PROPAGATION OF ARTIFICIALLY EXCITED LANGMUIR-WAVES IN THE IONOSPHERE

被引:17
作者
KOHL, H [1 ]
KOPKA, H [1 ]
LAHOZ, C [1 ]
STUBBE, P [1 ]
机构
[1] EISCAT,N-9027 RAMFJORDBOTN,NORWAY
关键词
RADAR;
D O I
10.1029/RS022i004p00655
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The MPAE heater near Tromsoe, Norway was used to excite parametric decay instabilities in the ionosphere, which were observed by means of the EISCAT radar. During unfavorable geophysical conditions the heater power may not be sufficient to exceed the threshold of excitation for wavelengths matched to the observing radar. Evidence is presented that during such conditions instabilities of longer wavelengths are produced that cannot be seen by the radar immediately, but become observable after they have propagated for some distance and changed their wavelength according to the dispersion relation.
引用
收藏
页码:655 / 661
页数:7
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