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首页> 外文会议>Proceedings of the national technical meeting : "Vision 2010: Present and future" >Analysis of Probability of Misleading Information for LAAS Signal in Space
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Analysis of Probability of Misleading Information for LAAS Signal in Space

机译：空间LAAS信号误导信息的概率分析。

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摘要

The FAA's Local Area Augmentation System (LAAS) is said to be providing misleading information when integrity checks at the LAAS ground facility (LGF) and a vertical protection level (VPL) computed in the user aircraft allow the navigation system error to exceed acceptable limits without removing erroneous information or generating an alert. This paper presents a detailed analysis of thernprobability of misleading information (P_MI) in case of failure of one or two ground reference receivers. Performance is computed as a function of the size of the position error due to using corrections from a failed receiver. Results show that the aircraft VPL check alone provides a P_MI which peaks at the design value and is significant only over a narrow range of position errors, independent of satellite geometry. Thus, a simpler previous analysis is conservative and aircraft VPL parameters documented in the LAAS MASPS [1] actually provide significant P_(MI)performance margin. Consequently, the tolerable a priori probability of LGF reference receiver failure may be larger than originally assumed. P_(MI) margin is also provided at good geometries by LGF integrity monitoring, which limits differential correction errors to a level lower than the effective threshold of the aircraft VPL check.
机译：当对LAAS地面设施（LGF）的完整性检查和用户飞机上计算的垂直保护水平（VPL）允许导航系统误差超过可接受的极限而没有任何误差时，FAA的本地增强系统（LAAS）会提供误导性信息删除错误信息或生成警报。本文对一两个地面参考接收机发生故障的情况下的误导性信息（P_MI）的可能性进行了详细分析。由于使用了故障接收器的校正，因此性能是根据位置误差的大小来计算的。结果表明，飞机的VPL检查单提供了一个P_MI，该P_MI达到设计值的峰值，并且仅在狭窄的位置误差范围内才有意义，而与卫星的几何形状无关。因此，较简单的先前分析是保守的，LAAS MASPS [1]中记录的飞机VPL参数实际上提供了可观的P_（MI）性能余量。因此，LGF参考接收机故障的可容忍先验概率可能大于原始假设。 LGF完整性监控还可在良好的几何形状下提供P_（MI）余量，从而将差分校正误差限制在低于飞机VPL检查的有效阈值的水平。

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