Correction of B2_bot for NeQuick during low solar activity at Hainan station

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• 作者：S.G. Wang^a ; ^b ; ^{shengguo007@sohu.com} ; J.K. Shi^a ; ^{jkshi@spaceweather.ac.cn} ; X. Wang^a ; ^{wangx@cssar.ac.cn} ; G.J. Wang^a ; ^{gjwang@spaceweather.ac.cn} ; H.F. Zhang^c ; G.M. Chen^b ; ^{chengm@spaceweather.ac.cn}
• 关键词：NeQuick ; Solar activity ; F2 peak parameters ; Fitting function
• 刊名：Advances in Space Research
• 出版年：2012
• 期刊代码：6_02731177
• 类别：et
• 出版时间：1 April, 2012
• 卷：49
• 期：7
• 页码：1160-1166
• 文件大小：885 K

摘要

This work is a continuation of the previous article and it focuses on low solar activity and modeling effort. NeQuick model uses Epstein layer formalism to model each part of the profile. We study the diurnal and seasonal variations of B2_bot, 螖B2 (B2_best 鈭?#xA0;B2_NeQuick2) and R (B2_best/B2_{NeQuick 2}) at Hainan station during low solar activity. The results show it is possible to improve the B2_bot parameter of the NeQuick model at that region during low solar activity. Then, we use a function 茠(t) with LT in different seasons to correct the B2_bot formula of NeQuick 2. The correction shows that (1) By the correction formula, the B2_bot of NeQuick is improved. The maximum standard deviation is improved for 9 km. (2) The correction formula is more effective in summer than in equinox and winter and performs better during early morning hours than during the rest of the day.