Handling
Basically the inversion involves three steps (available by buttons):
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Create New Project (New Project Button): After reading a data file, a project
directory is created where all information is stored. The .pro File contains the key
information and can be loaded later via Load Project.
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Preparing the inversion (Prepare Button):
Creation of the meshes, calculation of primary potentials
and the initial sensitivity distribution.
This step is numerically intense, but only
called once and thus saves computing time. In case of a circle geometry these can be
calculated analytically and the step may be omitted.
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Running the inversion (Run Button) does exactly what it means. The inversion is
carried out in an external program using the given options. Due to the Prepare button
the run-time is quite low so that different options can be tested quickly.
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Inversion Options
The most important option is the regularization strength.
It determines the smoothness of the resistivity distribution and can be adjusted
with a slider.
Big values (100-1000) correspond to smooth solution, whereas small values (1-10)
tend to show more structures. The Preview Button helps to try out the
models of different complexity. Finally, the data should be fitted well (chi^2=1-10)
without unnessecary structures. An automatic checkbox turns on autodetection.
However this is not guaranteed to work.
Bad data may not be fitted well due to outliers. The robust inversion
helps to find a better model through reweigting badly fitted data.
Often, a smoothed image of the reality is reproduced due to the errors.
The Blocky model switch enforces sharp boundaries in the model.
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