A High Energy Parameterization of
s
inel
(p-air),
useful for calculating Neutrino Fluxes
s
inel
(p-air) =
s
0
[1+ a
0
ln(E
lab
/1000)],
s
0
= 297.20 mb , a
0
= 0.04879, E
lab
in GeV.
