桂林实测VTEC与IRI模型VTEC的比较  

Comparison of VTEC measurements in Guilin and IRI modeled VTEC

作　　者：张晓雪[1] 邹玉华[1] 

机构地区：[1]桂林电子科技大学电子工程与自动化学院,广西桂林541004

出　　处：《桂林电子科技大学学报》2016年第3期240-243,共4页Journal of Guilin University of Electronic Technology

基　　金：国家自然科学基金(41464005);广西自然科学基金(2014GXNSFAA118374)

摘　　要：为了研究桂林（地理坐标25.29°N,110.33°E,地磁坐标15.04°N,181.98°E）电离层的垂直总电子含量（VTEC）变化特征,利用桂林的电离层闪烁与TEC监测仪2014年3-4月的双频GNSS观测数据计算得到了VTEC,并与国际参考电离层（IRI）模型估算的VTEC进行比较。结果表明,IRI模型估算结果与实测VTEC相差较大。IRI模型VTEC的日变化比较平缓,实测VTEC的日变化较剧烈;与IRI模型VTEC相比,实测VTEC的日峰值出现时间滞后1-3h;实测VTEC的日峰值比IRI模型VTEC的日峰值高约40TECU。In order to study the variability features of the ionospheric VTEC（vertical total electron content）in Guilin（geographic coordinates 25.29°N,110.33°E,geomagnetic coordinates 15.04°N,181.98°E）,the dual-frequency GNSS observations recorded from March to April in 2014 by an ionospheric scintillation and TEC monitor installed in Guilin are used to calculate VTEC,and then the calculated VTEC is compared with VTEC estimated by the IRI（international reference ionosphere）model.The results show that VTEC estimated by the IRI model differs greatly from the measured VTEC.The diurnal variation of VTEC estimated by the IRI model is gentle,but the diurnal variation of the measured VTEC is very strong.Compared with VTEC estimated by the IRI model,the measured VTEC diurnal peak time lags 1-3h.The diurnal peak of the measured VTEC is larger than that of VTEC estimated by the IRI model about 40 TECU.

关 键 词：桂林 VTEC IRI模型 

分 类 号：P352.7[天文地球—空间物理学]