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Reliable Integer Ambiguity Resolution: Multi-Frequency Code Carrier Linear Combinations and Statistical A Priori Knowledge of Attitude

机译：可靠的整数歧义解析度：多频代码载波线性组合和统计的态度先验知识

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摘要

This paper provides two methods to improve the reliability of carrier phase integer ambiguity resolution: The first one is a group of multi-frequency linear combinations that include both code and carrier phase measurements, and allow an arbitrary scaling of the geometry, an arbitrary scaling of the ionospheric delay, and any preferred wavelength. The maximization of the ambiguity discrimination results in combinations with a wavelength of several meters and a noise level of a few centimeters. These combinations could be beneficial for both Real-Time Kinematics (RTK) and Precise Point Positioning (PPP). The second method incorporates some statistical a priori knowledge of attitude into the actual fixing. The a priori knowledge includes the length and direction of the baseline between two receivers and is given either as a uniform or Gaussian distribution. It enables a substantial reduction of the search space volume but also ensures a large robustness over errors in the a priori information. Both methods improve the accuracy of the float solution, which motivates a simple rounding for ambiguity fixing. A method is described, which enables an efficient computation of its success rate with a few integral transformations.
机译：本文提供了两种方法来提高载波相位整数模糊度分辨率的可靠性：第一种是一组多频率线性组合，包括代码和载波相位测量，并允许任意缩放几何形状，任意缩放电离层延迟以及任何首选波长。歧义鉴别的最大化导致具有几米的波长和几厘米的噪声水平的组合。这些组合对于实时运动学（RTK）和精确点定位（PPP）都是有益的。第二种方法将姿态的一些统计先验知识合并到实际定位中。先验知识包括两个接收器之间基线的长度和方向，并以统一或高斯分布的形式给出。它可以大大减少搜索空间的体积，但也可以确保对先验信息中的错误具有强大的鲁棒性。两种方法都提高了float解决方案的准确性，这促使进行简单的舍入以消除歧义。描述了一种方法，该方法能够通过一些积分变换有效地计算其成功率。

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  • 来源
    《Navigation》 |2012年第1期|p.61-75|共15页
  • 作者

    P. HENKEL; C. GUNTHER;

  • 作者单位

    Technische Universitat Munchen (TUM), Munich, Germany;

    German Aerospace Center (DLR), Oberpfaffenhofen, Germany;

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