新乡观测的电离层TEC和板厚的统计与建模研究

A Statistical Study and Modeling of the Ionospheric TEC and the Slab Thickness with Observations at Xinxiang, China

利用1982年至1990年在新乡接收ETS－Ⅱ同步卫星136MHz信标所取得的电离层总电子含量TEC月中值和相应的F2层临界频率，计算了电离层板厚，分析比较了电离层板厚、TEC和F2层临界频率的日变化、季节变化和太阳活动变化的差异，给出了板厚随太阳活动的抛物关系，建立了新乡的电离层极厚模式，并与国际参考电离层和中国参考电离层模式的结果进行了比较。结果表明，本文的板厚模式预报的结果在太阳活动高年较国际参考电离层（IRI）和中国参考电离层（CRI）大为改善。

The ionospheric slab thickness is deduced in this paper using the ionospheric TEC data obtained by receiving 136MHz signal from ETS-Ⅱ satellite beacon during 1982-1990 at Xinxiang,China, and corresponding monthly median value f0F2 from ionosonde observations. It is first devoted to analysis of differences of the diurnal variations, seasonal variations and variations with solar activity between observed TEC, the slab thickness and f0F2. Assuming a parabolic relation between the slab thickness and solar activity, a model of the slab thickness is then set up by fitting the parabolic function to observed slab thickness data with the least-square method. Comparisons with IRI and CRI models show that the slab thickness model can give more precise results than the IRI and the CRI at higher solar activity.