High-resolution wave number spectrum using multi-point measurements in space - the Multi-point Signal Resonator (MSR) technique

被引:37
作者
Narita, Y. [1 ]
Glassmeier, K. -H. [1 ,2 ]
Motschmann, U. [3 ,4 ]
机构
[1] Tech Univ Carolo Wilhelmina Braunschweig, Inst Geophys & Extraterr Phys, D-38106 Braunschweig, Germany
[2] Max Planck Inst Sonnensyst Forsch, D-37191 Katlenburg Lindau, Germany
[3] Tech Univ Carolo Wilhelmina Braunschweig, Inst Theoret Phys, D-38106 Braunschweig, Germany
[4] DLR, Inst Planetenforsch, D-12489 Berlin, Germany
关键词
Space plasma physics; Experimental and mathematical techniques; Turbulence; Waves and instabilities; SOLAR-WIND TURBULENCE; MAGNETIC-FIELD; HOMOGENEOUS TURBULENCE; DISPERSION ANALYSIS; DISSIPATION RANGE; ENERGY CASCADE; HELICITY; PLASMA; MAGNETOSHEATH; SATELLITES;
D O I
10.5194/angeo-29-351-2011
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
A new analysis method is presented that provides a high-resolution power spectrum in a broad wave number domain based on multi-point measurements. The analysis technique is referred to as the Multi-point Signal Resonator (MSR) and it benefits from Capon's minimum variance method for obtaining the proper power spectral density of the signal as well as the MUSIC algorithm (Multiple Signal Classification) for considerably reducing the noise part in the spectrum. The mathematical foundation of the analysis method is presented and it is applied to synthetic data as well as Cluster observations of the interplanetary magnetic field. Using the MSR technique for Cluster data we find a wave in the solar wind propagating parallel to the mean magnetic field with relatively small amplitude, which is not identified by the Capon spectrum. The Cluster data analysis shows the potential of the MSR technique for studying waves and turbulence using multi-point measurements.
引用
收藏
页码:351 / 360
页数:10
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