Abstract
A scintillator muon telescope was installed at the Hobart Campus of the University of Tasmania (42.85°S, 147.42°E), Australia in December 1991. It is part of a North-South Network of Multi-Directional Cosmic Ray Muon Surface Telescopes, in conjunction with the Nagoya Cosmic Ray Muon Telescope (35.12°N, 136.97°E). Using two years of data from the North-South Network, we have investigated the average features of the solar diurnal and semi-diurnal variations. Preliminary results of the analysis show that two years averages of the observed diurnal variations are composed of a north-south symmetric and an asymmetric variations. The north-south asymmetric diurnal variation is consistent with that expected from the semi-diurnal anisotropy which produces the observed semi-diurnal variation. It is shown that the reference axis of the anisotropy is in the direction of about 7°S sunward from the ecliptic.
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