Mass, height of burst, and source–receiver distance constraints on the acoustic coda phase delay method
Journal Article
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· Journal of the Acoustical Society of America
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- National Security Technologies, North Las Vegas, NV (United States)
Here, this research uses the acoustic coda phase delay method to estimate relative changes in air temperature between explosions with varying event masses and heights of burst. It also places a bound on source–receiver distance for the method. Previous studies used events with different shapes, height of bursts, and masses and recorded the acoustic codas at source–receiver distances less than 1 km. This research further explores the method using explosions that differ in mass (by up to an order of magnitude) and are placed at varying heights. Source–receiver distances also cover an area out to 7 km. Relative air temperature change estimates are compared to complementary meteorological observations. Results show that two explosions that differ by an order of magnitude cannot be used with this method because their propagation times in the near field and their fundamental frequencies are different. These differences are expressed as inaccuracies in the relative air temperature change estimates. An order of magnitude difference in mass is also shown to bias estimates higher. Small differences in height of burst do not affect the accuracy of the method. Finally, an upper bound of 1 km on source–receiver distance is provided based on the standard deviation characteristics of the estimates.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE; USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- AC04-94AL85000; AC52-07NA27344; NA0003525
- OSTI ID:
- 1441482
- Alternate ID(s):
- OSTI ID: 1835685
OSTI ID: 1434355
- Report Number(s):
- LLNL-JRNL--824600; SAND--2018-3530J; 662245
- Journal Information:
- Journal of the Acoustical Society of America, Journal Name: Journal of the Acoustical Society of America Journal Issue: 4 Vol. 143; ISSN 0001-4966
- Publisher:
- Acoustical Society of AmericaCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Tracking scattered signals in the acoustic coda using independent component analysis in a topographically complex setting
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journal | November 2018 |
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Program Document
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Sat Jul 01 00:00:00 EDT 2017
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OSTI ID:1429815