Enhanced EISCAT UHF backscatter during high-energy auroral electron precipitation
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https://hdl.handle.net/10037/6045Date
2013Type
Journal articleTidsskriftartikkel
Peer reviewed
Author
Schlatter, Nicola M.; Ivchenko, Nickolay; Sergienko, T; Gustavsson, Björn Johan; Brändström, B. U. E.Abstract
Natural enhancements in the backscattered power
of incoherent scatter radars up to 5 orders of magnitudes
above the thermal backscatter are sometimes observed at
high latitudes. Recently observations of enhancements in the
backscattered power including a feature at zero Doppler shift
have been reported. These enhancements are limited in altitude
to tens of kilometers. The zero Doppler shift feature has
been interpreted as a signature of electron density cavitation.
Enhanced plasma lines during these observations have also
been reported. We report on the first EISCAT UHF observations
of enhanced backscattered radar power including a zero
Doppler shift feature. The enhancements originated from two
distinct and intermittent layers at about 200 km altitude. The
altitude extent of the enhancements, observed during auroral
high-energy electron precipitation, was < 2 km.
Publisher
CopernicusCitation
Annales Geophysicae 31(2013) nr. 10 s. 1681-1687Metadata
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