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基于CIT技术的广域增强系统电离层延迟修正算法

DOI: 10.11728/cjss2015.05.541, PP. 541-548

Keywords: 电离层延迟修正,广域增强系统,电离层层析成像,网格算法

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Abstract:

提出了一种基于电离层层析成像(CIT)技术的广域增强系统(WAAS)电离层延迟修正算法.该算法利用模式基函数与截断奇异值分解正则化组合的方式,实现WAAS单频用户的电离层延迟误差修正.基于中国区域23个广域基准站和10个用户站的仿真结果分析表明,传统的网格算法和基于CIT技术的电离层延迟修正算法的电离层延迟修正精度与太阳活动、昼夜变化及地磁纬度之间均存在明显的相关性.基于CIT技术的电离层延迟修正算法精度优于网格算法,CIT算法的平均误差与标准差相比网格算法均有较大幅度的下降.

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