Source Wavelet Inversion

By Chaiwoot Boonyasiriwat

Figure 1. a) True and inverted wavelets. b) Observed and synthetic data. c) Waveform residual over iteration.

Objective: Learn how to extract a source wavelet using source inversion.

Theory: 1D source inversion

Procedure:

1. Download the Matlab codes: src1d.m, modeling.m, and ricker.m.
2. Run program src1d.m in Matlab to obtain the inverted wavelet.

Questions:

1. What are the advantages and disadvantages of this method?
2. Would it still work when velocity is inaccurate? How can we fix the problem?

Exercise:

1. Use wrong velocity profile in the inversion and see the result. Improve the inversion result using a window.
2. Compare the source inversion with the source extraction using SSP transform.