ESDU 88025 gives data and methods of analysis for deriving true airspeed@ Mach number@ pressure height and ambient air temperature from registered values of total pressure and temperature@ and static pressure. The methods apply for Mach numbers between approximately 4 and 10 and for heights up to 65 km (210 000 ft). Such air data are of particular importance where they are used to control an air-breathing propulsion unit. The assumptions and limitations of the methods are clearly stated and explained@ and a worked example illustrates the use of graphs and tables for the properties of equilibrium air behind a normal shock which are then used with the Rankine-Hugoniot relationships to derive the required data. ESDUpac A8825 gives as three random access ASCII files on disc a more extensive range of properties than those presented graphically.
ESDU 88025 D-2007 history
2007ESDU 88025 D-2007 Derivation of primary air-data parameters for hypersonic flight.