Resolution limit of traveltime tomography

被引：30

作者：

Dahlen, FA ^{[1
]}

机构：

[1] Princeton Univ, Dept Geosci, Princeton, NJ 08544 USA

来源：

GEOPHYSICAL JOURNAL INTERNATIONAL | 2004年 / 157卷 / 01期

关键词：

integral transforms; inverse theory; tomography; traveltime;

D O I：

10.1111/j.1365-246X.2004.02214.x

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

We derive an explicit formula relating a recovered 3-D seismic slowness image to the actual seismic slowness under the assumption that a tomographically complete collection of finite-frequency traveltime shifts is inverted using linearized ray theory. The tomographically recovered image is blunted, or diminished in amplitude, and blurred, or spread laterally, as a result of wave front healing and other finite-frequency diffraction effects. The 1-D spreading varies as the cube root of the amplitude reduction, so that total volume-integrated slowness is conserved.

引用

页码：315 / 331

页数：17

共 13 条

[1] The two-dimensional resolution kernel associated with retrieval of ionospheric and atmospheric refractivity profiles by Abelian inversion of radio occultation phase data [J].