SATELLITE-OBSERVATIONS OF THE SPATIAL EXTENT AND STRUCTURE OF PC-3,4,5 PULSATIONS NEAR THE MAGNETOSPHERIC EQUATOR

被引:61
作者
SINGER, HJ
RUSSELL, CT
KIVELSON, MG
FRITZ, TA
LENNARTSSON, W
机构
[1] UNIV CALIF LOS ANGELES,DEPT EARTH & SPACE SCI,LOS ANGELES,CA 90024
[2] LOCKHEED AIRCRAFT CORP,RES LAB,PALO ALTO,CA 94304
[3] NOAA,ERL,SPACE ENVIRONM LAB,BOULDER,CO 80302
关键词
D O I
10.1029/GL006i011p00889
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
Simultaneous observations of Pc 345 pulsations by five satellites in the pre‐noon local time sector at and near synchronous orbit are examined. The periods of these simultaneous pulsations are not the same at the different observation points. We attribute this difference to site dependent resonant conditions. The spatial properties of this temporal phenomenon are demonstrated with observations by ISEE‐1 and ‐2 as they pass through oscillations in a spatially limited region. Fundamental and second harmonic standing Alfvén waves are observed simultaneously on the same field line. The periods are consistent with model predictions when the measured plasma compositionwhich by mass consists mainly of singly ionized oxygenis taken into account. Copyright 1979 by the American Geophysical Union.
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收藏
页码:889 / 892
页数:4
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