IONOSONDE SIGNATURES OF PC1 PULSATIONS

被引:10
作者
ASLIN, PM
JARVIS, MJ
MORRISON, K
机构
[1] British Antarctic Survey, Natural Environment Research Council, High Cross, Cambridge, CB3 0ET, Madingley Road
来源
JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS | 1991年 / 53卷 / 3-4期
关键词
D O I
10.1016/0021-9169(91)90118-Q
中图分类号
P4 [大气科学(气象学)];
学科分类号
0706 ; 070601 ;
摘要
The first observations of the signatures of Pc1 pulsations in ionosonde echo data are reported. Oscillations are frequently observed in Doppler velocity, echo amplitude, group range and skymap echo-location position, and are clearly associated with simultaneous Pc1 geomagnetic micropulsations with a similar frequency. These oscillations, recorded at the sub-auroral Antarctic station of Halley (76-degrees-S, 27-degrees-W, L approximately 4.2), occur in either or both E- and F-region echo time series during a wide range of ionospheric conditions. Focusing of the ionospheric echoes due to the compressional action of the hydromagnetic wave is suggested as a possible mechanism.
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页码:343 / 349
页数:7
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