Velocity estimation by inversion
of Focusing operators:
About resolution dependent parameterization and the use of the LSQR method

Outline

Outline

Inversion of Focusing Operators

Inversion of Focusing Operators

Inversion of Focusing Operators

Inversion of Focusing Operators

Inversion of Focusing Operators

Outline

Regularization

Regularization: parameterization

Regularization:
optimization

Regularization

Outline

Resolution dependent Parameterization

Resolution dependent Parameterization

Resolution dependent Parameterization

Resolution dependent Parameterization

Resolution dependent Parameterization

Outline

Optimization by LSQR

Optimization by LSQR

Optimization by LSQR

Optimization by LSQR

Calculation of resolution by LSQR

Calculation of resolution by LSQR

Calculation of resolution by LSQR

Calculation of resolution by LSQR

Calculation of resolution by LSQR

Optimization by LSQR

Outline

Synthetic Example

Resolution dependent parameterization

Result

Migration

Conclusions

Acknowledgements