Radiometric calibration history of visible and near-infrared portable radiometers

Author: Johnson B. Carol   Brown S. W.   Yoon H. W.  

Publisher: IOP Publishing

ISSN: 0026-1394

Source: Metrologia, Vol.37, Iss.5, 2000-11, pp. : 423-426

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

Previous Menu Next

Abstract

The National Institute of Standards and Technology (NIST), with the support of the National Aeronautics and Space Administration (NASA), has built several transfer radiometers that are used in radiometric measurement comparisons to validate spectral-radiance levels assigned to integrating-sphere sources by the end user. The transfer radiometers are characterized and calibrated at the NIST, and function as direct links in the spectralradiance measurement chain. This paper presents a historical analysis of a calibration method that utilizes a broadband source. Previously observed discrepancies between two radiometers are reconciled as a result.