基于小波多分辨探地雷达逆时偏移处理

Ground Penetrating Radar Reverse Time Migration Processing Based on MultiResolution of Wavelet

摘要:

从Maxwell方程出发,利用导出的多分辨分解理论与中心差分格式,推导出小波多分辨探地雷达逆时偏移处理算法,并开发了相应的处理程序.与常规的Kirchhoff积分偏移法、15°有限差分偏移法处理后的雷达资料相比较,小波多分辨探地雷达逆时偏移处理算法具有对反射波归位准确、偏移结果精度高、成像效果好、无偏移倾角限制、对噪声具有很强适应能力的优点,可大幅度提高雷达剖面的分辨率,更好地指导探地雷达剖面的地质解释.

Abstract:

Based on Maxwell equation,multiresolution of wavelets reverse time migration algorithm of GPR is derived according to the wavelet multiresolution decomposition theory and central difference format.The corresponding processing program is developed thereafter.Comparison of the radar data processing outcome by regulations Kirchhoff integration migration and 15° finite difference migration algorithm shows that the multiresolution of wavelets reverse time migration algorithm of GPR enjoys the merits that reflection wave returns to original position more accurately,migration outcome is more precise,imaging effection is all the better,there is no limitation to migration angle of inclination,and it is highly adaptable to noise.It can be enhanced dramatically by the algorithm,and can better serve the geological explanation of GPR section.