Observations of HF-induced instability in the auroral E region
Permanent link
https://hdl.handle.net/10037/6044Date
2013Type
Journal articleTidsskriftartikkel
Peer reviewed
Author
Schlatter, Nicola M.; Ivchenko, Nickolay; Gustavsson, Björn Johan; Leyser, Thomas; Rietveld, Michael TAbstract
Enhancements were observed in backscattered
radar power during an ionospheric heating experiment from
two distinct altitude regions in the auroral E region above
Tromsø. For the experiment the EISCAT Tromsø heater
was operated with O mode and X mode alternated at
4.04 MHz, close to the 3rd electron gyroharmonic. Ion-line
data recorded with the EISCAT UHF radar reveal different
temporal evolutions as well as different ion-line characteristics
for the enhancements from the two altitude regions. The
upper layer is dominated by a strong central feature, whereas
the lower layer has three peaks corresponding to the central
feature and the two ion lines. The altitude region of the
two closely spaced (altitude separation 5 km) but distinct
enhancements is close to the critical altitude for the heater
wave.
Publisher
CopernicusCitation
Annales Geophysicae 31(2013) nr. 6 s. 1103-1108Metadata
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