All the functionality of Miscellaneous`StandardAtmosphere`is now available in the newly created Standard Atmosphere Package.
To access functionality from the new Standard Atmosphere Package, load StandardAtmosphere`:
Version 5.2
![<< Miscellaneous`StandardAtmosphere`;
MeanParticleSpeed[5000 Meter]](Files/StandardAtmosphere.en/legacy_1.gif)
Many functions from Miscellaneous`StandardAtmosphere` are now found in the Standard Atmosphere Package: