THEMIS observations of compressional poloidal pulsations in the dawnside magnetosphere: A case study

被引：15

作者：

Korotova, G. I. ^{[1
,2
]}

Sibeck, D. G. ^{[3
]}

Angelopoulos, V. ^{[4
]}

Walsh, B. M. ^{[3
]}

机构：

[1] IZMIRAN, Troitsk 142190, Moscow Region, Russia

[2] UMD, IPST, College Pk, MD USA

[3] NASA GSFC, Greenbelt, MD USA

[4] Univ Calif Los Angeles, IGPP ESS, Los Angeles, CA USA

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS | 2013年 / 118卷 / 12期

关键词：

ULF waves; ULF WAVES; PC-5; WAVE; GEOMAGNETIC-PULSATIONS; OUTER MAGNETOSPHERE; GEOSTATIONARY ORBIT; PC5; PULSATIONS; PLASMA; INSTABILITY; PROPAGATION;

D O I：

10.1002/2013JA019360

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present results from a case study of compressional poloidal pulsations with periods ranging from 5 to 12min in the dawn magnetosphere from 1630 to 2000 UT on 27 February 2011. However, we employ THEMIS (Time History of Events and Macroscale Interactions during Substorms) magnetic field, plasma, and energetic particle observations to determine azimuthal wavelengths (7000-27,000km) and velocities (9-28km/s) consistent with previous work. We then apply a new method invoking the north to south motion of the THEMIS spacecraft and the fact that the equatorial node exhibited north-south oscillations to derive the meridional structure of the wave in great detail. We determined that the amplitude of the meridional motion of the equatorial node was similar to 0.8 R-E, and that the meridional wave length exceeded 3 R-E.

引用

页码：7665 / 7673

页数：9

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