High-Resolution Ranging of the ELF/VLF Source Region Generated by the HAARP HF Transmitter

Details High-Resolution Ranging of the ELF/VLF Source Region Generated by the HAARP HF Transmitter High-Resolution Ranging of the ELF/VLF Source Region Generated by the HAARP HF Transmitter

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsa43b1593m&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SA43B-1593

Physics

0619 Electromagnetic Theory, 0654 Plasmas, 2403 Active Experiments, 2407 Auroral Ionosphere (2704), 2409 Current Systems (2721)

Scientific paper

During the 2008 PARS Summer School a novel technique was employed to determine the location of the dominant ELF/VLF source region using ground-based ELF/VLF receivers located between 30 and 100 km from the HAARP HF transmitter in Gakona, Alaska. Previous ELF/VLF wave generation studies have approximated the altitude of the dominant ELF/VLF source region assuming the location is directly above the HF heater (e.g., Rietveld et al. [1989]). It may be the case, however, that different portions of the spatially distributed HF-heated region dominate the ELF/VLF signals observed at ground-based receivers located different radial distances from the HF transmitter. We employ the dual-beam capabilities of the HAARP array together with a specific modulation frequency-time format to provide bounds for the dominant ELF/VLF source region location. In this paper, we experimentally determine (with ±1 km ranging accuracy) the location of the dominant ELF/VLF source region within the larger HF-heated ionospheric patch and analyze its dependence on receiver location.

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