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aurora borealis 

1 record(s) found with the tag "radio technology" (multi-year projects are grouped):
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The effects of the ionospheric auroral zone on the propagation of very low frequency VLF/LF and HF radio waves
Principal Investigator: Bickel, John
Licensed Year(s): 1992 1990 1989
Summary: The Researchers will continue to collect data using an antenna and a computer operated VLF (very low frequency) signal receiving and recording equipment....