VLF wave generation via modulated

May 25, 2012 - waves have been generated via heating of the lower ionosphere. (50–100 km altitude) with High Frequency (HF, 3–10 MHz) radio waves...

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heating. The resulting variation in electron temperature is used to calculate the full time evolution of the so‐called. Hall, Pedersen, and Parallel conductivities, from which the amplitudes and phases of conductivity modulation at the modulation f

compare amplitude modulation, geometric modulation, and a previously proposed technique ... Due to the temperature‐dependent conductivity of the lower.

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ELF/VLF waves have been generated via steerable HF heating of the lower ionosphere. The temperature‐dependent conductivity of the lower ionospheric plasma enables HF heating (and subsequent recovery) to modulate natural current systems such as the

Jun 20, 2013 - when heating is modulated at ELF/VLF frequencies. We present a summary ... free space wavelengths (10–1000 km) are so much longer ... 1School of Electrical and Computer Engineering, Georgia Institute of ... are known to generate iono

Nov 16, 1998 - Abstract. This paper describes the results of a prelim- inary study to determine the effective heating and cooling time constants of ionospheric ...

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survey data, aided by wide-band VLFrRadioMT synthetic modelling and inversion studies, are used to ... measure of the induced horizontal electric field ... D. BeamishrJournal of Applied Geophysics 45 2000 33–47 ... principle, the VLF bandwidth can

Dec 28, 2004 - signals, up to 10-hop, are detected, with the signal dispersing and evolving in shape, indicative ... lines are usually dipole-like and tend to lie within or near ... a 21 km horizontal antenna (later extended to 42 km crossed dipoles)