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TOMOFAST / Tomofast-x

Tomofast-x is a 3D parallel inversion platform to run single domain or joint inversion of gravity and magnetic data.
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Inversion artifacts #5

Closed alexeytsv closed 6 months ago

alexeytsv commented 6 months ago

Vitaliy, thank you very much for the TOMOFAST-X code. I found artifacts in the magnetic susceptibility model - local anomaly zones running from the surface to great depths. As a result of experiments I found out that it appears when X-Y coordinates of the model vertex match the X-Y coordinates of the magnetic field points (set as a regular grid). So it's possible that these are some errors in calculating sensitivity values... 2024-05-01_124217

vogarko commented 6 months ago

Hi Alexey, the data positions should not coincide with the model grid boundaries (due to the math calculations involved). Can you try shifting your model grid by 1 meter (in both X and Y directions) and check if this fixes the issue?

alexeytsv commented 6 months ago

Yes, thank you, that helped. As I understand it, you are using the algorithm from Sharma. I'll try to see if there might be newer and better implementations....