International cooperation

The department cooperates with many foreign scientific groups and organizations engaged in geospace research, including:

• University Massachusetts Lowell Center for Atmospheric Research - UMLCAR, Director - Prof. Bodo Reinisch. Development of methods of ionospheric sounding using the DPS-4 portable digital ionosonde (UMLCAR) and algorithms for coherent spatio-temporal signal processing of broadcast HF radio stations (IRA NASU). As a result of cooperation, a method of frequency-angle sounding of the ionosphere was developed to restore the characteristics of traveling ionospheric disturbances and their visualization in real time.
  As part of a partnership project UNTC P-330 (leader - V. G. Galushko) together with UMLCAR the effect of self-scattering of a powerful radio wave on plasma ionospheric inhomogeneities stimulated by it was studied. (V. G. Galushko, A. V. Koloskov, V. V. Paznukhov, B. W. Reinisch, G. Sales, Y. M. Yampolski, and A. V. Zalizovsky. Self-Scattering of the HAARP-Heater Emission as Observed at Geographically Dispersed Receiving Sites. Antennas and Propagation Magazine, December, 2008, submitted). The UMLCAR ionosonde network in the USA and Greenland and two coherent complexes of IRA NASU in Ukraine (RAO) and at observatory KHO, isl. Svalbard, Norway, were used as receiving positions.
• Geophysical Institute of USA, Fairbanks University, Alaska - GI UFA, Director - Prof. Rodger Smith, collaborator - Prof. Brent Watkins. Study of the effects of scintillation and absorption of radiation from discrete cosmic sources (DCS) and the cosmic background in the naturally and artificially disturbed polar ionosphere (responsible executor - V. G. Bezrodny). As instruments, multi-beam phase oriented gratings of panoramic riometers at GI UFA observatories in Poker Flat and Hakona (Alaska) were used. Restoration of the spatial spectrum of plasma inhomogeneities and their movement velocities. The effect of lateral scattering of DCS radiation on magneto-oriented ionospheric inhomogeneities stimulated by the powerful HAARP heating stand was predicted and revealed. The technique for visualization of the spatio-temporal distribution of ionospheric inhomogeneities over Alaska is proposed. (V. G. Bezrodny, O. V. Charkina, V. G. Galushko, K. Groves, A. S. Kashcheyev, B. J. Watkins, Y. M. Yampolski, and Y. Murayama (2008), Application of an imaging HF riometer for the observation of scintillations of discrete cosmic sources, Radio Sci., 43, RS6007, doi:101029/2007RS003721 >>.)
• Space Research Institute, Austrian Academy of Sciences, Graz, Austria, Director is Prof. W. Baumjohann , collaborator - Prof. Helmut O. Rucker (Institut fur Weltraumforschung, IWF, der Osterreichischen Akademie der Wissenschaften, OAW). Responsible executor -   G.V. Litvinenko. With the help of new high-efficiency recording equipment developed at RI NAS, the data of observations of sporadic decameter radiation from Jupiter, obtained on the world's largest decameter radio telescope UTR-2, are processed. Theoretical studies of the dynamic spectra of Jupiter's radio radiation are being conducted, and physical mechanisms of the formation of S-radiation pulses are being developed. For the first time, "simple" S-bursts were shown to have a complex internal microsecond structure. In the future, it is planned to create a physically based consistent hierarchical system of modulation effects of sporadic decameter radiation of Jupiter, taking into account the influence of polarization effects and radiation propagation effects in plasma environments.
• European Incoherent Scatter Scientific Association (EISCAT), Kiruna, Sweden and Tromso University, Norway, Scientific Director of EISCAT - Prof. A. Brekke. Responsible executor -   O.V. Koloskov. Investigation of the effects of the propagation of short radio waves in the high-latitude ionosphere, study of global resonances in the Arctic and Antarctica. The KNO Observatory on the island of Svalbard (78° 8' 52.8" N, 16° 2' 34.8" E) was equipped with coherent ionospheric sounding units and magnetometric stations of Ukrainian design for the study of Shumanovsky (SR) and Ionospheric Alfven resonators (IAR). In 2008, an Internet-controlled coherent two-channel HF receiver was installed at the KHO observatory, which allows real-time analysis of the effects of the scattering of test radio signals on inhomogeneities of the polar ionosphere. Together with Norwegian colleagues, the effect of the solar eclipse on July 31, 2008 on medium- and long-distance radio routes was investigated. A number of test experiments on coherent reception of radiation from powerful heating stands of HAARP, SPEAR and Tromso were carried out.