Civil aviation navigation equipment sight distance coverage analysis method combined with flight path variable height

Abstract

The invention discloses a civil aviation navigation equipment sight distance coverage analysis method combined with variable height of a flight path, belongs to the technical field of civil aviation navigation equipment, and solves the problem that the flight safety cannot be ensured due to the absence of a method for carrying out sight distance coverage analysis on a variable height flight path in the prior art. The method comprises the following steps: S1, calculating azimuth angles B of all obstacles relative to navigation equipment by taking true north as 0 degree; s2, screening obstacles in the same direction as the flight path; and S3, calculating whether the n obstacles shield the flight path or not, and calculating the shielding position. The invention provides a method for calculating the shielding of the obstacle to the variable-height flight path for the first time, which comprises the specific shielding position, namely the critical position of the received signal from existence to absence, and the signal coverage condition on the flight path after shielding, so that a reference basis is provided for the height control of the obstacle and the adjustment of the flight height of the aircraft; and the flight safety is powerfully ensured.

Description

technical field

[0001] The invention belongs to the technical field of civil aviation navigation equipment, and in particular relates to a sight range coverage analysis method for civil aviation navigation equipment combined with flight track variable altitude. Background technique

[0002] Civil aviation ground-based navigation equipment mainly provides guidance for aircraft flight, such as omnidirectional beacons, which provide guidance for aircraft on the route and when they fly in and out of the field, while the instrument landing system provides localizer and glideslope guidance for aircraft approach, so that The aircraft aligns with the runway and descends at a defined glide angle until landing. Since the ground-based navigation equipment is a radio equipment, the electromagnetic wave signal emitted by the equipment and the signal received by the aircraft airborne equipment are easily affected by terrain and buildings. If encountering high obstacles, such as mountains ...

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