通过调用计算雷达的信噪比，对比雷达在三咱不同雷达截面积下的信噪比，从而分析不同雷达截面积下信噪比情况是如何的，得出相应结论-Calculated by calling the radar signal-to-noise ratio than radar signal-to-noise ratio in the three Zan different radar cross section, which is how to analyze the signal-to-noise ratio in a different radar cross section, draw the corresponding conclusions