Cosmic ray sidereal diurnal variation of galactic origin observed by neutron monitors

Details Cosmic ray sidereal diurnal variation of galactic origin observed by neutron monitors Cosmic ray sidereal diurnal variation of galactic origin observed by neutron monitors

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985icrc....5...31i&link_type=abstract

In NASA. Goddard Space Flight Center 19th Intern. Cosmic Ray Conf., Vol. 5 p 31-34 (SEE N85-34991 23-93)

Physics

Cosmic Rays, Diurnal Variations, Neutron Counters, Polarity, Sidereal Time, Solar Magnetic Field, Errors, Statistical Analysis

Scientific paper

Cosmic ray sidereal diurnal variations observed by neutron monitors are analyzed for the period 1961 to 1978, by adding 134 station years data to the previous paper (Nagashima, et al., 1983). Also the dependence of the sidereal variations on Sun's polar magnetic field polarity is examined for two periods; the period of negative polarity in the northern region, 1961 to 1969 and the period of positive polarity, 1970 to 1978. It is obtained that for the former period, the amplitude A=0.0203 + or 0.0020% and the phase phi=6.1 + or - 0.4 h LST and for the latter period, 0.0020% and phi=8.6 + or - 4 h LST, respectively.

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