Variation of Falcon 9 noise at far-field recording sites

The rapid launch cadence of SpaceX’s Falcon 9 rocket provides the opportunity to study the relative consistency of far-field noise propagation. Acoustical measurements of several Falcon 9 launches have been made on and near Vandenberg Space Force Base at a far-field location 8.4–14 km from the pad....

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Bibliographic Details
Published in:The Journal of the Acoustical Society of America 2024-03, Vol.155 (3_Supplement), p.A62-A62
Main Authors: Pulsipher, Noah, Moats, Levi T., Gee, Kent L., Hart, Grant W., McCullah-Boozer, Megan R., Hall, Lucas K.
Format: Article
Language:English
Online Access:Get full text
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Summary:The rapid launch cadence of SpaceX’s Falcon 9 rocket provides the opportunity to study the relative consistency of far-field noise propagation. Acoustical measurements of several Falcon 9 launches have been made on and near Vandenberg Space Force Base at a far-field location 8.4–14 km from the pad. This paper compares collocated measurements from different Falcon 9 missions to begin to understand data variability as a function of launch and environmental conditions at far-field locations. The 8.4 km location has been measured over 10 times, whereas other locations span subsets of launches. This comparative analysis includes time-varying levels, spectra, and waveform statistics, such as the pressure derivative skewness. Time periods of particular interest are liftoff, peak noise, and late into the launch when the vehicle is significantly downrange. [Work supported by USACE.]
ISSN:0001-4966
1520-8524
DOI:10.1121/10.0026804