Head of department
Akchurin Adel Dzhavidovich
Tel.: +7 (843) 233-71-96
Radioastronomy department was founded in 1962.
The department trains specialists in 4 spheres of radiophysics:
DEPARTMENT OF RADIOASTRONOMY
The main direction of our department is the propagation of radio waves in the ionosphere/atmosphere, and radio astronomy. In recent times, mainly the first subject is dominated. The area of most attention is the ionosphere as a representative of the near space. As the boundary zone between the atmosphere and the near space, the ionosphere feels the impact from below (from the lower atmosphere) and above (the ionizing radiation of the sun, as well as particles and fields of magnetosphere and plasmasphere). This allows us to study not only endoionospheric processes, but also to use the ionosphere as a sensor that is sensitive to the effects from both the Earth and from the space.
The ionosphere as an object of observation is naturally an interesting and multi-faceted subject and none of laboratory is able to cover it's study on all sides. The inevitable specialization of each research group leads to focusing on their specific topics. The main such topics in the world are planetary and regional (equatorial, auroral and midlatitude) study. Due to its location, our research associated with mid-latitude ionosphere. Of course, the midlatitude ionosphere is not so clearly responds to the cosmic, magnetospheric influence how the auroral ionosphere, but there is enough mysteries and unexplored phenomena. So in a quiet midlatitude ionosphere constantly present the so-called traveling ionospheric disturbances (TIDs) with typical horizontal dimensions of 50-500 km which are considered as medium-scale (MS). The existence of such MSTIDs until now still has no generally accepted explanation, whereby they is the object of attention increased in recent years due to the expanded possibilities of radar technology and the growth of the number of satellite signal receivers. Special scientific measurement companies are organized to study MSTIDs, for example, it is SpICE (Spatial Ionospheric Correlation Experiment).
Our main measuring instrument is a unique ionosonde "Cyclon" with high measurement cadence, resolution, contents, and flexibility needed for research. It is located in site out of Kazan. And despite the fact that due to the nature of his work the ionosonde itself is able to detect rare events and extract new effects in the ionosphere (a simple highlighting of weak MSTIDs on the base of amplitude variations, a typical signature of a response to the long and strong earthquakes, pairwise beats of o- and x-, and o-z-o- and x-mode in the traces of Es layer, recording of artificial ionospheric irregularities appearing at powerful heating) not previously revealed. But its maximum benefit in the discovery of new effects is only possible with cooperation with other devices, such as a dense network of GPS-receivers, airglow all sky imager, etc.
The team has a set of equipment consisting of the own network very closely spaced (from 100 m to 40 km) GPS-GLONASS and weather stations, which allows a detailed study of the spatial structure of tropospheric processes and do theoretical developments in the field of satellite monitoring of the atmosphere research. Accumulated series of continuous every seconds observations since 2008 allow us to develop empirical models of mesoscale processes. Currently, the network is used to estimate parameters of the atmosphere (the integral moisture content) and are a promising tool for atmospheric studying. Such studies are relevant because they allow us not only to create a picture of humidity fields for meteorological forecasts, but also to develop methods to improve the accuracy of satellite positioning systems and find a causal link between the lower atmosphere and ionosphere.
Currently, the department has 2 processors, 2 associate professors (5 candidates).
Openlab (project) "Ionosphere monitoring" works in the department.
Project "Ionosphere monitoring"
To focus the efforts in this direction in our department established scientific group within the project "Ionosphere monitoring", working as part of laboratory "Near space research." The project team is well balanced both by age and by topic. The older generation is represented by head of department Akchurin A.D. and prof. Teptin G.M.
The work of the project been established cooperation with Russian and foreign leading scientists. So first, the project entered the highly experienced specialist in the field of ionosphere with powerful radio waves Frolov V.L. modification (Nizhny Novgorod, NIRFI; h-index: 13). For this reason, our employees were participants in experiments with heating facility Sura (NIRFI, N. Novgorod) to study the properties of artificial ionospheric irregularities (AII) with transverse dimensions of 50-200 m, which until recently have been poorly understood. According to the research already published several papers and preparing the future ones. The ability to observe such AIIs is determined by our ionosonde good location in relation to the heating facility. In the past year, researches on the properties of artificial wave disturbances excited by the heating facility SURA are actively underway using the opportunity to be included in the measurement of GPS/GLONASS receivers in the Middle Volga region and Tatarstan network. Of the young participants of the laboratory involved in this work graduate student Sherstyukov R.O. and here the first results. The importance and prospects of such research have repeatedly noted in the Russian and international conferences. The development of this area of research will undoubtedly continue.
Then our group joined leading Japanese expert in the study of the ionosphere using ionosondes Maruyama T. (h-index: 19) [Tokyo, Japan, National Institute of Information and Communications Technology]. Drawing on his extensive experience, he has helped highlight responses from remote and powerful earthquakes at ionograms and complete interpretation of these signatures, suggesting ionosonde for registering fast-moving acoustic waves in the ionosphere, the analogy with the work of radio acoustic sounding system. Of the young participants of the laboratory involved in this work researcher Yusupov K.M. and has prepared two articles. T. Maruyama previously conducted an interesting study of little-known transient Es layer over Japan and plans to conduct a comparative analysis with the transient Es-layers in our region.
Plans to recruit leading Chinese specialists on the airglow registration J. Xu and W. Yuan (h-index: 16 and 8). [China, Beijing, Center for Space Science and Applied Research Chinese Academy of Sciences, State Key Laboratory of Space Weather]. One of directions of their activity is to record the night's red oxygen emission at 630.0 nm and the hydroxyl emission in the near infrared region of the spectrum. These works are promising, as they allow the vertical structure of the electron density of the ionosounde to combine with extensive spatial structure of the all-sky imager.
Ionospheric monitoring now impossible without satellite technology. This trend begun together the previous head of the department Teptin G.M. and prof. Hutorova O.G. actively continues the younger generation - Kalinnikov V.V., Hutorov V.E. The team has a set of equipment consisting of the own network very closely spaced (from 100 m to 40 km) GPS-GLONASS and weather stations, which allows a detailed study of the spatial structure of tropospheric processes and do theoretical developments in the field of satellite monitoring of the atmosphere research. Accumulated series of continuous every seconds observations since 2008 allow us to develop empirical models of mesoscale processes. Currently, the network is used to estimate parameters of the atmosphere (the integral moisture content) and are a promising tool for atmospheric studying. Such studies are relevant because they allow us not only to create a picture of humidity fields for meteorological forecasts, but also to develop methods to improve the accuracy of satellite positioning systems and find a causal link between the lower atmosphere and ionosphere.