First observations of 4fce auroral roar emissions
First observations of 4fce auroral roar emissions
复制标题
4fce 极光咆哮排放的首次观测
DOI:
10.1029/2012gl051205
复制
发表时间:
2012
期刊:
影响因子:
--
通讯作者:
Y. Ogawa
中科院分区:
文献类型:
--
作者:
Sato;Y.;T. Ono;N. Sato;Y. Ogawa
This is a report on the first observations of auroral roar emissions near 4 times the ionospheric electron cyclotron frequency (fce) with a passive receiver installed in Svalbard, Norway. 4fceroar emissions were detected from 5.27 to 5.70 MHz during moderate geomagnetic disturbances in 22 days between May and September 2011 only from noon to evening, while no event occurred during the winter season. An analysis of a typical event shows that the electron density profile measured from EISCAT Svalbard dynasonde satisfies the condition that the upper frequency of the 4fceroar is nearly equal to both upper hybrid resonance frequency (fUH) and 4fceat 238‐km altitude. These observations support the idea expanded from the most commonly‐accepted generation mechanism of 2fceand 3fceroar: the origin of 4fceroar is upper hybrid waves favorably generated under the condition offUH∼ 4fcein the auroral F‐region ionosphere.
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影响因子:
--
作者:
A. Weatherwax;J. Labelle;M. L. Trimpi;R. Treumann;J. Minow;C. Deehr
通讯作者:
C. Deehr
影响因子:
5.2
作者:
P. Kellogg;S. Monson
通讯作者:
S. Monson
影响因子:
--
作者:
R. Kaufmann
通讯作者:
R. Kaufmann
影响因子:
--
作者:
J. Labelle;A. Weatherwax;M. Tantiwiwat;E. Jackson;J. Linder
通讯作者:
J. Linder
DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
佐藤由佳;他
通讯作者:
他