利用相位平滑伪距和最小二乘曲面函数建立西安市区域电离层延迟模型
Establishment of Regional Ionospheric Delay Model in Xi'an Based on Phase Smoothing Pseudo-Range and LS Surface Function
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摘要: 利用相位平滑伪距观测值,并采用附有限制条件的序贯最小二乘曲面拟合方法,研究构建了西安区域电离层延迟模型。该模型的内符合平均精度为6.9 cm,外符合平均精度为8.8 cm,通过与全球格网电离层延迟模型计算的电子含量进行对比,并将两种模型进行单频PPP定位测试。结果显示,区域电离层延迟模型的精度明显优于格网电离层延迟模型的精度。Abstract: With phase smoothing pseudo-range observed value,a regional ionospheric delay model is established by sequential least squares surface fitting with restrictive conditions.As a result,the average inner precision of the model is 6.9 cm,while the average outer precision is 8.8 cm.We also compare with the electron content calculated by global grid ionospheric delay model.Single frequency-PPP test of the two models have also done,the results show that the precision of regional ionospheric delay model is obviously superior to that of global grid ionospheric delay model.
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