浅地层探地雷达方位分辨率衡量方法研究

Research on the azimuth resolution determination methodof a shallow-ground penetrating radar

由于探地雷达的方位分辨率与天线特性、所采用的信号处理算法、土壤特性等都有很大关系,所以衡量探地雷达的方位分辨率非常困难,也很难用一个公式对一部探地雷达的方位分辨率进行充分地衡量。从工程实用的角度,针对浅地层探地雷达回波的特性,提出一种利用A扫描能量图衡量浅地层探地雷达方位分辨率的方法,并论证了其合理性。该方法可以很方便用来衡量浅地层地雷达的方位分辨率,而且也可以用来衡量合成孔径算法的优劣。

The azimuth resolution of a subsurface GPR system is important when localized targets are sought. As the azimuth resolution of a subsurface GPR system is determined by the characteristics of the antenna, the bandwidth of the radar, the signal processing algorithm employed, the characteristics of soil, etc., it is very difficult to measure the azimuth resolution of a GPR system and it is not enough to use a single formula to scale it. A solution to measure the azimuth resolution by the energy graphics of A-scan is proposed. With this method it is very convenient to scale the azimuth resolution, and the method can be used to determine the performance of the SAR arithmetic.