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

Donald F. Heath; Georgi Georgiev

doi:10.1117/12.892109

13 September 2011 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

Donald F. Heath, Georgi Georgiev

Author Affiliations +

Proceedings Volume 8153, Earth Observing Systems XVI; 81530V (2011) https://doi.org/10.1117/12.892109
Event: SPIE Optical Engineering + Applications, 2011, San Diego, California, United States

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 Spectralon^TM. 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.

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Donald F. Heath and Georgi Georgiev "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", Proc. SPIE 8153, Earth Observing Systems XVI, 81530V (13 September 2011); https://doi.org/10.1117/12.892109

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