| 基于球谐函数模型的电离层预报 |
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| 引用本文： | 周伟莉,李素华,蒋美霞.基于球谐函数模型的电离层预报[J].测绘信息与工程,2012,37(3):3-5. |
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| 作者姓名： | 周伟莉 李素华 蒋美霞 |
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| 作者单位： | 1. 山东科技大学测绘科学与工程学院,青岛市前湾港路579号,266590
2. 菏泽市测绘院,菏泽市华英路北段,274000 |
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| 摘 要： | 据球谐函数模型系数的特点,采用ARMA(p,q)模型对球谐函数模型系数进行预报,由球谐函数模型计算电离层VTEC。提出了针对某一时刻球谐系数进行预报的方法,相比传统按照时刻顺序的预报,预报时间大大延长,预报精度也有所提高。试验结果表明,相比中高纬度地区,低纬度地区预报精度偏低,同时,一天中不同时刻预报结果有所差别,前半天的预报效果明显好于后半天。
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| 关 键 词： | 球谐函数 ARMA 总电子含量 电离层预报 |
Ionospheric Forecast Based on Spherical Harmonic Function Model |
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| ZHOU Weili,LI Suhua,JIANG Meixia.Ionospheric Forecast Based on Spherical Harmonic Function Model[J].Journal of Geomatics,2012,37(3):3-5. |
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| Authors: | ZHOU Weili LI Suhua JIANG Meixia |
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| Institution: | 1 Shandong University of Science and Technology Geomatics College,579 Qianwangang Road,Qingdao 266590,China; 2 Heze Institute of Surveying and Mapping,Northbound Paragraph,Huaying Road,Heze 274000,China) |
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| Abstract: | Based on the spherical harmonic coefficients characteristics of the model,we use the ARMA（p,q） model to predict spherical harmonic coefficients.Then VTEC is calculated by the spherical harmonic function model.A new method to predict spherical harmonic coefficients is proposed.Compared to the traditional method,forecast time is greatly extended,forecast accuracy is also improved.Results show that the forecast accuracy is lower in low latitudes comparing to middle and high latitudes.Meanwhile,the prediction results at different times of day have different results,forecast effect in the former half of the day is better than that in later. |
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| Keywords: | spherical harmonics ARMA total electron content ionosphere forecast |
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