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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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波场延拓最小二乘法去虚反射技术在上下缆采集数据处理中的应用
Keywords: 虚反射/鬼波,上下缆处理,噪声压制,最优去虚反射,频率—波数域
Abstract:
？海上拖缆采集数据通常存在缘自海水面虚反射(鬼波)的陷波特性,而近年推出的上下缆采集技术可有效压制虚反射,但常规上下缆处理技术往往忽略了测量过程中的噪声影响。本文基于已有研究成果,先利用频率—波数域波场延拓算子分别获得上下缆总波场与上行波和下行波的关系,继而获得上下缆总波场与上行波和虚反射算子的关系,然后采用最小二乘算法去除虚反射并将剩余噪声最小化,从而实现上下缆数据中最优提取上行波。合成数据和实际海上数据处理测试结果表明,上下缆数据处理结果既保留了浅层高频信息,有较高分辨率,又确保了深层低频信息,目的层反射比浅缆数据能量强、信噪比高。
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