APPLICATION OF MATLAB IN CALCULATING THE ALL-TIME APPARENT RESISTIVITY OF CSAMT DATA
Under the scalar measurement mode of CSAMT,there is a"near-field effect"in the data collected in the field,which generates distortion in the data.In order to quickly and effectively correct the data in the"transition zone"and"near zone"to eliminate the"near-field effect"and increase the exploration depth,MATLAB is used as the programming and calculation tool,the measured Cagniard apparent resistivity and the corresponding small amount of measurement parameters are directly utilized,and starting from the Cagniard apparent resistivity formula,an orthogonal iterative method is adopted to obtain the apparent resistivity of the whole area,and the calculation program code is given.The results show that the forward iterative calculation method is effective in obtaining the all-time apparent resistivity and realizing the"near-field effect"correction,and has high accuracy and speed,and the program code can be used directly as a tool for processing the CSAMT measured data.
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