Contribution of Multiple Scattering of Cherenkov Photons to Shower Optical Image

Cherenkov photons constitute a background for fluorescence signal from the shower. So far only direct and singly-scattered Cherenkov photons have been taken into account in analyses of the shower optical image. In this poster, a Monte Carlo method of evaluating a contribution of multiply-scattered Cherenkov light to the optical image of the shower is presented.. 1