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Proceedings Paper

Characteristics of a new type of Mie scattering volume diffuser and its use as a spectral albedo calibration standard for the solar reflective wavelength region
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Paper Abstract

Emerging instrumental requirements for remotely sensing tropospheric trace species have led to a rethinking by some of the paradigm for Système International d'Unités (SI) traceability of the spectral irradiance and radiance radiometric calibrations to spectral albedo (sr-1) which is not a SI unit. In the solar reflective wavelength region the spectral albedo calibrations are tied often to either the spectral albedo of a solar diffuser or the Moon. This new type of Mie scattering diffuser (MSD) is capable of withstanding high temperatures, and is more Lambertian than SpectralonTM. It has the potential of covering the entire solar reflective wavelength region. Laboratory measurements have shown that the specular reflectance component is negligible, and indicate that internal absorption by multiple scattering is small. This MSD, a true volume diffuser, exhibits a high degree of radiometric stability which suggests that measurements at the National Institute of Standards and Technology (NIST) could provide a spectral albedo standard. Measurements are currently in progress of its radiometric stability under a simulated space environment of high energy ionizing and ultraviolet (UV) solar radiation for its eventual use in space as a solar diffuser.

Paper Details

Date Published: 13 September 2011
PDF: 14 pages
Proc. SPIE 8153, Earth Observing Systems XVI, 81530V (13 September 2011); doi: 10.1117/12.892109
Show Author Affiliations
Donald F. Heath, Heath Earth/Space Spectroradiometric Calibration Consulting, LLC (United States)
Ball Aerospace & Technologies Corp. (United States)
Georgi Georgiev, NASA Goddard Space Flight Ctr. (United States)

Published in SPIE Proceedings Vol. 8153:
Earth Observing Systems XVI
James J. Butler; Xiaoxiong Xiong; Xingfa Gu, Editor(s)

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