  This work summarizes the results presented at 29th International Cosmic Ray
Conference in Pune India. Generally the aim of this work is to obtain the
lateral distribution of the atmospheric Cherenkov light in extensive air
showers produced by different primary particles in wide energy range and at
several observation levels and to fit the obtained lateral distributions. Using
one large detector and partially modified CORSIKA code version are obtained the
lateral distributions of Cherenkov light flux densities at several observation
levels for different particle primaries precisely at 536 g/cm2 Chacaltaya, 700
g/cm2 Moussala and 875 g/cm2 Kartalska field observation levels for hadronic
primaries and gamma quanta in the energy range 1011 eV-1016 eV. On the basis of
the solution of over-determined inverse problem the approximation of these
distributions is obtained. The same model function for all the primaries is
used and for the different observation levels. The different model parameters
for the different primaries and levels are obtained. The approximations are
compared with polynomial approximation obtained with different method. Both
approximations are used for detector efficiency estimation for the different
experiments in preparation and estimation of the accuracy of the reconstruction
techniques. At the same time inclined showers up to 30 degrees zenith angle are
studied at Chacaltaya observation level. The obtained lateral distributions of
vertical showers are compared with vertical showers model and the previously
obtained approximation. This permits to adjust the reconstruction strategy and
to study the model parameters behavior.
