Long-term changes in ionospheric parameters over Ahmedabad

被引：9

作者：

Chandra, H ^{[1
]}

Vyas, GD ^{[1
]}

Sharma, S ^{[1
]}

机构：

[1] Phys Res Lab, Ahmedabad 380009, Gujarat, India

来源：

MIDDLE ATMOSPHERE: CHANGES AND ELECTRODYNAMICS | 1997年 / 20卷 / 11期

关键词：

D O I：

10.1016/S0273-1177(97)00609-1

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

Ionospheric data over Ahmedabad obtained from regular radio soundings made during past four decades are analyzed to study long term changes. Midday values of the critical frequencies of E, F-1 and F-2 layers show a small positive trend with changes of less than 0.1 MHz for E and F-2 layers and about 0.2 MHz for F-2 layer in of 40 years. Increase in the peak altitude of F-2 layer is also noticed. However the increases are within the limits of accuracies involved in estimation. (C) 1997 COSPAR. Published by Elsevier Science Ltd.

引用

页码：2161 / 2164

页数：4

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