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Using the World Wide Lightning Location Network (WWLLN) to study Very Low Frequency transmission in the Earth-Ionosphere Waveguide: 2. Model test by patterns of detection/non-detection
  • Abram R Jacobson,
  • Robert H. Holzworth,
  • James B Brundell
Abram R Jacobson
University of Washington

Corresponding Author:abramj@uw.edu

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Robert H. Holzworth
University of Washington
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James B Brundell
University of Otago
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This is the second half of a two-part study. In the first part, we had used the World Wide Lightning Location Network’s recorded signal amplitudes to test a model of Very Low Frequency signal transmission from the lightning to each sensor. The model predicts a dramatic worsening of transmission at low magnetic latitudes, for nighttime propagation (compared to daytime propagation) toward magnetic West. However, we found that the use of amplitudes was ill-adapted for testing the model under conditions of a deep outage of transmission. Since the relative weakening of nighttime transmission is rather counter-intuitive, we have now developed an alternative approach to testing that model prediction. This alternative approach highlights the patterns of detection/non-detection of several low-magnetic-latitude WWLLN stations and compares those patterns with the appropriate patterns of the model transmission.
Jan 2022Published in Radio Science volume 57 issue 1. 10.1029/2021RS007362