The Dependence of the Age Parameter from EAS Size and Zenith Angle of   Incidence
  The quality of the MAKET-ANI detector installation in view of the uniformity of the registration efficiency is demonstrated. Based on a data sample collected by the MAKET-ANI array in the period of June 1997 - March 1999, the dependencies of the age parameter on the zenith angle and the EAS size (10^5-10^7) are studied. The variation of the age parameter with the shower size can be approximately related to the elongation rate. 
A.A. Chilingarian, G.V. Gharagyozyan, S.S. Ghazaryan, G.G. Hovsepyan,   E.A. Mamidjanyan, L.G. Melkumyan, S.H. Sokhoyan