ИСТИНА

TUS (Tracking Ultraviolet Set-up) is the first orbital detector of extreme energy cosmic rays (EECRs), which works as a part of the scientific payload of the Lomonosov satellite. The main aim of the mission is to test the technique of registering fluorescent and Cherenkov radiation of the secondaries born by EECRs in the atmosphere with a space telescope, and to collect information necessary for constructing the next generation instruments such as KLYPVE (K-EUSO) and JEM-EUSO. We briefly review the technical parameters of TUS and present preliminary results of its operation on orbit since May 2016.