Air Temperature Measurement Standards

Such shields can create temperature errors of several degrees celsius when the wind is calm less than 1 m sec and.

Air temperature measurement standards.

Temperature measurement standards astm s temperature measurement standards provide the material and property specifications as well as guides for the testing calibration and use of laboratory industrial and clinical instruments used in the determination of thermal variables particularly temperature. Over level terrain earth or sod typical of the area around the station and at least 100 feet from any extensive concrete or paved surface. Surface air temperature measurement goals characterize sources of measurement uncertainty evaluate performance of analog thermometer measurements made by national weather service united states historical climatology network ushcn and antecedents uncertainty claims ranging from 0 7 mk to 0 2 c compare analog and digital. Prior to 2009 the sensor was housed in a naturally ventilated radiation shield.