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L5 (global correlation norm) misfit is negative. How to normalize it? #36

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pplotn opened this issue Oct 19, 2021 · 0 comments
Open

L5 (global correlation norm) misfit is negative. How to normalize it? #36

pplotn opened this issue Oct 19, 2021 · 0 comments

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@pplotn
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pplotn commented Oct 19, 2021 •
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Hello, I am using the L5 or (global correlation) norm. As mentioned in the manual its implementation follows (Application of multi-source waveform inversion to marine streamer
data using the global correlation norm, Choi,Alkhalifah, 2012).

Originally it is negative.

I have a question: how to normalize it?

I attached the misfit file. And plots of the misfit functions on attached picture.

seis_fwi_log_L5.txt
marm_PICTURE
@pplotn pplotn changed the title L5 misfit is negative. GCN norm L5 (global correlation norm) misfit is negative. How to normalize it? Oct 20, 2021
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