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SUMMARY:Daytime modeling of VLF radio waves over land and sea\, comparison
  to DEMETER satellite data.
DTSTART;VALUE=DATE-TIME:20110714T150000Z
DTEND;VALUE=DATE-TIME:20110714T170000Z
DTSTAMP;VALUE=DATE-TIME:20260714T163144Z
UID:indico-contribution-5085@events.saip.org.za
DESCRIPTION:Speakers: Andrew Collier (Hermanus Magnetic Observatory)\nVery
  Low Frequency (VLF) radio waves travel with little attenuation in the Ear
 th-ionosphere waveguide.  The waveguide propagation conditions are determi
 ned by a variety of factors including the surface of the Earth and the fre
 e electron density profile.  Perturbations of the lower ionosphere modify 
 the waveguide and the propagation conditions in it.  A model based on Wait
 's mode theory is developed and used to investigate the propagation of VLF
  radio waves under different conditions.  As the VLF radio waves reflect o
 ff the lower ionosphere\, a portion of the energy leaks up into space\, le
 aving a 'fingerprint' of the modal interference pattern of the waveguide m
 odes.  This idea is used to test the validity of the model by comparing si
 mulation results with satellite data from DEMETER taken over the NWC trans
 mitter in North-West Australia.\n\nhttps://events.saip.org.za/event/7/cont
 ributions/5085/
LOCATION: Asteria
URL:https://events.saip.org.za/event/7/contributions/5085/
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