Signatures of terrestrial rotation in Auroral Kilometric Radiation observed by STEREO/SWAVES

Details Signatures of terrestrial rotation in Auroral Kilometric Radiation observed by STEREO/SWAVES Signatures of terrestrial rotation in Auroral Kilometric Radiation observed by STEREO/SWAVES

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008epsc.conf..701p&link_type=abstract

European Planetary Science Congress 2008, Proceedings of the conference held 21-25 September, 2008 in Münster, Germany. Online a

Physics

Scientific paper

ABSTRACT The 24 hours variations of the terrestrial Auroral Kilometric Radiation (AKR) are considered. The effect is detected in course of the analysis of STEREO/WAVES data. It has been found that the intensities of the AKR are modulated with a period of » 24 hours. The occurrence frequency of the AKR has been shown to be strongly dependent on the orientation of the rotating oblique Earth's magnetic dipole relative to the Sun. AKR is found to occur more often and emit in a broader frequency range when the axis of the terrestrial magnetic dipole is oriented toward the nightside. We suggest that the observed » 24 h variations of AKR may be connected with diurnal changes of the plasma frequency in the auroral region.

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