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Algorithm and Flight Test Results to Exchange Code Noise and Multipath for Biases in Dual Frequency Differential GPS for Precision Approach

机译:双频差动GPS中用于偏差交换代码噪声和多径的算法和飞行测试结果,用于精确进场

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摘要

A modified Code Noise and Multipath (CNMP) algorithm is presented for dual-frequency differential GPS precision approach and landing. Pseudorange noise and multipath are exchanged for reducible biases in both reference station and aircraft ranging measurements. The second frequency is used only to correct the code-minus-carrier observable. Corrected pseudorange measurements are combined using a single-frequency carrier phase position domain smoothing (CPDS) algorithm. Flight test vertical and horizontal navigation system error is reduced from 0.80 m to 0.32 m and from 0.41 m to 0.33 m, respectively, as compared to Local Area Augmentation System single-frequency processing. For six included 150-s precision approaches, 95% error drops from 0.56 m to 0.26 m vertically and 0.28 m to 0.14 m horizontally. Composite protection levels (PLs) using CNMP-derived quantities are much smaller than modified LAAS PLs. Mean PL values are reduced from 5.90 m to 2.60 m vertically and from 3.24 m to 1.38 m horizontally.
机译:提出了一种改进的代码噪声和多径(CNMP)算法,用于双频差分GPS精确进近和着陆。在参考站和飞机测距测量中,伪距噪声和多径交换为可减少的偏差。第二频率仅用于校正可观察到的负码载波。使用单频载波相位位置域平滑(CPDS)算法组合校正后的伪距测量值。与本地增强系统单频处理相比,飞行测试垂直和水平导航系统的误差分别从0.80 m降低至0.32 m和从0.41 m降低至0.33 m。对于六个包括在内的150 s精度方法,其95%的误差从垂直方向的0.56 m降至0.26 m,水平方向的误差从0.28 m降至0.14 m。使用CNMP衍生的数量的复合保护级别(PL)比修改的LAAS PL小得多。平均PL值在垂直方向上从5.90 m减小到2.60 m,在水平方向上从3.24 m减小到1.38 m。

著录项

  • 来源
    《Navigation》 |2010年第3期|p.213-229|共17页
  • 作者单位

    Ohio University, Athens, OH 45701;

    Ohio University, Athens, OH 45701;

    Ohio University, Athens, OH 45701;

  • 收录信息 美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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