Method and device for carrying out airborne downward-looking measurement calibration by using active calibration equipment

Abstract

The invention relates to a method and a device for carrying out airborne downward-looking measurement calibration by using active calibration equipment. The method comprises the following steps of analyzing a calibration working scene of a measurement system and a corresponding index of the measurement system, determining the receiving power range, the link gain and the equipment delay time of the active calibration equipment, determining a conversion relation between the active calibration equipment link gain and the passive standard body RCS value according to the radar equation, and determining the RCS of the measured data by using a relative comparison method according to the radar equation. According to the method, due to the fact that background clutters during calibration are restrained, the precision of airborne downward-looking measurement data is improved, the same active calibration equipment can replace passive standard bodies of various specifications, external field application is light and flexible, and the method has important engineering application value.

Description

technical field [0001] The invention relates to the technical field of radar measurement calibration, in particular to a calibration method and device for airborne down-look measurement using active calibration equipment. Background technique [0002] The airborne down-looking measurement can obtain the electromagnetic scattering characteristic data of the target located on the ground or the sea surface in different azimuths. The extensive application of strike weapons makes the role of airborne downsight measurement more and more prominent in the study of ground-sea target characteristics. [0003] Calibration is an essential step in airborne downsight measurement, and its accuracy is directly related to the accuracy of the measurement target data. At present, airborne down-looking measurements mostly use multiple passive standard bodies for calibration, which are seriously interfered by background clutter, and in-depth research on target characteristics requires higher an...

AI Technical Summary

Problems solved by technology

At present, airborne down-looking measurements mostly use multiple passive standard bodies for calibration, which are seriously interfered by background clutter, and in-depth research on target characteristics requires higher and higher accuracy of down-looking measurement data. The passive standard body calibration method can no longer meet the accuracy requirements of the downward-looking measurement for the calibration data

[0004] Therefore, in view of the above deficiencies, it is necessary to provide a calibration method and device for airborne downsight measurement using active calibration equipment, so as to solve the background clutter interference problem caused by the passive standard body used in the airborne downsight measurement calibration in the past.

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