Effects of Pseudolite Positioning on DOP in LAAS

Effects of Pseudolite Positioning on DOP in LAAS
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LAAS 中伪卫星定位对 DOP 的影响

DOI：
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发表时间：
2010
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影响因子：
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通讯作者：
A. D. Sarma
A. D. Sarma
中科院分区：
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文献类型：
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作者：
Q. Sultana;Dhiraj Sunehra;V. Srinivas;A. D. Sarma

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本文研究了伪卫星增强全球定位系统（GPS）对精度稀释（DOP）的影响。为此，通过在不同位置放置伪卫星来考虑典型的局部区域增强系统（LAAS）场景。发现只有适当定位伪卫星才能提高DOP。当两个伪卫星位于通道两侧时，DOP值最好。几何DOP （max）在仅GPS的情况下接近4，在两个伪卫星的增强下下降到约2。贝叶斯和卡尔曼滤波器在估计DOP值时的实现方面也进行了研究。
In this paper, effects on DOP (Dilution of Precision) due to augmentation of Global Positioning System (GPS) with pseudolites are investigated. For this purpose, a typical Local Area Augmentation System (LAAS) scenario is consi-dered by placing pseudolites in various positions. It is found that only properly located pseudolites can improve the DOP. DOP values with two pseudolites located on either side of the run way are found to be the best. Geometric DOP (max) was found to be nearly 4 due to only GPS and came down to approximately 2 due to augmentation with two pseudolites. Implementation aspects of Bayes and Kalman filters while estimating DOP values are also examined.