大型障碍物影响下航向信标敏感区的划设

doi:10.12305/j.issn.1001-506X.2023.02.05

Abstract

Abstract:

The suggestions on the sensitive area of the localizer (LOC) of the instrument landing system are given by the International Civil Aviation Organization, but the influence of large obstacles is not considered, and the corresponding theoretical explanation is not provided. The operation level of the instrument landing system is being upgraded by the Civil Aviation Administration of China, so it is necessary to assess the influence of large buildings on this sensitive area. Focusing on the difference in depth of modulation (DDM) of the signal received by airborne LOC, the influence of LOC reflection signals, edge diffraction signals, and tip diffraction signals generated by large obstacles on DDM is analyzed and studied, DDM calculation model is established based on 20 elements double-frequency LOC array antenna, and the influence of large obstacles made of iron and cement on DDM at different positions is simulated and analyzed. The LOC sensitive area under the influence of large obstacles is obtained. The corresponding suggestions are provided for the modification of a hangar near a category Ⅲ runway in China.

Key words: instrument landing system, localizer (LOC), difference in depth of modulation (DDM), uniform geometric theory of diffraction, multipath interference

CLC Number:

V249.3

Yude NI, Yingli YU, Ruihua LIU, Zhe QIN, Kai WANG. Setting the sensitive area of localizer under the influence of large obstacles[J]. Systems Engineering and Electronics, 2023, 45(2): 360-372.

Figures/Tables 17

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序号	位置坐标		序号	位置坐标
序号	x	y	序号	x	y
1	1 000	50	10	3 500	200
2	1 000	100	11	3 500	270
3	1 000	160	12	3 500	380
4	1 000	230	13	4 100	50
5	2 500	50	14	4 100	150
6	2 500	150	15	4 100	210
7	2 500	220	16	4 100	270
8	2 500	310	17	4 500	30
9	3 500	50	18	4 500	50

Setting the sensitive area of localizer under the influence of large obstacles

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