Selection of the Solar-Diurnal Anisotropy of Cosmic Rays by Local and Global Methods

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Abstract

According to the data of Moscow neutron monitor, using harmonic analysis, the characteristics of
the solar-diurnal anisotropy of cosmic rays on quiet days have been obtained for a long period from 1965 to
2020. It has been established that the average diurnal variation of cosmic rays at the Moscow neutron monitor
is almost completely described by two harmonics of the solar-diurnal anisotropy and does not contain signs
of other influences. A comparison with the average daily characteristics of the equatorial component of cosmic
rays vector anisotropy, obtained from the data of the worldwide neutron monitor network using the global
survey method showed a good agreement between the results of the two methods. From a comparison of local
and global results, estimates were obtained for the coupling coefficients of the first harmonic of the cosmic
ray anisotropy for the Moscow neutron monitor, and a new experimental method for calculating the coupling
coefficients of individual detectors was proposed. The limitations of the local method, as well as the possibility
of continuing and expanding this study, have been discussed and justified

About the authors

A. V. Belov

Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation,
Russian Academy of Sciences (IZMIRAN)

Email: abelov@izmiran.ru
Moscow, Troitsk, 142191 Russia

N. S. Shlyk

Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation,
Russian Academy of Sciences (IZMIRAN)

Email: nshlyk@izmiran.ru
Moscow, Troitsk, 142191 Russia

M. A. Abunin

Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation,
Russian Academy of Sciences (IZMIRAN)

Email: nshlyk@izmiran.ru
Moscow, Troitsk, 142191 Russia

A. A. Abunin

Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation,
Russian Academy of Sciences (IZMIRAN)

Email: nshlyk@izmiran.ru
Moscow, Troitsk, 142191 Russia

V. A. Oleneva

Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation,
Russian Academy of Sciences (IZMIRAN)

Email: nshlyk@izmiran.ru
Moscow, Troitsk, 142191 Russia

V. G. Yanke

Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation,
Russian Academy of Sciences (IZMIRAN)

Email: nshlyk@izmiran.ru
Moscow, Troitsk, 142191 Russia

A. A. Melkumyan

Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation,
Russian Academy of Sciences (IZMIRAN)

Author for correspondence.
Email: nshlyk@izmiran.ru
Moscow, Troitsk, 142191 Russia

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Copyright (c) 2023 А.В. Белов, Н.С. Шлык, М.А. Абунина, А.А. Абунин, В.А. Оленева, В.Г. Янке, А.А. Мелкумян