.基于归一化互相关成像条件的GPR逆时偏移成像
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Release time:2020-08-07 DOI number:10.11817/j.issn.1672-7207.2018.05.025 Affiliation of Author(s):中南大学地球科学与信息物理学院 Teaching and Research Group:中南大学应用地球物理系 Journal:中南大学学报(自然科学版) Place of Publication:中国 Key Words:探地雷达；逆时偏移；归一化互相关成像条件；零时刻成像条件 Abstract:针对基于零时刻成像条件的探地雷达(GPR)逆时偏移精度低,难以对复杂结构进行高精度成像的缺点,将归一化互相关成像条件应用于GPR叠前逆时偏移成像.从二维GPR电磁波方程出发,采用基于完全匹配层(PML)边界条件的时域有限单元法(FETD)模拟电磁波正向和逆向传播,采用归一化互相关成像条件获取叠前逆时偏移的偏移结果,将空间高通滤波用于压制互相关过程中产生的低频噪声,然后编制相应的 GPR 叠前逆时偏移程序.在此基础上,建立2个复杂的GPR模型,利用基于归一化互相关成像条件的GPR逆时偏移程序进行计算,并与基于零时刻成像条件的GPR逆时偏移剖面进行对比.研究结果表明:与基于零时刻成像条件的GPR逆时偏移剖面相比,基于归一化互相关成像条件的GPR叠前逆时偏移剖面能更清晰地反映异常体空间形态和内部结构信息,其分辨率和成像精度更高. Co-author:戴前伟, 冯德山, 王洪华, 张彬 First Author:陈德鹏 Indexed by:Applied Research Document Code:DOI：10.11817/j.issn.1672-7207.2018.05.025 Discipline:地质资源与地质工程 Document Type:J Volume:49 Issue:5 Page Number:1221-1227 Translation or Not:no Date of Publication:2018-05-01 Included Journals:EI -
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