Users of meteorological observations have increasing needs for high quality meteorological and hydrological data. The traceability of these data to the International System of Units (SI) standards is needed to ensure their quality and to meet the users’ requirements. Regional Instrument Centres, as well as NMHSs calibration laboratories are essential in ensuring data quality by providing calibration of the standards and traceability to SI. CIMOXIV recognized that RICs needed guidance on how to build calibration laboratories and purchase calibration equipment to strengthen their capabilities. Therefore CIMOXIV requested the Expert Team on Regional Instruments Centres (RICs), Quality Management Systems and Commercial Initiatives to develop a recommended set of calibration equipment suited for developing countries. This IOM Report, prepared by a member of the Expert Team, Mr Drago Groselj provides a concise overview of various techniques for calibration. The main surfacebased observing parameters are overviewed: temperature, humidity and pressure. This report describes primary, secondary, working and traveling reference standards. Their performance characteristics are briefly reviewed and their application in the calibration processes is described. An assessment of their advantages and limitations is also provided. The information contained in this publication will assist specialists from RICs, as well as from NMHSs, in the modernization of present calibration systems by providing help in the selection of modern calibration equipment.
Format: Digital (Free), CD, DVD