Helio-latitudinal cosmic ray intensity distribution. at IAU during recent sunspot cyc1e

Abstract

The yearly excursion in the heliographic latitudinal position of the earth, which is generally used for the investigation of cosmic ray density distribution, has been used in the study for the two recent intervals 1985-87 and 1988-90. The correction is estimated and is applied to obtain the cosmic ray density distribution free from the effect of solar activity variation during the period 1988-90. The cosmic ray intensity in the southern hemisphere is observed to be significantly greater than that in the northern hemisphere. Results based on observations during different phases of the solar cycle indicate, in general, larger cosmic ray density distribution in southern hemisphere at times of higher solar activity, whereas insignificant differences are observed during the period of low solar activity.