1998, was 0.11 ??C, i.e. from 317.15 K up to 317.26 K.Let us examine another case.April 6, 2007, AT 19:01 UT, data taken from the meteorological station in Monterrey, MX, located at 25?? 48?? North latitude and 100?? 19' West longitude, and an altitude of 513 m ASL:Ts = 316.95 KT??? = 305.45 KDensity of dry air (d) = 1.168 kg/m^3Dry Air volumetric expansion Coefficient (??) = 3.16 x 10^-3 K ^-1Kin