Characterization and performance of optical input systems for a calibration transfer spectroradiometer

Abstract

For over three decades, the Radiometric Calibration Facility (RCF) at NASA's Goddard Space Flight Center (GSFC) has maintained calibrated uniform radiance sources for use by the global remote sensing community. As part of a continuing effort to reduce measurement uncertainties while improving efficiency, the calibration transfer hardware and operational protocols are systematically examined, with improved equipment and techniques being incorporated. This paper describes the optical characterization and presents radiance measurements of a new spectroradiometer, the GSFC 750/Integrating Sphere Irradiance Collector (ISIC), using a new input optical system. The performance of the new input optical system is compared with the two previous input systems.