Muon Solar Daily Variation at a Depth of 60 Metres Water Equivalent

Nature ◽  
1967 ◽  
Vol 215 (5097) ◽  
pp. 146-147 ◽  
Author(s):  
D. S. PEACOCK ◽  
T. THAMBYAHPILLAI
Keyword(s):  
Daily Variation ◽  
Solar Daily Variation

World-Wide Changes in the Phase of the Cosmic-Ray Solar Daily Variation

Nature ◽  
1953 ◽  
Vol 171 (4360) ◽  
pp. 918-920 ◽  
Author(s):  
T. THAMBYAHPILLAI ◽  
H. ELLIOT
Keyword(s):  
World Wide ◽  
Daily Variation ◽  
Cosmic Ray ◽  
Solar Daily Variation

scholarly journals Spectral analysis of geomagnetic data from Kandilli Observatory, Istanbul

1997 ◽  
Vol 40 (6) ◽  
Author(s):  
A. H. Bilge ◽  
Y. K. Tulunay
Keyword(s):  
Daily Variation ◽  
Second Harmonic ◽  
Field Variation ◽  
Maximal Power ◽  
Third Harmonic ◽  
The Third ◽  
Geomagnetic Data ◽  
Deterministic Components ◽  
Equal Power ◽  
Solar Daily Variation

The geomagnetic field variation spectra for periods longer than 2 h are analysed using the data obtained at the Kandilli Observatory in Istanbul, Turkey. Among the deterministic components, only the harmonics of the solar daily variation (Si) and the second harmonic of the lunar daily variation (L2) were observed. The seasonal dependence of the D component is analysed; the first harmonic of the solar daily variation (S1) has maximum power in summer, decreasing symmetrically towards the winter; the second harmonic (S2) has equal power in spring, summer and fall, while the third harmonic (S3) has maximal power in spring and fall.

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