ИСТИНА

The SPHERE-2 telescope constructed for the registration of EAS by the Cherenkov light reflected from the snowed surface used a method for the shower classification by the primary mass based on the steepness of the light lateral distribution function on the telescope’s mosaic. The simulation shows that the classification errors for a criterion by the characteristics of the direct Cherenkov light are lower. For this reason the next generation setup SPHERE-3 will be equipped with an extra detector of the direct light. As the two detectors will see different aspects of an event, the development of the criterion using the data of both can improve the classification quality.