"INTRODUCTION This Item describes the ""atmospheric model"" and gives equations and numerical data required to evaluate properties of the International Standard Atmosphere (Derivation 1) and off-standard atmospheres which differ in a prescribed way from the Standard. The basic equations for temperature@ T@ pressure@ p@ and density ?? are given in Sections 3 to 5 while the defining constants and temperature gradients are given in Tables 11.1 and 11.2. Table 11.3 gives numerical expressions for T@ p and ??while Table 11.4 gives the reverse expressions for determining pressure height for a given pressure@ and the difference between pressure height and geopotential height for specified off-standard atmospheres. The relationships between pressure@ pressure height and geopotential height are considered in Section 7 while the relationship between geopotential height and geometric height is presented in Section 8. Expressions for speed of sound and dynamic viscosity are given in Section 6. For direct reference to tabulated values of T@ ?? ??? p@ ?? ??? ?? ?? ??? a@ V*e@ q*@ and Re*//for heights up to 50 km@ see Item Nos 68046 (Reference 5) and 72018 (Reference 6). For information on the atmosphere for heights above 50 km@ see Derivation 1 (up to 80 km)@ Reference 9 and Aerodynamics Data Item No. 77021 (Reference 10) (up to 1 000 km). For information on non-standard (or other) atmospheres@ see Reference 11."
ESDU 77022 C-2008 history
2008ESDU 77022 C-2008 Equations for calculation of International Standard Atmosphere and associated off-standard atmospheres