SOLAR-ACTIVITY DEPENDENCE OF IONOSPHERIC ELECTRON-CONTENT AND SLAB THICKNESS USING DIFFERENT SOLAR INDEXES

被引：11

作者：

DABAS, RS

LAKSHMI, DR

REDDY, BM

机构：

[1] Radio Science Division, National Physical Laboratory, New Delhi

来源：

PURE AND APPLIED GEOPHYSICS | 1993年 / 140卷 / 04期

关键词：

IONOSPHERIC ELECTRON CONTENT; SLAB THICKNESS; SOLAR EUV FLUX; S-10.7CM FLUX; SUNSPOT NUMBER;

D O I：

10.1007/BF00876585

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Ionospheric electron content (IEC) and slab thickness (tau) data for the period 1977 to 1980 from Lunping (23.03 degrees N; 121.90 degrees E subionospheric) have been examined for their solar activity dependence. Local noontime monthly means as well as values for the 5 QQ days in a month have been examined separately with different solar indices, namely: solar EUV flux (170-190 Angstrom), S-10.7cm flux and sun spot number (SSN) on a seasonal basis. Both IEC and tau parameters exhibit better correlation with solar EUV and S-10.7cm fluxes than with SSN for all seasons. IEC increases linearly with both EUV and S-10.7cm flux whereas with SSN it shows a distinct nonlinear relationship during all seasons in both monthly mean and 5 QQ days' values. This study indicates that for correlating and predicting the variations (especially the medium term) in the ionospheric parameters, both EUV and S-10.7cm fluxes have an advantage over SSN.

引用

页码：721 / 728

页数：8

共 11 条

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