Abstract content <br> (Max 300 words)<br><a href="http://events.saip.org.za/getFile.py/access?resId=0&materialId=0&confId=34" target="_blank">Formatting &<br>Special chars</a>
The modulation of galactic cosmic rays at Earth can be calculated using approximate solutions of the Parker Transport equation, as described by the modulation potential φ. Usoskin et al. (2005) calculated φ for a given interstellar spectrum (LIS), by using the force field solution and neutron monitor data since 1951. In reconstructing the cosmic-ray intensity in the distant past, McCracken and Beer (2007) used these modulation potential as well as 10Be data and ionization chambers data and neutron monitor data. In this project we re-evaluate these modulation parameters using updated atmospheric yield functions, as well as the most recent estimates of the LIS derived from Voyager observations.
Level for award<br> (Hons, MSc, <br> PhD)?
Apply to be<br> considered for a student <br> award (Yes / No)?
Main supervisor (name and email)<br>and his / her institution
Dr. Helena Kruger
Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?