Pulse Doppler radar north-seeking method and system and storage medium

Abstract

The invention provides a pulse Doppler radar north-seeking method which comprises the following steps: acquiring a radar echo track of a radar upper computer, and determining a radar coarse azimuth angle; setting an aircraft to tangentially pass through a radar beam along the radar coarse azimuth angle, and obtaining radar track under a radar coordinate system and aircraft GPS track and radar latitude, longitude and height information under a geodetic coordinate system; calculating the distance, the pitch angle and the azimuth angle of the GPS track of the aircraft taking the radar as the origin under a station center coordinate system according to the GPS track of the aircraft under the geodetic coordinate system; aligning UTC time of the radar track with UTC time of the GPS track according to a calculated result, and calculating the average value of the difference between the radar azimuth angle and the GPS azimuth angle of the aircraft at the same time; and executing the steps for many times, obtaining an average value of the plurality of azimuth angle difference values, and averaging the average value of the plurality of azimuth angle difference values to obtain an included angle between the radar and the due north direction. According to the invention, the north-seeking function of the radar is realized.

Description

technical field [0001] The invention belongs to the technical field of radar, and in particular relates to a north-seeking method, system and storage medium of a pulse Doppler radar. Background technique [0002] With the continuous development of high-tech technology, China is becoming one of the fastest-growing markets for the global satellite positioning and navigation system (GPS) industry. As a medium-distance circular orbit satellite navigation system, GPS can provide accurate positioning, speed measurement and high-longitude time standards for most of the earth's surface (98%), and can meet military requirements anywhere in the world or in near-earth space. Users need to continuously and accurately determine the three-dimensional position, three-dimensional movement and time. At the same time, with the development of large-scale integrated circuits and digital processing technology, pulse Doppler radar is widely used in airborne early warning, navigation, missile gui...

AI Technical Summary

Problems solved by technology

Therefore, the radar system is generally equipped with a set of inertial navigation system or north finder and other equipment with north-finding function. In the absence of this equipment, the radar will not be able to correctly output the angle between the radar detection target and the true north direction, thus Affect subsequent target detection, tracking, and strike operations

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