The "Horizon-T" Experiment: Extensive Air Showers Detection
  Horizon-T is an innovative detector system constructed to study Extensive Air Showers (EAS) in the energy range above 10^16 eV coming from a wide range of zenith angles (0 - 85 degrees). The system is located at Tien Shan high-altitude Science Station of Lebedev Physical Institute of the Russian Academy of Sciences at approximately 3340 meters above the sea level. It consists of eight charged particle detection points separated by the distance up to one kilometer as well as optical detector subsystem to view the Vavilov-Cerenkov light from the EAS. The time resolution of charged particles and Vavilov-Cerenkov light photons passage of the detector system is a few ns. This level of resolution allows conducting research of atmospheric development of individual EAS. 
R.U. Beisembaev, E.A. Beisembaeva, O.D. Dalkarov, V.A. Ryabov, A.V.   Stepanov, N.G. Vildanov, M.I. Vildanova, V.V. Zhukov, ...
physics.ins-det hep-ex