1340h
AN: SA43B-1594
TI: ELF/VLF Wave Radiation by an Equatorial Ionospheric Heater

AU: * Lehtinen, N G
EM: nleht@stanford.edu

AF: STAR Laboratory, EE Department, Stanford University, 350 Serra
Mall, Stanford, 94305, United States

AU: Inan, U S
EM: inan@stanford.edu

AF: STAR Laboratory, EE Department, Stanford University, 350 Serra
Mall, Stanford, 94305, United States

AB: The equatorial electrojet current, which is modulated by an
ionospheric heating facility, radiates ELF/VLF waves. The calculation
of this radiation is performed using a new stable full-wave method for
a horizontally- stratified arbitrary anisotropic medium, with
arbitrary harmonically-varying current distribution. This method is
capable of calculating the radiation into both the ionosphere and the
Earth-ionosphere waveguide. Unlike heating at high latitudes with
significant emission of whistlers, at the geomagnetic equator the
radiation goes only into the Earth-ionosphere waveguide. The radiated
energy flux is in general higher than that for a similar high-latitude
heater, and is also found to be anisotropic in the horizontal
direction.

DE: 2403 Active experiments
SC: SPA-Aeronomy [SA]
MN: 2008 Fall Meeting