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  ionospheric delay
    AN IMPROVED GRID-BASED CORRECTION ALGORITHMS FOR THE IONOSPHERIC DELAY IN WAAS
    改进的WAAS电离层时延网格修正算法
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  ionospheric delay
    AN IMPROVED GRID-BASED CORRECTION ALGORITHMS FOR THE IONOSPHERIC DELAY IN WAAS
    改进的WAAS电离层时延网格修正算法
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Considering the Ionospheric TEC incline, We have given an improved Grid-based Correction Algorithm for ionospheric delay in Wide Area Augmentation System (WAAS). After computing with GPS data, we have got that the variance is 1/2 reduced compared with original Grid-based Correction Algorithm.

在考虑电离层倾斜的基础上给出了一套改进的广域增强系统电离层时延网格算法,并通过模拟数据和GPS实测数据与原方法进行了分析比较,结果表明,同样条件下不考虑倾斜时产生的方差为考虑倾斜度时的2倍.

The correction method of additional time delay caused by ionosphere and atmosphere plays a more and more important role in satellite timing and positioning system. In many radio projects which using electromagnetic wave as a measuring tool have to deal with the additional time delay, such as GPS, LADGPS, WADGPS and WAAS. In this paper, a new additional time delay algorithm model for a sparsely observation station region in WAAS is established and studied.Based on the improved grid-based correction algorithm...

The correction method of additional time delay caused by ionosphere and atmosphere plays a more and more important role in satellite timing and positioning system. In many radio projects which using electromagnetic wave as a measuring tool have to deal with the additional time delay, such as GPS, LADGPS, WADGPS and WAAS. In this paper, a new additional time delay algorithm model for a sparsely observation station region in WAAS is established and studied.Based on the improved grid-based correction algorithm for ionospheric delay in WAAS[4] and the model given in this paper, after numerical simulating with GPS data, the result was obtained showing that the precision of new algorithm is better than original one in the case of sparsely observation station region.

在改进的广域增强系统电离层时延网格算法的基础上,给出了针对观测量比较少的地区比较适用的电离层时延网格修正算法,并通过模拟数据和GPS实测数据与原方法进行了分析比较.结果表明,在观测站稀疏的情况下,本文的计算方法模式的精度比原方法有较大的提高.

 
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