Purpose function of the acrial gamma spectrometry method (AGSM) in geological investigation system

The objective function of airborne gamma spectrometric method is defined as a search for geochemically anomalous radioactive objects on the basis of investigating space variations in the intensities of the thorium, uranium and potassium components of radioactive radiation which arise in the near-Earth atmosphere as a result of variations in the contents of radioelements in the upper (30 to 50 cm) layer of the Earth's surface, variable geometrical conditions of measurements and the variable radioactivity of the atmospheric air. Three indications of anomalism are pointed out, viz. correlated changes in the intensity of at least two components with respect to the background totality of their mutually independent values, a low probability of a given combination of the intensities of field components belonging to the background sample and the dominancy, i.e. the rapidity of increase, in the anomaly, of one field component over another. Rational ways of separating the ''anomaly-background'' system, effectiveness criteria of separation and some questions of the metrology of measurements have been considered