Validation of B0 and B1 in the IRI 2001 model at low solar activity for Ilorin an equatorial station

被引：12

作者：

Adeniyi, J. O. ^{[1
,2
]}

Radicella, S. M. ^{[1
]}

Adimula, I. A. ^{[2
]}

Willoughby, A. A. ^{[2
]}

Oladipo, O. A. ^{[2
]}

Olawepo, O. ^{[2
]}

机构：

[1] Abdus Salam Int Ctr Theoret Phys, Aeron & Radio Propagat Lab, Trieste, Italy

[2] Univ Ilorin, Dept Phys, Ilorin, Nigeria

来源：

ADVANCES IN SPACE RESEARCH | 2008年 / 42卷 / 04期

关键词：

equatorial; ionosphere; B0; B1; model; IRI2001;

D O I：

10.1016/j.asr.2007.09.042

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

A new set of data obtained at low solar activity front Ilorin, Nigeria (geog. latitude 8.5 degrees N, geog longitude, 4.6 degrees E, dip 4.1 degrees S) is used to validate the IRI 2001 model at low solar activity. The results show in general a good agreement between model and observed B0 at night but an over estimation during daytime. The overestimation is greatest during the morning period (0600LT-1000LT). The model prediction for B1 is fairly good at night and during the day. A dependence of B0 on solar zenith angle is observed during the daytime. A formulation of the form B0 = A[cos(chi)(n)] is therefore proposed. Values of the constants n and A were determined for the period of low solar activity for this station. (c) 2008 COSPAR. Published by Elsevier Ltd. All rights reserved.

引用

页码：691 / 694

页数：4

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