Kirchhoff Migration Method for Tube Detection with UWB GPR

2021 ◽  
Author(s):  
Vadym Plakhtii ◽  
Oleksandr Dumin ◽  
Oleksandr Pryshchenko
Keyword(s):  
Kirchhoff Migration ◽  
Migration Method

scholarly journals Combination of Kirchhoff migration method and the energy diagram in the process of ground penetrating radar data

2015 ◽  
Vol 18 (4) ◽  
pp. 42-50
Author(s):  
Van Thanh Nguyen ◽  
Thuan Van Nguyen ◽  
Trung Hoai Dang
Keyword(s):  
Ground Penetrating Radar ◽  
High Reliability ◽  
Theoretical Models ◽  
Radar Data ◽  
Velocity Estimation ◽  
Energy Diagram ◽  
Subsurface Structures ◽  
Kirchhoff Migration ◽  
Migration Method ◽  
Ground Penetrating

Kirchhoff migration in ground penetrating radar (GPR) has been the technique of collapsing diffraction events on unmigrated records to points, thus moving reflection events to their proper locations and creating a true image of subsurface structures. Today, the scope of Kirchhoff migration has been broadened and is a tool for electromagnetic wave velocity estimation. To optimize this algorithm, we propose using the energy diagram as a criterion of looking for the correct propagation velocity. Using theoretical models, we demonstrated that the calculated velocities were the same as the root mean square ones up to the top of objects. The results verified on field data showed that improved sections could be obtained and the size as well as depth of anomalies were determined with high reliability.

scholarly journals Imaging Internal Defects with Synthetic and Experimental Data

2019 ◽  
Vol 2019 ◽  
pp. 1-13
Author(s):  
Hongwei Zhou ◽  
Guanghui Hu ◽  
Ling Ma
Keyword(s):  
Experimental Data ◽  
Electromagnetic Scattering ◽  
Scattering Problem ◽  
Quantitative Agreement ◽  
Internal Defects ◽  
Electromagnetic Pulses ◽  
Kirchhoff Migration ◽  
Transient Electromagnetic ◽  
Multiple Input ◽  
Migration Method

This work concerns an inverse time-dependent electromagnetic scattering problem of imaging internal defects in a homogeneous isotropic medium. The position and cross section of the defects are detected by transient electromagnetic pulses in the case of TE polarization. We apply the Kirchhoff migration scheme to locate the position of small objects from both synthetic and experimental data. The multiple-input-multiple-out scheme is used to recover extended scatterers from the data generated by the software GprMax. Numerical experiments show that the Kirchhoff migration method is not only efficient but also robust with respect to polluted data at high noise levels. Experimental results show good quantitative agreement with numerical simulations.

scholarly journals 3-D Multi-Component Reverse Time Migration Method for Tunnel Seismic Data

Sensors ◽  
2021 ◽  
Vol 21 (9) ◽  
pp. 3244
Author(s):  
Peng Guan ◽  
Cuifa Shao ◽  
Yuyong Jiao ◽  
Guohua Zhang ◽  
Bin Li ◽  
...  
Keyword(s):  
Seismic Data ◽  
Cross Correlation ◽  
Measured Data ◽  
Ray Theory ◽  
Reverse Time ◽  
Reverse Time Migration ◽  
Kirchhoff Migration ◽  
Time Migration ◽  
Migration Imaging ◽  
Migration Method

Migration imaging is a key step in tunnel seismic data processing. Due to the limitation of tunnel space, tunnel seismic data are small-quantity, multi-component, and have a small offset. Kirchhoff migration based on the ray theory is limited to the migration aperture and has low migration imaging accuracy. Kirchhoff migration can no longer meet the requirements of high-precision migration imaging. The reverse time migration (RTM) method is used to realize cross-correlation imaging by reverse-time recursion principle of the wave equation. The 3-D RTM method cannot only overcome the effect of small offset, but also realize multi-component data imaging, which is the most accurate migration method for tunnel seismic data. In this paper, we will study the 3-D RTM method for multi-component tunnel seismic data. Combined with the modeled data and the measured data, the imaging accuracy of the 3-D Kirchhoff migration and 3-D RTM is analyzed in detail. By comparing single-component and multi-component Kirchhoff migration and RTM profile, the advantages of the multi-component RTM method are summarized. Compared with the Kirchhoff migration method, the 3-D RTM method has the following advantages: (1) it can overcome the effect of small offset and expand the range of migration imaging; (2) multi-component data can be realized to improve the energy of anomalous interface; (3) it can make full use of multiple waves to realize migration imaging and improve the resolution of the anomalous interface. The modeled data and the measured data prove the advantages of the 3-D multi-component RTM method.

scholarly journals STRUCTURE MODELLING OF SUBSURFACE BY USING KIRCHHOFF MIGRATION METHOD AND FINITE DIFFERENCE ANISOTROPY METHOD

2017 ◽  
Vol 6 (02) ◽  
pp. 79
Author(s):  
Husni Cahyadi Kurniawan ◽  
Adi Susilo ◽  
Teguh Suroso
Keyword(s):  
High Resolution ◽  
Finite Difference ◽  
Seismic Data ◽  
Data Migration ◽  
Migration Process ◽  
Layer Model ◽  
Real Condition ◽  
Ratio Effect ◽  
Kirchhoff Migration ◽  
Migration Method

<p class="abstrak">The image of subsurface with a migration method keeps on developing to get an image result which the closest in real condition. The conditions in subsurface are very complex and variables it couses the process of wave  propagation which can not be judged as the same in every layers. so it is needed an anisotropy pharameter analysiz (η) in seismic data migration process. The research will compare two kinds of migrations those are Kirchhoff migration and finite difference anisotropy. It is done because not all datas are processed by anisotropy, even with isotropi it will get good result. The result of kirchoff migration has not so good quality (low resolution) on the first layer reflector.but on the second and third layer reflector have good result (high resolution). I estimate that in the first layer reflector there is anistropi influence, because the ratio effect between far offset and the depth is hight. The analysis result get η ansotropi pharameter result as 0,25 and put into migration process. On the second migration process is finite difference anisotropy appears on the first layer reflector and shows high resolution and suitable with the real layer model.</p>

scholarly journals 3-D Regularized focusing migration method for gravity data

2021 ◽  
Vol 660 (1) ◽  
pp. 012096
Author(s):  
Yidan Ding ◽  
Guoqing Ma ◽  
Qingfa Meng
Keyword(s):  
Gravity Data ◽  
Migration Method

The Efficiency of Natural and Electrokinetic Enhanced Migration of Pb in Aquifer

2012 ◽  
Vol 253-255 ◽  
pp. 1098-1101
Author(s):  
Hong Tao Hu
Keyword(s):  
Heavy Metal ◽  
Removal Efficiency ◽  
Experimental Results ◽  
Contaminated Groundwater ◽  
Voltage Gradient ◽  
Migration Method ◽  
Variation Rule

The natural and electrokinetic enhanced migration method was studied by the experiments in groundwater contaminated by heavy metal Pb in this work. The experimental results showed that the variation rule of Pb reflected that its migration was weak and the removal efficiency was only 9.30% near the anode in the natural seepage condition, but under the enhanced migration and remediation function, the pollutants could be enriched and removed faster, thus the removal efficiency of Pb was 46.72% near the anode at the end of experiment when the experimental voltage gradient was 0.28V/cm, which made known that this electrokinetic enhanced migration of Pb in contaminated groundwater was more effective method than that of natural seepage migration and enhanced the removal of contaminant in aquifer.

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