ISO 2533:1975 standard atmosphere.
Includes ISO 2533:1975/Add 1:1985 which provides hypsometrical tables, that is geopotential altitude as a function of barometric pressure.
Includes ISO 2533:1975/Add 2:1997 which extends the standard atmosphere from -2000 m down to -5000 m geopotential altitude.
Since ISO 2533 is intended for use in calculations and design of flying vehicles, we use the term ‘altitude’ instead of ‘height’ or ‘elevation’.