10.5061/DRYAD.354KG7D
Young, Eliot F.
Southwest Research Institute
Lees, Jonathan M.
University of North Carolina
Klein, Viliam
University of Colorado Boulder
Arrowsmith, Steven J.
Sandia National Laboratories
Ballard, Courtney
Southwest Research Institute
Bowman, Daniel
0000-0002-9341-520X
Sandia National Laboratories
Data from: Explosion-generated infrasound recorded on ground and airborne
microbarometers at regional distances
Dryad
dataset
2019
balloon
infrasound
Geophysical acoustics
Southwest Research Institute
https://ror.org/03tghng59
2019-04-27T00:00:00Z
2019-04-27T00:00:00Z
en
https://doi.org/10.1785/0220180038
1854537840 bytes
3
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Recent work in deploying infrasound (low frequency sound) sensors on
aerostats and free flying balloons has shown them to be viable
alternatives to ground stations. However, no study to date has compared
the performance of surface and free floating infrasound microbarometers
with respect to acoustic events at regional (100s of kilometers) range.
The prospect of enhanced detection of aerial explosions at similar ranges,
such as those from bolides, has not been investigated either. We examined
infrasound signals from three 1 ton TNT equivalent explosions using
microbarometers on two separate balloons at ranges of 280 to 400 km and
ground stations at ranges of 6.3 to 350 km. Signal celerities were
consistent with acoustic waves traveling in the stratospheric duct.
However, significant differences were noted between the observed arrival
patterns and those predicted by an acoustic propagation model. Very low
background noise levels on the balloons were consistent with previous
studies that suggest wind interference is minimal on freely drifting
sensors. Simulated propagation patterns and observed noise levels also
confirm that balloon-borne microbarometers should be very effective at
detecting explosions in the middle and upper atmosphere as well as those
on the surface.
Download the data file, unzip it, and then run the following shell
commands to concatenate and then uncompress the files: cat usie.tgz.* |
tar xzv
# Data from: Explosion-generated infrasound recorded on ground and
airborne microbarometers at regional distances
[https://doi.org/10.5061/dryad.354kg7d](https://doi.org/10.5061/dryad.354kg7d) Give a brief summary of dataset contents, contextualized in experimental procedures and results. ## Description of the data and file structure The data come in four tar archives that must be downloaded and combined using the following shell commands: There are two types of data included in this repository: raw digitizer output files in a proprietary format, and data converted into physical units (Pascals) in Seismic Analysis Code (SAC) format. Both types are provided for traceability purposes. The Seismic Analysis Code (SAC) file format is one of the most commonly used formats used in seismic studies. It can be read by a variety of programming languages, including the Obspy library in Python and RSEIS in R. It also has a standalone interactive program. A good reference for SAC is here: http://ds.iris.edu/files/sac-manual/manual/file\_format.html The raw digitizer output consists of files written by the Omnirecs (now DiGOS) Datacube unit. The manufacturer provides several methods of extracting data from these files. Programs for data extraction are located here: https://digos.eu/seismology/