Sea level cosmic ray proton spectrum and rising of proton-air collision cross section from Yekutieli model

The sea level proton spectrum has been calculated from the satellite data on primary cosmic ray nucleon spectrum using Yekutieli's nucleon cascade model (see abstr. A65035 of 1974). The interaction parameters yield the absorption cross section of p-air interaction which is in agreement with measured EAS experimental results in the spectral energy range 106-109 GeV/c.