Method of digitization of magnetotelluric sounding data from a paper photocarrier

Abstract

The article describes a technique for preparing and processing data for recording variations of the geomagnetic field from a paper photocarrier into a digital form obtained using the MTL-71 magnetotelluric laboratory. The calculation of correction coefficients for bringing digitized data to the appropriate units of measurement is presented. The software used in processing the data of variations of the geomagnetic field is described. To assess the correctness of the above methodology, a comparison of digitized data from a paper photocarrier with data obtained by modern digital equipment is shown. Also, based on the calculation of apparent resistance given in the article, it is concluded that the proposed digitization method does not distort the obtained real record of geomagnetic field variations and, with appropriate calculations, allows you to build an apparent resistance curve characterizing the layered distribution of geoelectric section parameters.