Study of Higher Harmonics of Cosmic Ray Intensity on Quiet Days at Deep River Neutron Monitoring Station
International Journal of Astrophysics and Space Science
Volume 3, Issue 2-1, March 2015, Pages: 4-6
Received: Jan. 2, 2015;
Accepted: Mar. 9, 2015;
Published: Mar. 18, 2015
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M. K. Richharia, Department of Physics, Govt. Science College (Autonomous) Jabalpur (M.P.), India
The cosmic ray (CR) intensity data recorded with Deep River Neutron Monitoring Station have been investigated on quietest days (QD) for higher harmonics of daily variation during solar cycle 21 and 22. It has been observed that inspite of the abrupt change in the amplitude and phase of tri-diurnal and quart diurnal anisotropy in CR intensity, the amplitude of third harmonic is quite significant throughout the period of investigation with larger amplitude during the year 1980 and 1985. Thus, tri-diurnal anisotropy clearly shows 11 year variation at mid latitude neutron monitoring station.
M. K. Richharia,
Study of Higher Harmonics of Cosmic Ray Intensity on Quiet Days at Deep River Neutron Monitoring Station, International Journal of Astrophysics and Space Science. Special Issue:Modulation of Cosmic Rays, Inter Planetary Magnetic Field, Magnetic Storm, Large and Small Amplitude Wave Train.
Vol. 3, No. 2-1,
2015, pp. 4-6.
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