GPS转换为雷达坐标的误差分析

摘要

The conversion from GPS into radar polar coordinate is usually done in radar calibration. On the base of introducing the GPS accuracy and the model of GPS into radar polar coordinate, the effect of GPS error on the radar polar coordinate error has been studied in detail and the model has been given. Analysis on the effect of the changes of slant range, azimuth and pitch on the error of the coordinate conversion has been done under certain GPS error. The accuracy range of using ADS-B to calibrate radar is given under a certain precision in the GPS.%在ADS-B标校雷达设备时,通常要将ADS-B的GPS坐标转换为雷达的极坐标.在介绍GPS精度和GPS转换为雷达极坐标模型的基础上,详细分析了GPS误差大小对雷达坐标系下的误差影响,给出了具体模型.分析了在一定的GPS误差下,目标与雷达之间的斜距变化、方位变化和俯仰变化对转换误差大小的影响.实验结果给出了在GPS精度一定时,ADS-B标校雷达设备的精度范围.