Heliospheric modulation strength during the neutron monitor epoch

Details Heliospheric modulation strength during the neutron monitor epoch Heliospheric modulation strength during the neutron monitor epoch

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001icrc....9.3810u&link_type=abstract

Proceedings of the 27th International Cosmic Ray Conference. 07-15 August, 2001. Hamburg, Germany. Under the auspices of the Int

Physics

1

Scientific paper

Using a simple stochastic 1D simulation model of the heliosphere we calculate galactic cosmic ray spectra at the Earth's orbit for different values of the heliospheric modulation strength Φ. Convoluting these spectra with the specific yield function of a neutron monitor, we obtain the expected neutron monitor count rates for different values of Φ. We present here a normalization method which allows to easily estimate the value of Φ on the basis of actually recorded neutron monitor count rates. By means of this approach we estimate the heliospheric modulation strength for the neutron monitor era using long-term records of count rates from the high-latitude Oulu and mid-latitude Hermanus neutron monitors.

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