Signatures of 2-day wave in the E-region electric fields and their relationship to winds and ionospheric currents

被引：11

作者：

Aveiro, H. C. ^{[1
]}

Denardini, C. M. ^{[1
]}

Abdu, M. A. ^{[1
]}

机构：

[1] Inst Nacl Pesquisas Espaciais, Sao Jose Dos Campos, SP, Brazil

来源：

ANNALES GEOPHYSICAE | 2009年 / 27卷 / 02期

关键词：

Ionosphere; Equatorial ionosphere; VHF RADAR OBSERVATIONS; IN-SITU MEASUREMENTS; EQUATORIAL ELECTROJET; PLANETARY WAVE; LOW LATITUDES; SPACED DATA; SYSTEM; THERMOSPHERE;

D O I：

10.5194/angeo-27-631-2009

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We analyze the effects of the 2-day wave activity in the EEJ using one coherent scatter radar and eight magnetometer stations located close to the dip equator. The wavelet analysis of the magnetometer data reveals a 2-day signature in the semidiurnal geomagnetic tide. The E-region zonal background ionospheric electric field, derived from coherent radar measurements, shows 2-day oscillations in agreement with such oscillations in the magnetometers data. An anticorrelation between the amplitude of the tidal periodicites (diurnal and semidiurnal) and that of the 2-day signature is also shown in the electric fields. The results are compared with simultaneous observations of 2-day planetary wave in meridional winds and ionosonde data. Further, our results are discussed based on the analysis of the magnetic activity.

引用

页码：631 / 638

页数：8

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