Application and Research Of Mapping Function Method In Radar Target Positioning System

In the radar positioning system, the unevenness of the atmospheric medium causes the deflection of the electromagnetic wave in the propagation process, which reduces the positioning accuracy of the radar, so it is necessary to correct the atmospheric refraction error for the radar's positioning requirement of fast positioning and high precision. Based on the method of correcting atmospheric refraction error by mapping function, the target's distance is regarded as the product of mapping function and altitude, and the application of mapping function in radar target positioning system is studied in order to reduce the complexity of positioning method and the dependence on atmospheric parameters, and an inversion method is used to study the change trends of mapping function's coefficients with altitude. Using the radar positioning environment established by Hopfield model, and taking the calculation result of raying tracing method as the radar observation data, the method's accuracy is studied. The results show that the mapping function method has research and application value in locating high elevation targets, and the accuracy of the positioning method is determined by the altitude and elevation angle of target. At a certain altitude, the closer the target is, the larger the elevation angle is, the smaller the positioning error is and the better the positioning effect is.