Temperature influence on differential barometric altitude measurements

This paper evaluates the temperature influence on differential barometric altimetry, from data acquired by a prototype vertical direction measurement system. The system obtains atmospheric pressure data from two identical MEMS sensors so as to determine the absolute height difference in-between sensor devices. Matlab analysis determines indoor height accuracy in reference to calculations performed by a) the international barometric formula which is independent of temperature measurements and b) the hypsometric equation that depends on a constant temperature value in-between measurement devices; thereby, illustrating an isothermal atmosphere.