Cosmic ray solar diurnal and sidereal variations ...

• Main Author: Juwono, Alamsyah M
• Format: Thesis
• Language: unknown
• Published: University Of Tasmania 2023
• Subjects: Antarc*; Antarctica
• Online Access: https://dx.doi.org/10.25959/23232116; https://figshare.utas.edu.au/articles/thesis/Cosmic_ray_solar_diurnal_and_sidereal_variations/23232116

Data from underground cosmic ray observatories at Cambridge and Liapootah, Tasmania and Mawson, Antarctica, have been studied to determine the amplitudes of Solar Diurnal Variations for period of 11 years, 1982-1992, for Cambridge and Mawson observatories, and for 1992-1993 for Liapootah observatory. The amplitudes are estimated for either monthly average or yearly average, for ground based and free space as well. The monthly Solar Diurnal Variations have been shown to be contaminated by Sidereal component, and by using method of the sinusoidal fittings, the amplitudes of Solar Diurnal Variation and the Sidereal component of the variation have been extracted. The results of extracting the monthly Solar Diurnal Variations are (0.104 ± 0.004 %), (0.116 ± 0.006 %) for Cambridge, (0.090 ± 0.004 %) for Mawson and (0.060 ± 0.008 %) for Liapootah. The amplitudes of Sidereal component contaminating the Solar Diurnal Variations also have been found. These sidereal amplitudes are (0.043 ± 0.006 %) and ...