Radar Accuracy Analysis Method Based on Range Alignment

Abstract

The present invention proposes a radar accuracy analysis method based on distance alignment, which includes: the aircraft is equipped with positioning and navigation equipment to fly back and forth at a constant speed, the radar obtains the target track information of the aircraft; the radar obtains the aircraft track information, and obtains the positioning and navigation equipment records carried by the aircraft track information; convert the radar base station and aircraft track information into a station center coordinate system centered on the radar; compensate the aircraft track information data obtained by the radar and the aircraft track information data obtained by the positioning and navigation equipment; After comparing the aircraft track information data calculated by the radar with the real aircraft track information data, the error value calculated by the radar is solved, and the accurate data of the track information calculated by the radar echo is obtained by calculating the mean value and variance of the error. The invention can effectively eliminate the time error caused by echo time delay and system time delay, and achieve the purpose of improving the precision rate of radar precision analysis.

Description

technical field [0001] The invention belongs to the technical field of radar, in particular to a radar precision analysis method based on distance alignment. Background technique [0002] Before the pulse Doppler radar completes the factory inspection, it is often necessary to conduct qualitative and quantitative tests on the performance of the radar to evaluate whether the radar performance meets the specified requirements. Generally, an important indicator for pulse Doppler radar performance evaluation is radar The level of distance accuracy and angular accuracy. The existing radar accuracy analysis method is to fly a designated aircraft, carry GPS information on the aircraft, and then compare and analyze the various accuracy of the radar after time alignment of the aircraft track obtained by GPS and the target track information obtained by radar. There is a problem that is easy to be ignored in the above analysis method, that is, when the track information is time-calibr...

AI Technical Summary

Problems solved by technology

The existing radar accuracy analysis method is to fly a designated aircraft, carry GPS information on the aircraft, and then compare and analyze the various accuracy of the radar after time alignment of the aircraft track obtained by GPS and the target track information obtained by radar. There is a problem that is easy to be ignored in the above analysis method, that is, when the track information is time-calibrated in the radar, due to the echo delay and the delay in the processing process of the radar signal processor, the time is relative to the GPS UTC time. A certain delay, which leads to a certain error in the accuracy analysis results of the final alignment based on time information

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