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LF band terrestrial radio bursts observed by WIND/WAVES
Author(s) -
Kaiser M. L.,
Desch M. D.,
Farrell W. M.,
Steinberg J.L.,
Reiner M. J.
Publication year - 1996
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/95gl03664
Subject(s) - physics , jovian , radio spectrum , astrophysics , radio wave , low frequency , solar radio , frequency drift , radio frequency , plasma oscillation , frequency band , radiation , component (thermodynamics) , very low frequency , solar wind , plasma , astronomy , phase (matter) , optics , planet , quantum mechanics , telecommunications , computer network , phase locked loop , bandwidth (computing) , computer science , saturn , thermodynamics
We report on a constituent of Earth's radio spectrum that shows remarkable similarities to Jovian “type III” or quasi‐periodic bursts. These terrestrial bursts lie in the radio LF band, down to the in situ plasma frequency and are made of two spectral components. The lower frequency component exhibits relatively rapid negative frequency drifts, similar to type III solar bursts but on a much shorter time scale. It appears to emanate from a large source region and its characteristics are the same as those of isotropic terrestrial kilometric radiation described by other authors. The higher frequency component does not drift much in frequency, only lasts about 1 to 5 minutes and sometimes extends up to 500 kHz. It appears to emanate from a discrete source. This high frequency component was never reported before because it is often hidden by AKR events. It might be produced by a mechanism which differs from AKR. These LF bursts may belong to a more common class of radio bursts representing a previously unappreciated segment of Earth's radio spectrum.