A New Method to Reconstruct the Energy and Determine the Composition of   Cosmic Rays from the Measurement of Cherenkov Light and Particle Densities in   Extended Air Showers
  A Monte-Carlo study is presented using ground based measurements of the electromagnetic part of showers initiated in the atmosphere by high energetic cosmic rays to reconstruct energy and mass of primary particles with energies above 300 TeV. With two detector arrays measuring Cherenkov light and particle densities as realized in the HEGRA experiment shower properties are reconstructed and interpreted to determine energy and energy per nucleon of the primary particle. 
A. Lindner (Univ. Hamburg, Germany)