The 1990 NIST scales of thermal radiometry
نویسندگان
چکیده
منابع مشابه
The 1990 NIST Scales of Thermal Radiometry
Following an absolute NIST measurement of the freezing temperature of gold and the adoption of the International Temperature Scale of 1990 (ITS-90), NIST has adopted new measurement scales for the calibration services based on thermal radiometry. In this paper, the new scales are defined and compared to the ITS-90, and the effects of the scale changes on NIST measurement services in optical pyr...
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A portable Thermal-Infrared Transfer Radiometer (TXR) has been developed for use in intercomparisons and scale verifications of sources used to calibrate thermal-infrared (TIR) channels of the National Aeronautics and Space Administration’s (NASA’s) Earth Observing System (EOS) flight instruments. The TXR is designed to measure the radiance temperature of large area blackbody sources in cryogen...
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We report on multiple improvements made in the calibration services offered for thermal converters and thermal transfer standards in the ac-dc Difference Standards and Measurement Techniques Project at NIST during the past year. The major improvement in this calibration is the increased efficiency made possible by the consolidation of three disparate calibration services – low voltage thermal t...
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ژورنال
عنوان ژورنال: Journal of Research of the National Institute of Standards and Technology
سال: 1990
ISSN: 1044-677X
DOI: 10.6028/jres.095.050