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Develop, operate and maintain reference radiation instrumentation for solar and infrared (terrestrial) radiation as well as atmospheric turbidity measurements. Initiate and support …

The Division develops, maintains and disseminates the national measurement standards for ionizing radiation and radioactivity, and methods and models to address related applications.

Primary metrological references for solar (shortwave) & terrestrial (longwave) radiation are instrument-based, managed by PMOD/WRC. New references (new instruments) have been …

The World Standard Group (WSG) is currently a group of six cavity pyrheliometers (see Figure 1) which define the World Radiometric Reference (WRR). The WSG was first established in …

Radiation Centres World, Regional and National Radiation Centres World, Regional and National Radiation Centres were established under the auspices of CIMO. The World Standard …

Comparisons of instruments proposed as new terrestrial radiation references would provide suitable traceability to SI (comparison mechanism should be suitable for establishing Key …

Regular participation in international comparisons and submissions to the International Reference System (SIR) demonstrates the equivalence of NIST standards with those of other metrology …

Core nuclear structure and decay database containing evaluated (recommended) data for 3,171 nuclides, organized in over 17,269 individual datasets.

Attempts to harmonize and homogenize the solar radiation measurements have led to a number of radiation standards and irradiance scales, either conventional or traceable to SI