论文标题
阿根廷低纬度的F2层峰特征的变异性高太阳活动和与IRI-2016模型进行比较
Variability of F2-layer peak characteristics at low latitude in Argentina for high and low solar activity and comparison with the IRI-2016 model
论文作者
论文摘要
这项工作介绍了南美低纬度站（Tucumán，26.9°S，294.6°E；磁纬度15.5°S，阿根廷）的FOF2和HMF2的变异性研究。为了比较电离层的行为，考虑了在不同季节性和太阳活动条件下获得的基于地面的离子测量测量（2009年低太阳能活动，2009年的一年）。用于分析可变性的参数是中位数，上和下四分位数。此外，将FOF2值与国际参考电离层（IRI）-2016模型估计的值进行了比较。发现：a）在FOF2和HMF2中观察到对太阳能活动的明显依赖，均随太阳能活动的增加而增加。 b）在低太阳活性时FOF2的变异性较高，在两个时期内呈现出相似可变性的HMF2中均未观察到这种行为。 c）夜间FOF2的可变性比白天大，在高太阳活动期间，这种行为更为明显。 d）FOF2的可变性高于HMF2。 e）在高太阳活性和低太阳活性下，观察到大约2天和5天的明显行星波光谱峰。 f）通常，IRI高估了白天的FOF2，并在降低后期低估了FOF2，在夜间显示更好的协议。
This work presents the study of the variability of foF2 and hmF2 at a low latitude station in South America (Tucumán, 26.9°S, 294.6°E; magnetic latitude 15.5°S, Argentina). Ground based ionosonde measurements obtained during different seasonal and solar activity conditions (a year of low solar activity, 2009 and one of high solar activity, 2016) are considered in order to compare the ionospheric behavior. The parameters used to analyze the variability are the median, upper and lower quartiles. In addition, the foF2 values are compared with those estimated by the International Reference Ionosphere (IRI) - 2016 model. It is found that: a) A clear dependence on solar activity is observed in foF2 and hmF2, both increase with increase in solar activity. b) the variability of foF2 is higher at low solar activity, this behavior is not observed in hmF2 that present similar variability during both periods. c) the variability of foF2 is larger at night than during the day, this behavior is more pronounced during the high solar activity period. d) The variability of foF2 is higher than that of hmF2. e) Significant planetary wave spectral peaks at about 2 and 5 days are observed at high and low solar activity. f) In general, IRI overestimates foF2 during daytime, and underestimates it at post-sunset period, a better agreement is shown during nighttime.
