Supporting Information for "An empirical modification of the force field approach to describe the modulation of galactic cosmic rays close to Earth in a broad range of rigidities"

This supporting information provides the Data Set S1 used to produce Fig. 6 in "An empirical modification of the force field approach to describe the modulation of galactic cosmic rays close to Earth in a broad range of rigidities" (Gieseler et al., 2017). It can be used to calculate the rigidity-dependent solar modulation potential \(\phi(P)\) for monthly intervals from 1973-2017 following Eq. 10 in Gieseler et al. (2017).

If you use this data, please refer to and cite BOTH following publications:

• Gieseler, J., B. Heber, and K. Herbst, An empirical modification of the force field approach to describe the modulation of galactic cosmic rays close to Earth in a broad range of rigidities, J. Geophys. Res., 2017 (doi:10.1002/2017JA024763).
• Usoskin, I. G., G. A. Bazilevskaya, and G. A. Kovaltsov, Solar modulation parameter for cosmic rays since 1936 reconstructed from ground-based neutron monitors and ionization chambers, J. Geophys. Res., 2011 (doi:10.1029/2010JA016105).

This data set contains the solar modulation potential values in MV for monthly intervals from 1973-2017 derived from the proton proxies IMP-8 He and ACE/CRIS C (Phi_pp), and from Usoskin et al. (2011) as provided by http://cosmicrays.oulu.fi/phi/phi.html (Phi_Uso11). The uncertainties of Phi_pp are given in column 4, those of Phi_Uso11 are 26 MV for the observed period. The LIS used to calculate the modulation potentials is that from Burger et al. (2000) as given by Usoskin et al. (2005).

Column 1: Fractional year (start of interval)
Column 2: Month
Column 3: Phi_pp /MV
Column 4: Uncertainty of Phi_pp /MV
Column 5: Phi_Uso11 /MV

Data also available at http://www.ieap.uni-kiel.de/et/ag-heber/cosmicrays