  We study the role of drift effect in the temporal changes of the anisotropy
of galactic cosmic rays (GCRs) and the influence of the sector structure of the
heliospheric magnetic field on it. We analyze the GCRs anisotropy in the Solar
Cycle 24 and solar minimum 23_24 with negative polarity for the period of
2007-2009 and near minimum 24_25 with positive polarity in 2017-2018 using data
of global network of Neutron Monitors. We use the harmonic analyses method to
calculate the radial and tangential components of the anisotropy of GCRs for
different sectors (plus corresponds to the positive and minus to the negative
directions) of the heliospheric magnetic field. We compare the analysis of GCRs
anisotropy using different evaluations of the mean GCRs rigidity related to
Neutron Monitor observations. Then the radial and tangential components are
used for characterizing the GCRs modulation in the heliosphere. We show that in
the solar minimum 23_24 in 2007-2009 when negative, the drift effect is not
visibly evident in the changes of the radial component, i.e. the drift effect
is found to produce 4 % change in the radial component of the GCRs anisotropy
for 2007-2009. Hence the diffusion dominated model of GCRs transport is more
acceptable in 2007-2009. In turn, near the solar minimum 24_25 in 2017-2018
when positive, the drift effect is evidently visible and produce 40% change in
the radial component of the GCRs anisotropy for 2017-2018. So in the period of
2017-2018 diffusion model with noticeably manifested drift is acceptable. The
results of this work are in good agreement with the drift theory of GCRs
modulation, according to which during negative (positive) polarity cycles, a
drift stream of GCRs is directed toward (away from) the Sun, thus giving rise
to a 22-year cycle variation of the radial GCRs anisotropy.
