| 基于北斗GEO的电离层延迟修正方法比较与分析 |
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| 引用本文： | 薛凯敏,刘瑞华,王剑.基于北斗GEO的电离层延迟修正方法比较与分析[J].全球定位系统,2018,43(2):33-39. |
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| 作者姓名： | 薛凯敏 刘瑞华 王剑 |
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| 作者单位： | 中国民航大学,电子信息与自动化学院,天津300300 |
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| 摘 要： | 电离层延迟是影响导航定位精度的最主要因素。北斗卫星导航系统采用Klobuchar模型修正单频接收机用户的电离层延迟误差,对于双频接收机,可以利用不同频率信号的伪距观测数据解算得到电离层延迟值。为比较两种方法在天津地区的电离层延迟修正效果,利用NovAtel GPStation6接收机(GNSS电离层闪烁和TEC监测接收机)采集到的卫星实测数据进行计算。以国际全球导航卫星系统服务组织(IGS)发布的全球电离层格网数据为参考,对两种方法的修正效果进行比较分析。结果表明,在天津地区,利用双频观测值解算电离层延迟比Klobuchar模型计算结果更加精确,且平均每天的修正值达到IGS发布数据的82.11％,比Klobuchar模型计算值高948％
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| 关 键 词： | 北斗卫星导航系统 电离层延迟 Klobuchar模型 双频观测值 |
Comparison and Analysis of Ionospheric Delay Correction Methods Based on BeiDou GEO |
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| Institution: | XUE Kaimin, LIU Ruihua,WANG Jian |
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| Abstract: | Ionospheric delay is the most important factor affecting the accuracy of navigation and positioning. The BeiDou satellite navigation system uses the Klobuchar model to correct the ionospheric delay error of single frequency receiver users. For dual frequency receivers, the ionospheric delay value can be calculated by using pseudo range observations data of different frequency signals.. In order to compare the correction effect of ionospheric delay of two methods in Tianjin area, the satellite measured data collected by NovAtel GPStation6 receiver (GNSS Ionospheric Scintillation and TEC Monitor Receiver) are used to calculate. Taking the global ionosphere grid data published by the International GNSS Service (IGS) as a reference, the correction effect of the two methods are compared and analyzed. The results show that in the Tianjin area, the ionospheric delay calculated by the dual frequency observations is more accurate than the Klobuchar model, and the average daily correction is 82.11％ of IGS, 9.48％ higher than that of Klobuchar model. |
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