Radar precision analysis method based on distance alignment

Abstract

The invention provides a radar precision analysis method based on distance alignment, and the method comprises the steps: allowing an aircraft to carry positioning and navigation equipment and fly back and forth at a constant speed, and obtaining the target trace point information of the aircraft by a radar; obtaining flight path information of the aircraft by the radar and obtaining flight path information recorded by the positioning and navigation equipment carried by the aircraft; converting a radar base station and the flight path information of the aircraft into a station center coordinate system taking the radar as a circle center; compensating the aircraft flight path information data obtained by the radar and the aircraft fight path information data obtained by the positioning andnavigation equipment; and comparing the compensated aircraft flight path information data measured and calculated by the radar with aircraft real flight path information data, solving an error value measured and calculated by the radar, and obtaining radar echo calculation flight path information accurate data by solving a mean value of errors and a variance. Time errors caused by echo time delayand system time delay can be effectively eliminated, and the purpose of improving the radar precision analysis precision is achieved.

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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