ИСТИНА

«Vernov» satellite with RELEC instruments was launched into solar-synchronous orbit (altitude 620 - 820 km, inclination 98.4°, orbital period about 100 min) on July 8, 2014 and began to obtain scientific information since July 20, 2014. The goals of RELEC mission were the study of TGFs (Terrestrial Gamma-ray Flashes) and relativistic electron of Earth’s radiation belt precipitation with it possible connection with atmosphere transient luminous events, as well as the solar gamma-emission and GRB (gamma-ray bursts). Also RELEC permits monitoring of radiation and electromagnetic environment in the near-Earth Space, important problem of space weather study. The RELEC set of instruments includes two identical detectors of X- and gamma-rays of high temporal resolution and sensitivity (DRGE-1 & DRGE-2), three axe directed detectors of energetic electrons and protons DRGE-3, UV detector DUV, low-frequency analyser LFA, radio-frequency analyser RFA and module of electronics. During the RELEC mission following experiments will be provided: - fine time structure (~1 mcs) measurements of transient atmospheric events in UV, X- and gamma-rays; - simultaneous observations of energetic electron flux (energy range ~0.1-10.0 MeV and low-frequency (~0.1-10 kHz) electromagnetic wave field intensity variations with high temporal resolution (~1 ms); - measurements of electron flux pitch-angle distribution in dynamical range from ~0.1 up to 105 part/cm2s; - monitoring of charge and neutral background particles in different areas of near-Earth space. As an example of RELEC results the measurements of gamma-emission of the C7 class solar flare 24 September 2014 (start 17:45, maximum 17:50, finish 17:52) and outer radiation belt variation during moderate geomagnetic disturbances 4-10 December 2014 are presented.