TIME-TRACK COMPLEMENTARITY IN THE STUDY OF EAS LONGITUDINAL DEVELOPMENT

Extensive air shower (EAS) muon production and propagation through the atmosphere were simulated. The incidence angles and arrival time at t he observation level were determined for each muon. It is shown that f or large distances from EAS cores and for GeV-muons, time and track me asurements could be used complementarily to improve the accuracy of th e muon production height determination. For TTC detectors of 5 GeV muo ns attached to EAS arrays at mountains and placed at a distance of abo ut 200-250 m from its centre, the accuracy of the muon production dept h estimate is about 35 g CM-2. The influence of the detector location, the muon energy threshold, the observation level and experimental err ors is analysed.