Translations:Digital processing/1/en

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With the digital computer, a whole new step in seismic exploration was added: digital processing. Reflection seismology now involves three steps: acquisition, processing, and interpretation. Acquisition refers to the generation and recording of seismic data. Sources and receivers are laid out on the surface of the earth in various types of grid patterns. The objective is to probe the unknown geologic structure below the surface (Figure 3). A source can be made up of an array of vibrators (called vibroseis) or of dynamite shots or of air guns. A receiver is an array of geophones on land or an array of hydrophones at sea. The sources are activated one at a time rather than all together.