Solar Diurnal and Semi-Diurnal Variations of Cosmic Rays Observed by the North-South Network or Surface-Level Multi-Directional Muon Telescopes
| Autor: | S. Yasue, Kazuoki Munakata, M. L. Duldig, Z. Fujii, Chihiro Kato, S. Akahane, A. G. Fenton, S. Sakakibara, K. Fujimoto, Satoru Mori, K. B. Fenton, H. Ueno, J. E. Humble |
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| Rok vydání: | 1995 |
| Předmět: |
Physics
Muon Conjunction (astronomy) Diurnal temperature variation Astrophysics::Instrumentation and Methods for Astrophysics Ecliptic Astronomy Cosmic ray Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics law.invention Telescope law Physics::Space Physics General Earth and Planetary Sciences Astrophysics::Earth and Planetary Astrophysics Variation (astronomy) Anisotropy Physics::Atmospheric and Oceanic Physics General Environmental Science |
| Zdroj: | Journal of geomagnetism and geoelectricity. 47:1079-1084 |
| ISSN: | 0022-1392 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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