空中磁気探査におけるデーター処理と電子計算機の役割

抄録

The paper presents the general view of the data processing system of the aeromagnetic survey now adopted in Geological Survey of Japan. The important problem in the qualitative and quantitative interpretation is the problem concerning with the accuracy of the compiled and the processed aeromagnetic map.
In the off-shore prospecting, the accuracy of the compiled map is largely affected with the positionlocation system used.
Applying the Decca, Loran C or Doppler navigation system to determine the flight path and its intersection, some inaccuracy would be produced. The adoption of the least square techinique to adjust the flight path without misclosur is necessary.
The accuracy of the processed map depends upon the frequency characteristics of the applied digital sampling filter and the method of the interpolation from grid value. After discussing these problems, the examples of the frequency characteristics of the upward continuation filter and the continuation map are shown.
In the last section, the method of the machine contouring by the computer are presented. The interpolation from the grid value are based on the Lagrange formula.