Search academic texts

Information × Registration Number 0217U000251, 0116U002871 , R & D reports Title Coordinated simultaneous studies of solar system objects by ground- and space-based methods of low-frequency radio astronomy. Stage 2: Realization of the coordinated synchronous international researches by means of the upgraded low-frequency Ukrainian radio telescopes UTR-2, URAN, GURT as well as by space missions Cassini, Juno, SOHO, STEREO, WIND. popup.stage_title Head Zakharenko Vyacheslav Vladimirovich, Registration Date 25-01-2017 Organization Institute of Radio Astronomy of Sciences of Ukraine popup.description2 In 2016 the first simultaneous observations of the radio emission of Jupiter by the ground-based telescopes UTR-2, URAN, GURT (Ukraine), NDA, NenuFAR (France), LWA1 (USA) and the spacecraft Juno at the time of closest approach (<5,000 km) have been carried. In this year three major and several preparatory sessions of observations (only ground-based radio telescopes) were held. Thanks to the collaboration with the Paris Observatory (France) and the Future University in Hakodate (Japan) the server has been created, which will form the data archive of observations for UTR-2, URAN, GURT that are included in the power European base VESPA (Virtual European Solar and Planetary Access). In addition,the multiantenna ground-based observations allowed us to discover new features in short bursts of radio emission from Jupiter, the characteristic duration of which is a few milliseconds. By measuring on the September 6, 2014 with the help of the improved two-dimensional heliograph radio telescope UTR-2 the first-of-its-kind radio imaging of a decameter solar stationary type IV radio burst has been performed. As a result of these observations, it was found that the source of the burst was located in the high coronal loops. The data were obtained by both space observatories (GOES, SDO, SOHO, STEREO) and different ground-based instruments (ORFEES, NDA, RSTO, NRH) . The results confirm one of the possible scenarios, leading to stationary type IV bursts, based on the fact that the radio emission of the stationary type IV burst is initiated by a solar flare (in this case it had the class C8.0) and then maintained by the injection of energetic electrons into the radiating structureof IV type ( presumably in the structure of the loop) due to coronal mass ejections following after the flare. By processing records of the giant storm on Saturn the catalog of (several thousand events) about the episodes from 21 to 25 December of 2010 was created. Consequently, a number of characteristics of the SED (Lightning duration spectrum storm activity, etc.) has been obtained. A perturbation of atmospheric infrasound and the electric field directly after the solar flare (and / or a coronal mass ejection) has been detected. The experiments showed that the main energy of the infrasound atmospheric disturbances are concentrated in the range of 0.01-0.3 Hz. Product Description popup.authors Вольвач Ярослав Сергійович Калініченко Микола Миколайович Коноваленко Олександр Олександрович Станіславський Олександр Олександрович Ульянов Олег Михайлович popup.nrat_date 2020-04-02 Close