improve the modeling results. The modeling is also applied to complementary detections obtained during the field campaign; namely one case associated with two potential, contemporaneous and closely spaced infrasound sources, is presented in detail. Propagation modeling is used to resolve the source ambiguity between a ground-based and a higher altitude source and give a strong preference with respect to the observed infrasonic signatures.

Item URL in elib:https://elib.dlr.de/100464/
Document Type:Conference or Workshop Item (Speech)
Title:Application of propagation modeling to verify and discriminate ground-truth infrasound signals at regional distances
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Streicher, FlorianDLRUNSPECIFIED
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Infrasound; Propagation Modeling; Source Discrimination; Ground-Truth
Event Title:Infrasound Technology Workshop 2013
Event Location:Wien, Österreich
Event Type:international Conference, Workshop
Event Dates:07.-11. Okt 2013
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 14:38
Last Modified:10 May 2016 23:37

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