利用IGS站的实测数据,采用最小二乘多项式模型建立中国区域电离层延迟模型。由于该模型各时段间连续性不强,故对其附加时空域上的限制条件。结果表明,附有限制条件的多项式模型保证了模型的连续性,在一定程度上能更好地反映电离层随时间的变化特性。采用该模型,研究分析中国区域电离层的周日、季节变化特性。
Using the observed data of IGS stations, a Chinese regional ionospheric delay model is established using a least squares polynomial model with restrictive conditions. Additional restrictive conditions are im- posed in the spatiotemporal domain on the model, in order to improve the model's continuity. As a result, the polynomial model with restrictive conditions can somewhat more accurately reflect the time-varying char- acteristics of the ionosphere. We can use the model research and analysis to determine diurnal variation anc seasonal variation characteristics of region ionospheric delay in China.