Radar altimeter low interception performance test method

Abstract

The invention discloses a radar altimeter low interception performance test method, aiming to provide a radar altimeter low interception performance test method with full test index, high test precision and low test cost. The invention is realized through the following technical scheme: sending complex scene simulation information to a radar altimeter complex scene simulator by using a control computer; outputting a generated echo signal to the radar altimeter to start the radio frequency control software; managing the radiation switch status of the radar altimeter in real time; analyzing theneed for effective radiant power when the radar altimeter is operating normally at anyone height in the altimetry range; determining the minimum radiant power under the premise of meeting the altimetry performance; sending a transmitting signal to a power meter through an antenna connected to a power divider; testing the transmitting signal of the radar altimeter; transmitting the radiant time andradiant power to a performance analysis computer; and performing analysis according to the radiation parameter measurement results of the power meter, and calculating to obtain the power control range, the step, the accuracy and an interception factor.

Description

technical field [0001] The invention relates to a method for testing the low intercept performance of a radar altimeter. Background technique [0002] Radar altimeter is an active remote sensing device, which uses radio technology to measure the vertical distance between the aircraft and the current earth's surface. It was initially used to measure the altitude of the aircraft above the ground, and then gradually expanded to other aspects, such as low-altitude navigation, terrain avoidance, etc. application. The radar altimeter uses the echo of its own transmitted signal to realize the altimetry function. The echo of the radar altimeter is formed by the backscattering and reflection of the electromagnetic waves radiated by the radar altimeter from the surface of the earth. The surface of the earth is the target of the radar altimeter. The wave is the surface target echo, which is much more complicated. The radar altimeter echo is related to the scattering characteristics ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the low interception performance of the current radar altimeter is difficult to accurately and quantitatively evaluate, and to provide a test with complete indicators, high test accuracy and low test cost, which can simulate complex scene echoes and quantitatively test radar Method of low interception performance of altimeter under radio frequency control software

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