Dipped layers
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- Finished content from previous lecture

Limitations
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- Hidden layers
- Thin Layers

Refraction tomography
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- Diving waves
- Principle of forward modelling and inversion
- Application example MSc M. Erb

Lecture notes :download:`Lecture slides <../Seismics/PPTSlide/Lecture5_AddonsHiddenLayersAndTomography.pdf>`