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

  • Wayne N. EdwardsEmail author
  • Peter G. Brown
  • Robert J. Weryk
  • Douglas O. ReVelle
Chapter 2: Observation Techniques and Programs

Abstract

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.

Keywords

Atmosphere Infrasound Meteor Meteoroid Shock waves 

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Copyright information

© Springer Science+Business Media B.V. 2007

Authors and Affiliations

  • Wayne N. Edwards
    • 1
    Email author
  • Peter G. Brown
    • 1
  • Robert J. Weryk
    • 2
  • Douglas O. ReVelle
    • 3
  1. 1.Department of Earth SciencesUniversity of Western OntarioLondonCanada
  2. 2.Department of Physics and AstronomyUniversity of Western OntarioLondonCanada
  3. 3.Atmospheric, Climate and Environmental Dynamics, Meteorological Modeling TeamLos Alamos National LaboratoryLos AlamosUSA

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