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Alternative TitleIonospheric TEC data assimilation and now-casting system over China
阿尔察; 刘四清; 黄文耿; 李建勇; 师立勤; 龚建村; 陈艳红; 沈华; 蔡燕霞; 鲁国瑞
Source Publication地球物理学报
Keyword数据同化 现报系统 电离层TEC 三维变分法 Gauss-Markov卡尔曼滤波
Other AbstractIonospheric data assimilation is a now-casting technique to incorporate irregular ionospheric measurements into certain background model, which is an effective and efficient way to overcome the limitation of the unbalanced data distribution and to improve the accuracy of the model, so that the model and the data can be optimally combined with each other to produce a more reliable and reasonable system specification. In this study, a regional total electron content (TEC) now-casting system over China and adjacent areas (70°E-140°E and 15°N-55°N) is developed on the basis of data assimilation technique. The International Reference Ionosphere (IRI) is used here as background model, and the GNSS data are derived from both the Space Environment Monitoring Network of Chinese Academy of Sciences (SEMnet) and International GNSS Service (IGS) data. A Three-dimensional variation algorithm (3DVAR) combined with Gauss-Markov Kalman filter technique is used to implement the data assimilation. The regional gridded TEC maps and the position errors of single-frequency GPS receivers can be generated and publicized online (http: //sepc. ac. cn/TEC_chn. php) in quasi-real time, which is updated for every 15 min. It is one of the ionospheric now-casting systems in China based on data assimilation algorithm, which can be used not only for real-time monitoring of ionosphere environment over China and adjacent areas, but also in providing accurate and effective specification of regional ionospheric TEC and error correction for satellite navigation, radar imaging, shortwave communication, and other relevant applications. © 2018, Science Press. All right reserved.
Indexed BySCI ; EI ; CSCD
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Cited Times:3[CSCD]   [CSCD Record]
Document Type期刊论文
Corresponding Author阿尔察
Recommended Citation
GB/T 7714
阿尔察,刘四清,黄文耿,等. 中国电离层TEC同化现报系统[J]. 地球物理学报,2018,61(6):2186-2197.
APA 阿尔察.,刘四清.,黄文耿.,李建勇.,师立勤.,...&鲁国瑞.(2018).中国电离层TEC同化现报系统.地球物理学报,61(6),2186-2197.
MLA 阿尔察,et al."中国电离层TEC同化现报系统".地球物理学报 61.6(2018):2186-2197.
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