Spectroradiometry of the Solar Corona on the RATAN-600

V. M. Bogod; Богод В. М.; M. K. Lebedev; Лебедев М. К.; N. E. Ovchinnikova; Овчинникова Н. Е.; A. M. Ripak; Рипак А. М.; A. A. Storozhenko; Стороженко А. А.

doi:10.31857/S0023420623010016

Spectroradiometry of the Solar Corona on the RATAN-600

Authors: Bogod V.M.¹, Lebedev M.K.¹, Ovchinnikova N.E.¹, Ripak A.M.¹, Storozhenko A.A.¹
Affiliations:
1. St. Petersburg Branch, Special Astrophysical Observatory of the Russian Academy of Sciences, St. Petersburg, Russia
Issue: Vol 61, No 1 (2023)
Pages: 31-38
Section: Articles
URL: https://rjsvd.com/0023-4206/article/view/672695
DOI: https://doi.org/10.31857/S0023420623010016
EDN: https://elibrary.ru/FHGJCF
ID: 672695

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Abstract
About the authors
References
Supplementary files
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Abstract

Modern studies of solar radio emission are complicated by continuous power amplification and multifrequency external interference, which often completely overlap important frequency ranges. Many topical problems in solar radio astronomy require large effective areas of radio telescopes, high frequency and time resolutions, accurate spatial measurements, and a large dynamic range. It becomes relevant to change the concept of receiving recording equipment. This paper deals with topical problems of the physics of the solar corona in combination with optimal methods of observation with large instruments. The features and difficulties of combining high parameters—dynamic, spatial, temporal, and frequency resolutions—are considered. The proposed solutions of the new-generation observation complex implement the possibilities of intelligent selection of registration conditions in a multioctave mode with multichannel over 8000 channels/GHz with temporary permission up to 8 ms/spectrum. A multiobject observation mode becomes available from powerful flaring objects to faint structures of various nature. High-speed data processing makes it possible to implement an online mode of interference elimination, which is based on a fast statistical analysis of the spectrum with the selection of non-Gaussian (interference) structures. Methods for high-speed analysis of large-volume data (the principal component analysis method) and their presentation to the user are proposed. Examples of the operation of the complex in the range of 1–3 GHz are given. The prospects of a new approach for multiobject radio astronomy observations in the implementation of the RATAN-600 tracking mode are considered: from recombination lines to wide-range spectra, from low-contrast fluctuations to fast changes in flares, etc.

References

Khaikin V.B., Storozhenko A.A., Bogod V.M. Radioheliographs and Radio Reflectors in Solar Plasma Studies // Astrophysical Bulletin. 2019. V. 74. P. 221–233. https://doi.org/10.1134/S1990341319020111
Bogod V.M. Prospects for Ground-Based Solar Radio Astronomy in Russia // Proceedings of All-Russian Conference “Ground-Based Astronomy in Russia. 21st Century”. Nizhny Arkhyz. 2020. P. 399–404. https://doi.org/10.26119/978-5-6045062-0-2_2020_399
Bogod V.M., Yasnov L.V. Determination of the Structure of the Coronal Magnetic Field Using Microwave Polarization Measurements // Solar Physics. 2016. V. 291. P. 3317–3328. https://doi.org/10.1007/s11207-016-0936-8
Bogod V.M., Kaltman T.I. The magnetosphere of solar active region by radio observations in a wide wavelength range // Astronomical & Astrophysical Transactions. 2019. V. 31. № 3. https://doi.org/10.31361/eaas.2018-2.008
Bastian T., Gary D.E., Fleishman G.D. et al. Measuring Coronal Magnetic Fields with the Jansky Very Large Array and RATAN Telescopes // American Geophysical Union, Fall Meeting 2019. Abstract #SH41B-05.
Yasnov L.V., Bogod V.M., Gofman A.A. Spectrum and physical conditions in microflare generation regions at decimeter-wave frequencies // Astrophysical Bulletin. 2017. V. 72. № 1. P. 58–66. https://doi.org/10.1134/S1990341317030075
Nakariakov V.M., Anfinogentov S., Storozhenko A.A. et al. Quasi-periodic Pulsations in a Solar Microflare // The Astrophysical Journal. 2018. V. 859. № 2. P. 154. https://doi.org/10.3847/1538-4357/aabfb9
Karlický M., Rybák J., Monstein C. Fourier Power Spectra of Solar Noise Storms // Solar Physics. 2018. V. 293. № 10. P. 143. https://doi.org/10.1007/s11207-018-1367-5
Дравских А.Ф., Дравских Ю.А. О возможности наблюдений линий водорода // Астрономический журнал. 2021. Т. 98. № 8. С. 694–704. https://doi.org/10.31857/S0004629921080041
Khersonskii V.K., Varshalovich D.A. The possibility of observing recombination lines in solar radiation // Астрономический журнал. 1980. Вып. 57. С. 621–623.
Dravskikh A.F., Peterova N.G., Topchilo N.A. Profile of the 9.85-GHz Neutral Hydrogen Line // Astronomy Reports. 2019. V. 68. № 3. P. 229–237. https://doi.org/10.1134/S1063772919030028
Богод В.М., Лебедев М.К., Овчинникова Н.Е. и др. Спектрорадиометрия солнечной короны на крупных инструментах // Cб. докладов Всероссийской конференции “Физика солнечной плазмы”. ИКИ 7–11 февраля 2022.
Lebedev M.K., Ripak A.M., Bogod V.M. High-Speed Spectroradiometry using a Statistical Method of RFI Suppression for Radio Observations with RATAN-600 // Proceedings of the All-Russian Conference “Ground-Based Astronomy in Russia. 21st Century”, Nizhny Arkhyz, Russia, September 21–25, 2020. P. 413. https://doi.org/10.26119/978-5-6045062-0-2_2020_399
Tsybulev P.G. New-generation data acquisition and control system for continuum radio-astronomic observations with RATAN-600 radio telescope: Development, observations, and measurements // Astrophysical Bulletin. 2011. V. 66. Iss. 1. pp. 109–122.https://doi.org/10.1134/S199034131101010X
Nita G.M. Spectral kurtosis statistics of transient signals // MNRAS. 2016. V. 458. P. 2530–2540. https://doi.org/10.1093/mnras/stw550
Yujiang Dou, Gary D.E, Zhiwei Liu et al. The Korean Solar Radio Burst Locator (KSRBL) // Publications of the Astronomical Society of the Pacific. 2009. V. 121. № 879. P. 512–526. https://doi.org/10.1086/599624
Bro R., Smilde A.K. Principal component analysis // Analytical Methods. 2014. V. 6. P. 2812–2831. https://doi.org/10.1039/c3ay41907j
Storozhenko A., Lebedev M., Ovchinnikova N. et al. Tracking mode in the southern sector with the periscope of the RATAN-600 radio telescope // Proceedings of all-Russian conference, September 21–25, 2020 Nizhny Arkhyz, 2020 at Special Astrophysical Observatory of RAS. https://doi.org/10.26119/978-5-6045062-0-2 2020_407
Стороженко А.А., Богод В.М., Лебедев М.К. и др. Система автоматического управления приемным зеркалом РАТАН-600 для режима слежения // XXV Всероссийская ежегодная конференция “Солнечная и солнечно-земная физика – 2021”, Санкт-Петербург, 4–8 октября 2021 г. https://doi.org/10.31725/0552-5829-2021-249-252