Irregular pulsations in simultaneous TV, IRIS and VLF observations

Kozelov, B. V. and Titova, E. E. and Manninen, J. and Honary, F. and Marple, S. and Turunen, T. (2005) Irregular pulsations in simultaneous TV, IRIS and VLF observations. In: Proceedings of the 31st Annual European Meeting on Atmospheric Studies by Optical Methods and 1st International Riometer Workshop, 2005-08-01.

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Abstract

The models of VLF emission generation are based on cyclotron wave-particle interaction mechanism. According to such models the generation of waves is accompanied by a modification of particles pitch-angle distribution, that can lead to their precipitation in a loss cone. The dissipation of energetic particles in the atmosphere is accompanied by excitation of auroral emissions at altitudes of 100-200 km, that is observed by optical instruments. If the precipitated particles are rather energetic to penetrate at altitudes below than 90 km, the ionization by them of atmospheric gases leads to an absorption of radiowaves, that is observed by riometers. However, to find direct correlation between VLF waves and particles precipitation is complicatedly. Only a few papers with examples of such correlation are known. In this report we consider simultaneous morning time observations of VLF antenna, IRIS riometer array, and TV all-sky camera located at Kilpisjärvi and Porojarvi, Finland. We used the continuous wavelet transformation of original data sets to find similarities in variations seen at time scales from 1 to 100 seconds.

Item Type: Contribution to Conference (Speech)
Journal or Publication Title: Proceedings of the 31st Annual European Meeting on Atmospheric Studies by Optical Methods and 1st International Riometer Workshop
Subjects:
Departments: Faculty of Science and Technology > Engineering
Faculty of Science and Technology > Physics
Faculty of Science and Technology > School of Computing & Communications
ID Code: 6741
Deposited By: ep_importer_dcs
Deposited On: 16 Jun 2008 15:05
Refereed?: No
Published?: Published
Last Modified: 18 Aug 2019 00:02
URI: https://eprints.lancs.ac.uk/id/eprint/6741

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