ИСТИНА

Vernov satellite with RELEC experiment on-board was launched on 2014 July, 8 into a polar solar-synchronous orbit. The main goal of the Vernov mission is the study of magnetospheric relativistic electron precipitation and its possible influence on the upper atmosphere as well as the observation of Transient Luminous Events (TLE) and Terrestrial Gamma Flashes (TGF) across a broad range of the electromagnetic spectrum. The RELEC (Relativistic Electrons) instrument complex on-board the Vernov spacecraft includes two identical X- and gamma-ray detectors of high temporal resolution and sensitivity (DRGE-1 & DRGE-2), three axis position detectors for high-energy electrons and protons (DRGE-3), UV TLE imager (MTEL), UV detector (DUV), low frequency analyser (LFA), radio frequency analyser (RFA), and electronics module responsible for control and data collection (BE). Study of fine time structure (~1 μs) of transient atmospheric events in UV, X- and gamma rays with an optical imaging is among the Vernov mission tusks. The main instrument for TGF observation is DRGE gamma-ray spectrometer providing measurements in 10-3000 keV energy range with four detectors directed to atmosphere. Total area of DRGE detectors is ~500 cm2. The data were recorded both in monitoring and gamma by gamma modes with timing accuracy ~15 mcs. Several TGF candidates with 10-40 gammas in a burst with duration <1ms were detected. Possible connection of these flashes with TLEs detected by DUV instrument and lightning observed by WWLN and radio wave meters LFA(~0.1–10 kHz) and RFA (0.05-15 MHz) is discussed.