Lyapunov Exponents for 2-D Ray Tracing Without Interfaces
Lyapunov Exponents for 2-D Ray Tracing Without Interfaces
复制标题
无接口二维射线追踪的李雅普诺夫指数
DOI:
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发表时间:
2002
期刊:
影响因子:
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通讯作者:
L. Klimeš
中科院分区:
文献类型:
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作者:
L. Klimeš
Summary— The Lyapunov exponents quantify the exponential divergence of rays asymptotically, along infinitely long rays. The Lyapunov exponent for a finite 2-D ray and the average Lyapunov exponents for a set of finite 2-D rays and for a 2-D velocity model are introduced. The equations for the estimation of the average Lyapunov exponents in a given smooth 2-D velocity model without interfaces are proposed and illustrated by a numerical example. The equations allow the average exponential divergence of rays and exponential growth of the number of travel-time branches in the velocity model to be estimated prior to ray tracing.