Unaugmented GPS-Based Flight Inspection System
Unaugmented GPS-Based Flight Inspection System
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DOI：
10.1109/taes.2010.5461651
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发表时间：
2010-05
影响因子：
4.4
通讯作者：
Euiho Kim;T. Walter;J. Powell
中科院分区：
文献类型：
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作者：
Euiho Kim;T. Walter;J. Powell
介绍了一种基于全球定位系统（GPS）的非增强飞行检测系统（FIS），用于仪表着陆系统（ILS）的机载检测。这种新颖的系统依赖于电视定位系统（TVPS）和雷达高度计（RA），该系统测量跑道阈值以上的水平位置，以确定能够消除GPS偏差的参考点。由于飞行检查的近实时性质，即使参考点发生在轨迹完成之后，也可以重建准确的接近轨迹。采用精确相对定位（PRP）算法实现了理想的定位效果。它包括对电离层误差的一阶拟合，基于代码和载波测量，可以显着减少该误差源。该系统具有自主完整性功能，称为FIS-RAIM（接收机自主完整性监测），该系统配备了该功能，以防止GPS卫星故障可能导致重大定位错误。FIS-RAIM是专门为飞行检查问题而设计的，它的许多细节也被描述了。实验飞行测试表明，该系统架构和算法能够满足III型盲降的FIS精度要求，在成本和效率方面优于现有的飞行检测系统。该系统不依赖于任何GPS增强系统；因此，基于gps的非增强FIS具有低成本、高效率和全球可用性。
A unaugmented Global Positioning System (GPS)-based flight inspection system (FIS) that performs airborne inspection of the instrument landing system (ILS) is introduced. This novel system relies on a TV positioning system (TVPS) that measures the horizontal position over the runway threshold and a radar altimeter (RA) to determine a reference point that is able to remove the GPS biases. Because of the near-real-time nature of flight inspection, it is possible to reconstruct an accurate approach trajectory even though the reference point occurs after the completion of the trajectory. The precise relative positioning (PRP) algorithm is applied to achieve the desired results. It includes a first-order fit to the ionospheric error, based on code and carrier measurements, that enables a significant reduction in this error source. This system has an autonomous integrity feature, called FIS-RAIM (receiver autonomous integrity monitoring), that is equipped in this system to protect against GPS satellite failures that may cause significant positioning errors. The FIS-RAIM is specifically designed for a flight inspection problem, and much of its detail is also described. Experimental flight tests strongly suggest that the system architecture and algorithm could meet FIS accuracy requirements for CAT III ILS with better performance than current flight inspection systems in terms of cost and efficiency. The system is not dependent on any GPS augmentation system; therefore the unaugmented GPS-based FIS provides low cost and high efficiency with worldwide availability.