不同NeQuick电离层模型参数的应用精度分析

doi:10.11947/j.AGCS.2017.20160400

测绘学报 ›› 2017, Vol. 46 ›› Issue (4): 421-429.doi: 10.11947/j.AGCS.2017.20160400

不同NeQuick电离层模型参数的应用精度分析

王宁波^1,2, 袁运斌², 李子申¹, 李敏², 霍星亮²

1. 中国科学院光电研究院, 北京 100094;
2. 中国科学院测量与地球物理研究所大地测量与地球动力学国家重点实验室, 湖北武汉 430077

收稿日期:2016-08-08 修回日期:2017-03-07 出版日期:2017-04-20 发布日期:2017-05-05
通讯作者: 王宁波 E-mail:wangningbo@aoe.ac.cn
作者简介:王宁波(1987-),男,博士,研究方向为多模GNSS差分码偏差处理及电离层TEC建模。
基金资助:
国家重点研发计划（2016YFB0501905）；国家863计划（2014AA123503）；国家自然科学基金（41574033；41621091）

Performance Analysis of Different NeQuick Ionospheric Model Parameters

WANG Ningbo^1,2, YUAN Yunbin², LI Zishen¹, LI Min², HUO Xingliang²

1. Academy of Opto-Electronics, Chinese Academy of Sciences, Beijing 100094, China;
2. State Key Laboratory of Geodesy and Earth's Dynamics, Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430077, China

Received:2016-08-08 Revised:2017-03-07 Online:2017-04-20 Published:2017-05-05

摘要/Abstract

摘要： Galileo采用NeQuick作为全球广播电离层模型，其实际应用中以有效电离水平因子Az代替太阳活动指数作为NeQuick的输入参数，并利用二次多项式拟合得到广播星历中播发的3个电离层参数。本文在总结和讨论NeQuick模型参数估计方法及其变化特征的基础上，分别以全球电离层格网、GPS基准站及JASON-2测高卫星提供的电离层TEC为参考，分析不同NeQuick模型参数（包括以太阳活动参数F10.7为输入的NeQuick2、以本文解算参数为输入的NeQuickC和以Galileo广播电离层参数为输入的NeQuickG）在全球大陆及海洋地区的应用精度，并与GPS广播的Klobuchar模型对比。结果表明，NeQuickG在全球范围内的修正精度为54.2%~65.8%，NeQuickC的修正精度为71.1%~74.2%，NeQuick2的修正精度与NeQuickG相当，略优于GPS广播星历中播发的Klobuchar模型。

关键词: Galileo, NeQuick模型, 电离层延迟, 总电子含量

Abstract: Galileo adopts NeQuick model for single-frequency ionospheric delay corrections. For the standard operation of Galileo, NeQuick model is driven by the effective ionization level parameter Az instead of the solar activity level index, and the three broadcast ionospheric coefficients are determined by a second-polynomial through fitting the Az values estimated from globally distributed Galileo Sensor Stations (GSS). In this study, the processing strategies for the estimation of NeQuick ionospheric coefficients are discussed and the characteristics of the NeQuick coefficients are also analyzed. The accuracy of Global Position System (GPS) broadcast Klobuchar, original NeQuick2 and fitted NeQuickC as well as Galileo broadcast NeQuickG models is evaluated over the continental and oceanic regions, respectively, in comparison with the ionospheric total electron content (TEC) provided by global ionospheric maps (GIM), GPS test stations and JASON-2 altimeter. The results show that NeQuickG can mitigate ionospheric delay by 54.2%~65.8% on a global scale, and NeQuickC can correct for 71.1%~74.2% of the ionospheric delay. NeQuick2 performs at the same level with NeQuickG, which is a bit better than that of GPS broadcast Klobuchar model.

Key words: Galileo, NeQuick model, ionospheric delay, total electron content(TEC)

中图分类号:

P228

王宁波, 袁运斌, 李子申, 李敏, 霍星亮. 不同NeQuick电离层模型参数的应用精度分析[J]. 测绘学报, 2017, 46(4): 421-429.

WANG Ningbo, YUAN Yunbin, LI Zishen, LI Min, HUO Xingliang. Performance Analysis of Different NeQuick Ionospheric Model Parameters[J]. Acta Geodaetica et Cartographica Sinica, 2017, 46(4): 421-429.

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不同NeQuick电离层模型参数的应用精度分析

Performance Analysis of Different NeQuick Ionospheric Model Parameters

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