Skip to Main content Skip to Navigation
Journal articles

DEMETER observations of an intense upgoing column of ELF/VLF radiation excited by the HAARP HF heater

Abstract : DEMETER spacecraft observations of ELF signals generated by the recently upgraded High-Frequency Active Auroral Research Program (HAARP) HF facility (3.6 MW) reveal three distinctive regions characterizing upgoing ELF waves. These regions are classified by signal intensity and the minimum lateral distance d between the magnetic footprint of the satellite at 75-km altitude (D layer) and the point at 75-km altitude immediately above HAARP where the source is located. The first large region within d ' 900 km contains waves which propagate in the Earth-ionosphere waveguide and then leak upward to the spacecraft. The second region of d ' 200-300 km contains waves propagating to the spacecraft from the ionospheric source region without reflection from the ground. The third region contains waves of very high intensity (E ' 350 mV/m, B ' 20 pT) within a narrow cylindrical column of $10-20 km radius, also observed once before on the ISIS 1 spacecraft. The observed intense columnar radiation is consistent with predictions of a recent full-wave model of ELF radiation from HF-heater-produced ionospheric source currents.
Document type :
Journal articles
Complete list of metadata

https://hal-insu.archives-ouvertes.fr/insu-03037212
Contributor : Nathalie Pothier Connect in order to contact the contributor
Submitted on : Thursday, December 3, 2020 - 7:46:11 AM
Last modification on : Tuesday, October 12, 2021 - 5:20:25 PM
Long-term archiving on: : Thursday, March 4, 2021 - 6:26:03 PM

File

2008JA013208.pdf
Publisher files allowed on an open archive

Identifiers

Collections

Citation

D. Piddyachiy, U. Inan, T. Bell, N. Lehtinen, Michel Parrot. DEMETER observations of an intense upgoing column of ELF/VLF radiation excited by the HAARP HF heater. Journal of Geophysical Research Space Physics, American Geophysical Union/Wiley, 2008, 113 (A10), ⟨10.1029/2008JA013208⟩. ⟨insu-03037212⟩

Share

Metrics

Record views

66

Files downloads

49