Aims. We studied the 27-day variations of galactic cosmic rays (GCRs) based on neutron
monitor (NM), ACE/CRIS, STEREO, and SOHO/EPHIN measurements in the solar minima …

Particles energized above the Earth's atmosphere provide unique informations about
specific physical processes in the outer space. This is an attempt to present a short review of …

We study the relationship of the 27-day variations of the galactic cosmic ray intensity with
similar variations of the solar wind velocity and the interplanetary magnetic field based on …

We show that the higher range of the heliolongitudinal asymmetry of the solar wind speed in
the positive polarity period (A> 0) than in the negative polarity period (A< 0) is one of the …

We demonstrate that the general features of the radial and azimuthal components of the
anisotropy of galactic cosmic rays can be studied by the harmonic analysis method using …

We develop a three-dimensional (3-D) model of the 27-day variation of galactic cosmic-ray
(GCR) intensity with a spatial variation of the solar wind velocity. A consistent, divergence …

We study the 27-day variations of the solar wind velocity, galactic cosmic ray (GCR) intensity
and anisotropy in the last minimum epoch of solar activity (2007–2009, A< 0). The average …

Galactic cosmic rays as observed by the Hermanus and Jungfraujoch Neutron Monitors
between 1960 and 2018 have been analysed using various spectral analysis techniques …

We study the 27-day quasi-periodic variations of the galactic cosmic ray (GCR) intensity and
three dimensional (3-D) anisotropy related with the solar rotation in different polarity periods …

We study the features of the rigidity power spectrum of the 27–day variation of the galactic
cosmic ray intensity by neutron monitors experimental data in the minima epoch for different …