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电离层参量的提取是开展电离层研究的基础,而数据同化技术则是获取电离层参量的一种重要手段。以NeQuick模型的输出作为背景场,Kalman滤波作为同化算法,利用数据同化技术实现区域电离层TEC重构,结果表明,数据同化方法重构的倾斜总电子含量(TEC)和垂直TEC与实测值较为一致。相比NeQuick模型及全球电离层地图(GIM)数据,数据同化方法重构得到的TEC的平均误差和标准差均有明显的降低,实测数据验证了数据同化技术在区域TEC重构中的精度和可靠性。
The extraction of ionospheric parameters is the basis of ionospheric research, and data assimilation technology is an important means of obtaining ionospheric parameters. Using the output of NeQuick model as the background field and Kalman filter as the assimilation algorithm, the data assimilation technique is used to realize the regional ionospheric TEC reconstruction. The results show that the total electron content (TEC) and the vertical TEC reconstructed by the data assimilation method are in good agreement with the measured values Consistent. Compared with the NeQuick model and global ionospheric map (GIM) data, the average error and standard deviation of TEC obtained by data assimilation method are obviously reduced. The measured data verify the accuracy of data assimilation technique in TEC reconstruction reliability.