Cassini observations of aperiodic waves on Saturn's magnetodisc
Cassini observations of aperiodic waves on Saturn's magnetodisc
复制标题
卡西尼号对土星磁盘上非周期波的观测
DOI:
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发表时间:
2017
期刊:
影响因子:
--
通讯作者:
C. Arridge
中科院分区:
文献类型:
--
作者:
C. J. Martin;C. Arridge
The location and motion of Saturn's equatorial current sheet is the result of an interplay between a quasi‐static deformation that varies in radial distance and local time, impulsive perturbations that produce large‐scale displacements, quasiperiodic perturbations near the planetary rotation period, and wave‐like structures on shorter timescales. This study focuses on the latter, aperiodic wave pulses with periods from 1 to 30 min, which are unrelated to the quasiperiodic “flapping” with a period near that of Saturn's rotation. Cassini magnetometer data were surveyed for these aperiodic structures and then fitted to a simple model in order to estimate the properties of the waves. The model consists of a modified Harris current sheet model deformed by a Gaussian pulse wave function. This then allows for the extraction of wave parameters and current sheet properties. In particular, we show an increase in current sheet scale height with radial distance from Saturn, an increase in the wave amplitude with radial distance, and the resolution of propagation directions using the wave vector fitted by the model. The dominant propagation direction is found to be radially outward from Saturn.
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影响因子:
--
作者:
C. Arridge;K. Khurana;C. Russell;D. Southwood;N. Achilleos;M. Dougherty;A. Coates;H. Leinweber
通讯作者:
C. Arridge;K. Khurana;C. Russell;D. Southwood;N. Achilleos;M. Dougherty;A. Coates;H. Leinweber
DOI:
10.1029/2007ja012540
发表时间:
2008-04
期刊:
Scopus
影响因子:
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作者:
C. Arridge;C. Russell;N. Achilleos;K. Khurana;M. Dougherty;S. Cowley;E. Bunce;D. Southwood
通讯作者:
C. Arridge;C. Russell;N. Achilleos;K. Khurana;M. Dougherty;S. Cowley;E. Bunce;D. Southwood
影响因子:
10.3
作者:
Arridge C
通讯作者:
Arridge C
DOI:
10.1029/2010ja015666
发表时间:
2010
期刊:
Space Physics
影响因子:
--
作者:
Andrews D
通讯作者:
Andrews D