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Abstract
A world infrared irradiance standard was established by the World Infrared Radiometer Calibration Center (WIRCC) at the World Radiation Center (WRC) in Davos, Switzerland, in 2006 following the recommendation at the thirteenth session of the World Meteorological Organization (WMO) / Commission for Instruments and Methods of Observation (CIMO). The Aerological Observatory of the Japan Meteorological Agency (Tateno Baseline Surface Radiation Network (BSRN) station) examined the difference in longwave radiation observations by the world standard and Tateno's own standard. The observations agreed well with each other, and the maximum difference was much less than the uncertainty in the world infrared irradiance standard. Almost no dependence on the value of longwave radiation and the body temperature of the pyrgeometer was found. Based on these results, Tateno started employing the world infrared irradiance standard in January 2008 and the longwave radiation observations at Tateno are now traceable to the World Infrared Standard Group (WISG). Tateno observes shortwave and longwave radiation with global traceability and provides the data via the BSRN data archive.
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