Automatic tracking method of airborne downward-looking measurement target

Abstract

The invention relates to an automatic tracking method of an airborne downward-looking measurement target. The method includes the following steps that: S1, the location information of an aircraft and the target are obtained, and the first coordinates of the target after the origin of a geocentric coordinates system is shifted to the location of the aircraft is determined according to the location information; S2, the attitude information of the aircraft is obtained, the first coordinates of the target are converted into fourth coordinates in an aircraft body downward coordinate system according to the attitude information; and S3, the azimuth angle and pitching angle of a radar antenna are determined based on the fourth coordinates of the target, and the pointing direction of the radar antenna is adjusted according to the azimuth angle and pitching angle. With the automatic tracking method of the invention adopted, the pointing direction of the beams of the antenna can be automatically adjusted in real time, and it can be ensured that the measured target is always at the center of the main beams of the antenna, and a servo control rod is not required to be manually operated to align the target, and therefore, the efficiency and accuracy of airborne downward-looking measurement can be significantly improved.

Description

technical field [0001] The invention relates to the technical field of signal feature control, in particular to an automatic tracking method for an airborne down-looking measurement target. Background technique [0002] The technical background related to the present invention will be described below, but these descriptions do not necessarily constitute the prior art of the present invention. [0003] In recent years, because the airborne downward looking measurement system can obtain the electromagnetic scattering characteristic data of the measured target in all directions and under the condition of large grazing angle, it has received extensive attention. In the process of airborne down-looking measurement, the carrier aircraft and the target are in relative motion. In order to ensure the accuracy of the measurement, it is necessary to ensure that the airborne measurement radar antenna is always aligned with the target. [0004] The airborne down-looking measurement rada...

AI Technical Summary

Problems solved by technology

However, because the aircraft platform is easily affected by airflow disturbances when flying in the air, especially under severe weather conditions, the attitude of the aircraft is unstable, and in addition to the complexity of the cabin environment of the aircraft during the flight, it poses a great challenge to manual operation. challenge

[0005] Therefore, there is a need in the prior art for a solution that can solve the problem of poor measurement accuracy of manual tracking targets due to the aircraft platform being easily disturbed by airflow when flying in the air

Images