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首页> 外文会议>ION National Technical Meeting >RAIM FDE Revisited: A New Breakthrough In Availability Performance With NIORAIM (Novel Integrity-Optimized RAIM)
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RAIM FDE Revisited: A New Breakthrough In Availability Performance With NIORAIM (Novel Integrity-Optimized RAIM)

机译：Raim FDE重新讨论：利用Nioraim的可用性表现的新突破（新颖的完整性优化的Raim）

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摘要

The major shortcoming of RAIM FDE is widely recognized to be its occasional lack of availability, in the sense that the integrity level it can protect in any given situation cannot always be smaller than the required alert limit for a given flight operation. Ever since the RAIM FDE algorithms were developed, accepted and published more than ten years ago, the system availability has been bound, by and large, to the limitations of its monitoring mechanism to be able to detect and exclude a single measurement fault. More recently, there has been a proposition that departs from conventional assumptions made in the standard RAIM-FDE by better balancing accuracy and integrity levels. This proposition results in the lowering of the horizontal integrity limit for all satellite measurement geometries, thereby improving system availability in the process. In this paper, we present a specific methodology called NIORAIM for accomplishing the balancing of position accuracy with integrity, and we also give an estimate of the improvement achieved with the method. The results in this paper show, for the NPA phase of flight where baro-aiding is available, that 50% of the unavailable geometries derived using standard RAIM-FDE can be salvaged when using NIORAIM. The paper also shows the added complexity involved in computing the NIORAIM algorithm, but presents a design that is still amenable to real-time computation.
机译：Raim FDE的主要缺点被广泛认识到其偶尔缺乏可用性，因此在任何特定情况下可以保护的完整性水平不能总是小于给定飞行运行所需的警报限额。自从Raim FDE算法开发，接受并发布十多年前以来，系统可用性受到其监测机制能够检测和排除单个测量故障的限制。最近，通过更好的平衡准确度和完整性水平，有一个提出从标准Raim-FDE中的传统假设。该命题导致所有卫星测量几何形状的水平完整性极限降低，从而提高了该过程中的系统可用性。在本文中，我们介绍了一种称为Nioraim的特定方法，用于完成与完整性的定位准确性的平衡，我们还估计了该方法实现的改进。本文的结果显示，对于可用的巴拿及可用的航班NPA阶段，使用Nioraim时，可以挽救50％的使用标准Raim-FDE导出的不可用几何。本文还显示了计算Nioraim算法所涉及的添加复杂性，但呈现了仍然适用于实时计算的设计。

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