Infrasonic Observations of Meteoroids: Preliminary Results from a Coordinated Optical-radar-infrasound Observing Campaign

Recent observations using the newly installed Elginfield infrasound array in coordination with the Southern Ontario all-sky meteor camera network and Canadian Meteor Orbit Radar (CMOR) has shown that the number of meteors producing infrasound at the Earth’s surface is more frequent than previously t...

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Bibliographic Details
Published in:Earth, moon, and planets moon, and planets, 2008-06, Vol.102 (1-4), p.221-229
Main Authors: Edwards, Wayne N., Brown, Peter G., Weryk, Robert J., ReVelle, Douglas O.
Format: Article
Language:English
Subjects:
Amplitudes
Astronomy
Astrophysics
Astrophysics and Astroparticles
Earth surface
Infrasound
Meteoroids
Meteors
Meteors & meteorites
Observations and Techniques
Orbits
Physics
Physics and Astronomy
Planetology
Radar
Shock waves
Space Exploration and Astronautics
Space Sciences (including Extraterrestrial Physics
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Summary:Recent observations using the newly installed Elginfield infrasound array in coordination with the Southern Ontario all-sky meteor camera network and Canadian Meteor Orbit Radar (CMOR) has shown that the number of meteors producing infrasound at the Earth’s surface is more frequent than previously thought. These data show the flux of meteoroids capable of producing infrasound at the ground is at least 1/month and is limited to meteors with peak visual brightness above −2. Comparisons to current meteor infrasound theory show excellent agreement with amplitude and period predictions for weakly non-linear shock waves using a realistic vertically inhomogeneous atmosphere. Similar predictions show isothermal assumptions underestimate the amplitude by orders of magnitude.
ISSN:0167-9295
1573-0794
DOI:10.1007/s11038-007-9154-6