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Analysis of Iridium-Augmented GPS for Floating Carrier Phase Positioning

机译:铱星增强型GPS用于浮动载波相位定位的分析

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摘要

Carrier-phase ranging measurements from Global Positioning System (GPS) and low-Earth-orbit-ing Iridium telecommunication satellites are integrated in a precision navigation system named iGPS. The basic goal of the system is to enhance GPS positioning and timing performance, especially under jamming. In addition, large satellite geometry variations generated by fast-moving Iridium spacecraft enable rapid estimation of floating cycle ambiguities. Augmentation of GPS with Iridium satellites also guarantees signal redundancy, which enables Receiver Autonomous Integrity Monitoring (RAIM). In this work, parametric models are developed for iGPS measurement error sources and for wide-area corrections from an assumed network of ground reference stations. A fixed-interval positioning and cycle ambiguity estimation algorithm is derived and a residual-based carrier-phase RAIM detection method is investigated for integrity against single-satellite step and ramp-type faults of all magnitudes and start-times. Predicted overall performance is quantified for various ground, space, and user segment configurations.
机译:来自全球定位系统(GPS)和低地球轨道铱铱电信卫星的载波相位测距测量被集成到一个名为iGPS的精密导航系统中。该系统的基本目标是增强GPS定位和定时性能,尤其是在干扰情况下。此外,快速移动的铱太空飞船产生的大型卫星几何形状变化可以快速估计浮动周期的歧义。铱星卫星增强GPS的功能还可以确保信号冗余,从而可以实现接收机自主完整性监控(RAIM)。在这项工作中,为iGPS测量误差源和从假设的地面参考站网络进行的广域校正开发了参数模型。推导了固定间隔的定位和周期模糊度估计算法,研究了基于残差的载波相位RAIM检测方法,以针对所有大小和起始时间的单卫星阶跃和斜坡型故障提供完整性。针对各种地面,空间和用户细分配置,对预测的总体性能进行了量化。

著录项

  • 来源
    《Navigation》 |2010年第2期|P.137-160|共24页
  • 作者单位

    Illinois Institute of Technology, Chicago, Illinois, 60616;

    rnIllinois Institute of Technology, Chicago, Illinois, 60616;

    rnIllinois Institute of Technology, Chicago, Illinois, 60616;

    rnCoherent Navigation, Inc., San Mateo, California, 94404;

  • 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
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