The TUS Detector Trigger System Tests by Optical Simulator of EAS

Orbital ultra high energy cosmic ray detector TUS is prepared for launching in 2013 on-board Mikhail Lomonosov satellite. The preflight tests of detector and its systems are ongoing now. The trigger system was tested as well. A special tool (optical simulator of extensive air shower) with rapidly moving laser beam was produced for tests of the TUS photo-detector trigger electronics. These tests produced data that are useful for development of trigger simulation and event reconstruction programs. The optical simulator of extended air shower is presented. The TUS calibration in flight is shortly considered.