FN_P

FN_P = <Quantity 0.3875717 erg / cm3>

Pressure normalization for MAS.

The dynamic pressure \(P_0 = \rho_0\,V_0^2 = m_p\,n_0\,(L_0/T_0)^2\), expressed in the preferred MAS CGS basis (erg cm⁻³). Code-unit pressure 1 maps to this value.