STRUCTURE OF VARIABILITY INDEXES OF COSMIC WEATHER AS APPLIED TO DATA MONITORING OF FLUXES OF RADIO SOURCES AT THE “URAN-4” RADIO TELESCOPE

DOI: https://doi.org/10.15407/rpra22.04.294

L. I. Sobitniak, M. I. Ryabov, A. L. Sukharev, S. K. Panishko

Abstract


PACS numbers: 95.55.Jz,
95.85.Bh, 96.50.Wx 

Purpose: Investigation of the effects of the influence of solar and geomagnetic activity on the state of the Earth’s upper atmosphere by the method of “transmission through” it with the radiation of cosmic radio sources.

Design/Methodology/approach: Monitoring of the fluxes of powerful galactic and extragalactic radio sources is carried out at the URAN-4 radio telescope of the Odesa Observatory of the Institute of Radio Astronomy of NAS of Ukraine from 1987 till now (22–24 cycles of solar activity).

Findings: As a result of observations, there are significant variations in the fluxes of long-term and short-term radio sources. These changes are caused by the phenomena and processes associated with manifestation of the solar and geomagnetic activity. Thus, by examining the data obtained as a result of monitoring the radio fluxes, the degree and nature of the integral influence of space weather on the upper atmosphere of the Earth during the solar cycle and in certain episodes of extreme manifestations can be determined. Among the studied factors of cosmic weather which exert influence on the Earth upper atmosphere, the index of the radio emission of the Sun at the wavelength of 10 cm – F10.7 (as an indicator of ultraviolet radiation from the Sun) and the index of planetary geomagnetic activity – Ap-index was considered as an indicator of the effects of corpuscular fluxes.

Conclusions: Monitoring of the fluxes of space radio sources made at the “URAN-4” radio telescope makes it possible to “transmit through” the entire upper atmosphere of the Earth and determines the integral effect of the solar and geomagnetic activity influence on it. Such results can not be achieved with the terrestrial radiophysics and radar methods. By means of wavelet analysis, the information on the existence of the main periods characterizing the space weather and the time of their existence was obtained. This makes it possible to relate the observed effects in changes of the fluxes of radio sources with the main sources of influence on the state of the Earth’s upper atmosphere.

Key words: upper atmosphere, solar activity, geomagnetic activity, space weather

Manuscript submitted 30.10.2017

 

Radio phys. radio astron. 2017, 22(4): 294-303  

REFERENCES

1. RYABOV, M. I., PANISHKO, S. K. and GUGLYA, L. I., 2011. Space weather impacts on the Earth’s upper atmosphere according to the monitoring of powerful radio sources fluxes at the URAN-4 radio telescope (Instituteof Radio Astronomy, NAS of Ukraine). Odessa Astronomical Publications. vol. 24, pp. 159–161 (in Russian).

2. ZELENY, L. M. and VESELOVSKY, I. S., eds. 2008. Plasma Heliogeophysics. Vol. 1-2. Moscow, Russia: Fizmatlit. Publ. (in Russian).

3. RUZHIN, YU. YA. and KUZNETSOV, V. D., eds. 2015. Electromagnetic and plasma processes from the Sun to the Core of the Earth. Moscow, Russia: IZMIRAN Publ. (in Russian).

4. MIROSHNICHENKO, L. I., 2011. Physics of the Sun and solar-terrestrial relations.Moscow, Russia: Universitetskaya Kniga Publ. (in Russian).

5. VITINSKY, YU. I., OL’, A. I. and SAZONOV, B. I., 1975. The Sun and the Earth’s Atmosphere. Leningrad, USSR: Gidrometeoizdat Publ. (in Russian).

6. DRUZHININ, I. P., SAZONOV B. I. and YAGODINSKIY, V. N., 1974. Space-Earth. Forecasts. Moscow, Russia: Mysl’ Publ. (in Russian).

7. SMOLENTSEV, N. K., 2005. Introduction to the theory of wavelets. Moscow-Izhevsk, Russia: NITS “Regulyarnaya i Khaoticheskaya Dinamika” Publ. (in Russian).

8. IVANOV-KHOLODNYI, G. S. and NIKOLSKY, G. M., 1969. The Sun and Ionosphere (short wave solar radiation and its effect on the ionosphere). Moscow, Russia: Nauka publ. (in Russian).

 


Keywords


upper atmosphere; solar activity; geomagnetic activity; space weather

Full Text:

PDF


Creative Commons License

Licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0) .