The main goal of the Vernov mission is the study of magnetospheric relativistic electron precipit... more 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 onboard the Vernov spacecraft includes two identical X- and gamma-ray detectors of high temporal resolution and sensitivity (DRGE-1 and DRGE-2), three axis position detectors for high-energy electrons and protons (DRGE-3), a UV TLE imager (MTEL), a UV detector (DUV), a low frequency analyser (LFA), a radio frequency analyser (RFA), and AN electronics module responsible for control and data collection (BE). The RELEC mission conducts the following experiments: – simultaneous observations of high-energy electron and proton fluxes (within the energy range of ∼0.1–10.0 MeV) and low-frequency (∼0.1–10 kHz) electromagnetic wave field i...
The ultraviolet and infrared optical sensors previously used at RELEC space missions were install... more The ultraviolet and infrared optical sensors previously used at RELEC space missions were installed at the highaltitude research station Aragats at 3200 m above the sea level. The spectral composition and temporal structure of the recorded optical signals and measurements of the electrostatic field and atmospheric discharges obtained by “fast” and “slow” field sensors have been compared. Measurements of lightning and related to them phenomena observed at the mountain altitude and on board of orbiting satellites are compared.
The new space project of M. V. Lomonosov Moscow State University on elaboration of multiple satel... more The new space project of M. V. Lomonosov Moscow State University on elaboration of multiple satellites for real time monitoring in the near-Earth space of radiation environment, natural (asteroids, meteoroids) and artificial (space debris) potentially dangerous objects, electromagnetic transients, such as cosmic gamma ray bursts, terrestrial gamma ray flashes, optical and ultraviolet bursts in the Earth atmosphere is presented. It is intended to install on the satellites the following instruments for space monitoring of dangerous objects and hazards: spectrometers of electrons and protons, complex of instruments for study of transient electromagnetic phenomena including gamma ray spectrometer, detectors of ultraviolet and optical emission and wide-field optical cameras. Successful implementation of the project for the first time in the world allows realization of a space system prototype for monitoring and preventing of space hazards for both ongoing and planned space missions, and ...
Simultaneous observation of lightning emission in different wave ranges of electromagnetic spectrum in Tien Shan mountains
Atmospheric Research
Abstract Simultaneous registration of electromagnetic emission generated by atmospheric lightning... more Abstract Simultaneous registration of electromagnetic emission generated by atmospheric lightning discharges in the radio-frequency (f = 0.1–30 MHz), infrared (λ = 610–800 nm), ultraviolet (λ = 240–380 nm), and in the soft energy gamma-radiation (Eγ = 0.1–4 MeV) ranges of electromagnetic spectrum was made synchronously in mountain conditions with complex detector system of the Tien Shan High-Mountain Cosmic Ray Station. We discuss preliminary results of these measurements and perspectives of future application of the multispectral investigation technique to study of the effects of thunderstorm activity.
Vernov Satellite Data of Transient Atmospheric Events
Journal of Applied Meteorology and Climatology
Data on transient atmospheric events (TAEs) were obtained from the Vernov satellite and are prese... more Data on transient atmospheric events (TAEs) were obtained from the Vernov satellite and are presented in this paper. The data are considered in conjunction with previous data obtained by the Universitetsky-Tatiana-1 and Universitetsky-Tatiana-2 satellites. The larger volume of stored scientific data in the Vernov mission and its advanced ultraviolet (UV) and red–infrared (R–IR) radiation detector (DUV) measurements allowed improved TAE-distribution data to be obtained over a wide range of photon numbers. The difference between features of luminous transients and “dim” transients, measured by the Universitetsky-Tatiana-2 satellite, is confirmed by Vernov’s data. There are also interesting dim UV events with no R–IR radiation. Such events are expected to be deep in the atmosphere at the level of thunderstorm clouds. They might be radiated by electric discharges of less power than lightning; in fact, at the preliminary stage of lightning. The observation of repeating dim TAEs in variou...
We present motivations for and study feasibility of a small, rapid-optical/IR response gamma-ray ... more We present motivations for and study feasibility of a small, rapid-optical/IR response gamma-ray burst (GRB) space observatory. By analyzing existing GRB data, we give realistic detection rates for X-ray and optical/IR instruments of modest size under actual flight conditions. Given new capabilities of fast optical/IR response (~ 1 s to target) and simultaneous multi-band imaging, such an observatory can have a reasonable event rate, likely leading to new science. Requiring a Swift-like orbit, duty cycle, and observing constraints, a Swift-BAT scaled down to 190 cm 2 of detector area would still detect and locate about 27 GRB yr -1 for a trigger threshold of 6.5 σ. About 23% of X-ray located GRB would be detected optically for a 10 cm diameter instrument (~ 6 yr -1 for the 6.5 σ X-ray trigger).
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Papers by K. Saleev