  We analyze the sidereal daily variations observed between 1985 and 2006 at
Matsushiro, Japan (MAT) and between 1993 and 2005 at Liapootah, Tasmania (LPT).
These stations comprise the two hemisphere network (THN) of underground muon
detectors in Japan and Australia. Yearly mean harmonic vectors at MAT and LPT
are more or less stable without any significant change in phase and amplitude
in correlation with either the solar activity- or magnetic-cycles. In this
paper, therefore, we analyze the average anisotropy over the entire observation
periods, i.e. 1985-2006 for MAT and 1993-2005 for LPT. We apply to the THN data
a best-fitting analysis based on a model anisotropy in space identical to that
adopted by Amenomori et al. (2007) for Tibet III data. The median energies of
primary cosmic rays recorded are ~0.5 TeV for THN and ~5 TeV for the Tibet III
experiment. It is shown that the intensity distribution of the best-fit
anisotropy is quite similar to that derived from Tibet III data, regardless of
the order of magnitude difference in energies of primary particles. This,
together with the THN observations, confirms that the analysis by Amenomori et
al. (2007) based on the Tibet III experiment in the northern hemisphere is not
seriously biased. The best-fit amplitudes of the anisotropy, on the other hand,
are only one third or less of those reported by the Tibet III experiment,
indicating attenuation due to solar modulation. The rigidity dependence of the
anisotropy amplitude in the sub-TeV region is consistent with the spectrum
reported by Hall et al. (1999), smoothly extending to the Tibet III result in
the multi-TeV region. The amplitude at higher energies appears almost constant
or gradually decreasing with increasing rigidity.
