Temporal evolution of very strong Trimpis observed at Darwin, Australia

被引：27

作者：

Dowden, RL

Brundell, JB

Rodger, CJ

机构：

[1] Department of Physics, University of Otago, Dunedin

[2] Department of Physics, University of Otago, Box 56, Dunedin

来源：

GEOPHYSICAL RESEARCH LETTERS | 1997年 / 24卷 / 19期

关键词：

D O I：

10.1029/97GL02357

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Very strong phase and amplitude perturbations (Trimpis) of the very strong VLF transmission from NWC received in Darwin, Australia, enabled accurate measurement of the amplitude and phase of the scattered signal and of the time variation of these. The amplitude of the scattered signal decays as the logarithm of time, quite at odds with the exponential decay observed on classic Trimpis. During the amplitude decay, the phase of the scattered signal decreased at a decreasing rate. This is shown to be consistent with scattering from a bundle of sprite-like, conducting columns extending some 50 km below the base of the ionosphere.

引用

页码：2419 / 2422

页数：4

共 11 条

[1]

Armstrong W.C., 1983, Antarctic Journal, V18, P281

[2] PHASE AND AMPLITUDE PERTURBATIONS ON SUBIONOSPHERIC SIGNALS EXPLAINED IN TERMS OF ECHOES FROM LIGHTNING-INDUCED ELECTRON-PRECIPITATION IONIZATION PATCHES [J].