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(meteorobs) Good VLF radio resource
Hello all,
Those with an interest in doing field research into VLF radio emissions
from fireballs might find the following WWW links helpful. These involve a
naturalist, named Steve McGreevy, who has been studying naturally occurring
VLF emissions for many years, and has an extensive Internet archive of
various VLF information pages and sounds available (along with commercial
products, of course). A few links are:
http://www.npr.org/programs/lnfsound/onair/990326.onair.html
(a feature done on NPR's All Things Considered" which includes some long
passages of VLF sounds)
http://www-pw.physics.uiowadot edu/mcgreevy.htm
(introduction and several audio files for download)
http://www.triax.com/vlfradio/natradio.htm
(further information and links to sound archives)
http://www.triax.com/vlfradio/wr3gde.htm
(audio listening guide)
Although it is a listening guide designed for McGreevy's own hand held VLF
radio (which he produces), this last is a good "must read" for anyone
considering monitoring VLF frequencies for a potential correlation between
fireballs and VLF emissions, because it explains much of the other various
phenomena which will be detected and their sources (lightning, aurora,
geomagnetic activity, , etc). The only mention that Mr. MeGreevy makes of
meteor VLF is in the reference section, to a 1992 S&T article -- stating
that it is a controversial topic and in need of further study.
If there is a VLF-meteor correlation, it apparently hasn't been observed or
noted by VLF enthusiasts to any great degree so far.
Take care,
Jim
James Richardson
Tallahassee, Florida
richardson@digitalexp.com
Operations Manager / Radiometeor Project Coordinator
American Meteor Society (AMS)
http://www.amsmeteors.org
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