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The angular distribution of auroral kilometric radiation observed by the GEOTAIL spacecraft
Author(s) -
Kasaba Y.,
Matsumoto H.,
Hashimoto K.,
Anderson R. R.
Publication year - 1997
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 - 10.1029/97gl02599
Subject(s) - physics , spacecraft , earth's magnetic field , northern hemisphere , radiation , plasma , geophysics , range (aeronautics) , astrophysics , computational physics , atmospheric sciences , astronomy , magnetic field , optics , materials science , nuclear physics , quantum mechanics , composite material
We examine the angular distribution of auroral kilometric radiation (AKR) based on a 38‐month data set of GEOTAIL plasma wave observations. We show that the AKR illumination pattern becomes narrower with increasing frequency above 300 kHz. The difference is more evident in the duskside zone and when geomagnetic conditions become more disturbed. We also show that AKR is more active on the winter hemisphere especially for the higher frequency range.