Journal articles
Statistical analysis of VLF radio emissions triggered by power line harmonic radiation and observed by the low-altitude satellite DEMETER
Abstract : DEMETER was a low-altitude satellite in operation between 2004 and 2010 in a circular polar orbit. One of its main scientific objectives was to study ionospheric perturbations related to man-made activity. This paper investigates electromagnetic emissions triggered by Power Line Harmonic Radiation (PLHR), the man-made waves emitted at harmonics of 50 or 60 Hz. They look like rising tones or hooks with a starting frequency associated to a parent line with the frequency equal to a multiple of 50 or 60 Hz. They occur preferentially during daytime in a frequency band between 1 and 4 kHz. It is shown that these emissions are rather frequent at high latitudes (3 < L <6) above industrialized areas during periods of moderate magnetic activity. Their average intensity is of the order of 10 μV 2 m À2 Hz À1. PLHR propagates in the magnetosphere and triggers emissions due to wave-particle interactions in the equatorial region.
https://hal-insu.archives-ouvertes.fr/insu-01174151
Contributor : Nathalie Pothier <>
Submitted on : Wednesday, July 8, 2015 - 2:37:43 PM
Last modification on : Tuesday, April 28, 2020 - 10:38:05 AM
Document(s) archivé(s) le : Friday, October 9, 2015 - 11:00:14 AM
Contributor : Nathalie Pothier <>
Submitted on : Wednesday, July 8, 2015 - 2:37:43 PM
Last modification on : Tuesday, April 28, 2020 - 10:38:05 AM
Document(s) archivé(s) le : Friday, October 9, 2015 - 11:00:14 AM
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