HR: 1340h
AN: AE23A-0904    [Abstracts]
TI: Use of Narrow Bipolar Event sferics to probe lower-ionosphere disturbances
AU: * Jacobson, A R
EM: abramj@u.washington.edu
AF: Earth and Space Sciences University of Washington, Box 351310, Seattle, WA 98195-1310, United States
AU: Lay, E
AF: Earth and Space Sciences University of Washington, Box 351310, Seattle, WA 98195-1310, United States
AU: Holzworth, R
AF: Earth and Space Sciences University of Washington, Box 351310, Seattle, WA 98195-1310, United States
AB: We are developing a method to probe the lower ionospheric D-region with multi-gigawatt LF radiation from Narrow Bipolar Event lightning discharges. The goal is to attain a useful lower-ionospheric "sounding", akin to an ionosonde, but taking advantage of natural wideband radio emissions whose power greatly exceeds any man- made transmitter. We are developing a full-wave model from which to retrieve D-region structural information via comparison of the model with data. We have already exercised this tool against D-region disturbances from solar flare transients. The ultimate goal is to exercise the tool against more localized disturbances caused by lightning EMP, thunderstorm quasi-electrostatic heating, and lightning-instigated energetic particle precipitation. This poster will report on progress to date.
DE: 2435 Ionospheric disturbances
DE: 2487 Wave propagation (0689, 3285, 4275, 4455, 6934)
DE: 2494 Instruments and techniques
DE: 3324 Lightning
SC: Atmospheric and Space Electricity [AE]
MN: 2007 Fall Meeting