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Aims. We study the 27-day variations of galactic cosmic rays (GCRs) based onneutron monitor (NM), ACE/CRIS, STEREO and SOHO/EPHIN measurements, in solarminima 23/24 and 24/25 characterized by the opposite polarities of solarmagnetic cycle. Now there is an opportunity to reanalyze the polaritydependence of the amplitudes of the recurrent GCR variations in 2007-2009 fornegative A < 0 solar magnetic polarity and to compare it with the clearperiodic variations related to solar rotation in 2017-2019 for positive A > 0.Methods. We use the Fourier analysis method to study the periodicity in the GCRfluxes. Since the GCR recurrence is a consequence of solar rotation, we analyzenot only GCR fluxes, but also solar and heliospheric parameters examining therelationships between the 27-day GCR variations and heliospheric, as well as,solar wind parameters. Results. We find that the polarity dependence of theamplitudes of the 27-day variations of the GCR intensity and anisotropy for NMsdata is kept for the last two solar minima: 23/24 (2007-2009) and 24/25(2017-2019) with greater amplitudes in positive A > 0 solar magnetic polarity.ACE/CRIS, SOHO/EPHIN and STEREO measurements are not governed by this principleof greater amplitudes in positive A > 0 polarity. GCR recurrence caused by thesolar rotation for low energy (< 1GeV) cosmic rays is more sensitive to theenhanced diffusion effects, resulting in the same level of the 27-dayamplitudes for positive and negative polarities. While high energy (> 1GeV)cosmic rays registered by NMs, are more sensitive to the large-scale drifteffect leading to the 22-year Hale cycle in the 27-day GCR variation, with thelarger amplitudes in the A > 0 polarity than in the A < 0.

astronomy and astrophysics

Recurrence of galactic cosmic rays intensity and anisotropy in solar  minima 23/24 and 24/25 by ACE/CRIS, STEREO, SOHO/EPHIN and neutron monitors.  Fourier and wavelet analysis. Dedicated to the Memory of Michael Alania