改进的Kriging技术实时重构区域电离层foF2的分布

Improved Kriging technique of ionospheric parameter foF2 instantaneous mapping

改进了kriging技术重构电离层F2层临界频率foF2的方法,利用国际参考电离层IRI2001模型作为背景场,通过拟合国际参考电离层模型得到“等效太阳黑子数”,并利用kriging技术来完成区域电离层的重构,是区域电离层重构的一种方法,它适合重构区域内电离层探测站较少的情况。与直接利用实测临界频率进行kriging重构相比,改进的kriging技术提高了重构的精度和稳健性。也表明了背景电离层模型在电离层重构中的重要作用。

Utilizing the International Reference Ionosphere model （IRI-2001） as background ionosphere to obtain ＂equivalent sunspot＂, and reconstructing regional ionosphere by means of the traditional Kriging technique, an improved Kriging technique for reconstructing the critical frequency of the F2 layer （foF2） is pro- posed in this paper, it is applicable for the case of less ionosphere observation points. Compared with the Kriging reconstruction technique by using the real-time critical frequency directly, the improved method raise accuracy and stability of re- construction. Furthermore, the background ionosphere model is very important factor in the filed of ionosphere reconstruction.