| 基于数据融合的电离层VTEC反演精度分析 |
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| 引用本文： | 郭承军,吴玉飞.基于数据融合的电离层VTEC反演精度分析[J].天文学报,2019,60(3):44-53. |
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| 作者姓名： | 郭承军 吴玉飞 |
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| 作者单位： | 电子科技大学电子科学技术研究院;电子科技大学通信抗干扰技术国家级重点实验室 |
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| 摘 要： | 随着空间目标活动和卫星导航系统的增多,观测电离层数据的途径越来越多,探测精度也越来越高.在Kalman滤波的基础上,利用2016年的国际参考电离层(IRI-2016)模型中电离层垂直电子含量(Vertical Total Electron Content, VTEC),结合地基反演得到的VTEC值,利用数据融合算法提高电离层VTEC的近实时反演精度.针对加拿大附近高纬度区域(130°W–150°W, 60°N–70°N)、朝鲜、韩国和日本周边中纬度区域(115°E–135°E, 32.5°N–42.5°N)、洪都拉斯和危地马拉附近低纬度区域(80°W–100°W, 10°N–20°N)进行了观测,比较发现地基反演和数据融合技术得到的电离层VTEC精度都比较高,但是数据融合得到的电离层VTEC在3个区域的精度都明显更好.该算法能够很好地应用在地面基准站数量较多的区域,同时也能应用在地面基准站数量较少或者海洋、沙漠等布设地面基准站不方便的区域,提高电离层VTEC的精度.
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| 关 键 词： | 数据融合 Kalman滤波 IRI-2016 地基GPS 电离层VTEC |
| 收稿时间： | 2019/1/8 0:00:00 |
| 修稿时间： | 2019/2/27 0:00:00 |
Inversion Accuracy Analysis of Ionospheric VTEC Based on Data Fusion |
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| GUO Cheng-jun and WU Yu-fei.Inversion Accuracy Analysis of Ionospheric VTEC Based on Data Fusion[J].Acta Astronomica Sinica,2019,60(3):44-53. |
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| Authors: | GUO Cheng-jun and WU Yu-fei |
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| Institution: | Research Institute of Electronic Science and Technology, University of Electronic Science and Technology of China, Chengdu 611731;National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu 611731 and Research Institute of Electronic Science and Technology, University of Electronic Science and Technology of China, Chengdu 611731 |
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| Abstract: | With the increase of space target activities and satellite navigation systems, there are more and more ways to observe ionospheric data, and the detection accuracy is also higher and higher. Based on the Kalman filter, this paper uses the IRI-2016 ionospheric vertical total electron content (VTEC), and combined with the VTEC value obtained from the ground-based inversion, and the data fusion algorithm to improve the near-real-time inversion accuracy of the ionospheric VTEC. This paper observes the high-latitude area near Canada (${130^ \circ |
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| Keywords: | data fusion Kalman filter IRI-2016 foundation inversion ionospheric VTEC |
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