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Observations of intensity variations and harmonics of heater induced VLF waves

✍ Scribed by A. Oikarinen; J. Manninen; J. Kultima; T. Turunen

Book ID
104407607
Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
920 KB
Volume
59
Category
Article
ISSN
1364-6826

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✦ Synopsis

low-frequency (VLF) radio waves have been generated in the ionosphere by the heating facility near Tromso. VLF signals have been received at Porojarvi (69.17" N, 21.47" E, L=6.1), in Northern Finland, about 100 km from the heating transmitter. Three heating experiments were performed under different geophysical conditions and different results were obtained. Signal intensities have been compared with magnetic variations. Correlations and anti-correlations were observed. Several harmonics of the generated signal have generally been found. In some cases when the intensity of the detected VLF signal was low the first harmonic was as intensive as the fundamental frequency. VLF response from Artificial Periodic Inhomogeneities (API) experiment was also observed.

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