The effects of NOAA-20 VIIRS solar diffuser stability monitor (SDSM) relative spectral response (RSR) on the solar diffuser (SD) degradation estimations

Choi, Taeyoung J.

doi:10.1117/12.2593935

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The NOAA IR serves as an archival repository of NOAA-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by NOAA or funded partners. As a repository, the NOAA IR retains documents in their original published format to ensure public access to scientific information.

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The effects of NOAA-20 VIIRS solar diffuser stability monitor (SDSM) relative spectral response (RSR) on the solar diffuser (SD) degradation estimations

2021
By Choi, Taeyoung J.
Source: Earth Observing Systems XXVI, 118, 29

[PDF-602.48 KB]

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Journal Title:

Earth Observing Systems XXVI
Personal Author:

Choi, Taeyoung J.
NOAA Program & Office:

NESDIS (National Environmental Satellite, Data, and Information Service) ; STAR (Center for Satellite Applications and Research)

NESDIS (National Environmental Satellite, Data, and Information Service) ; STAR (Center for Satellite Applications and Research) Less -
Description:

Solar Diffuser (SD) has been used for on-orbit imaging sensors such as historical Terra and Aqua Moderate Resolution Imaging Spectroradiometer (MODIS) and next generation NOAA’s Visible Infrared Imaging Radiometer Suite (VIIRS) sensors. The SD provides radiometric calibration reference for Reflective Solar Bands (RSB) and it also carries ground calibration to on-orbit. There have been slight discrepancies in the long-term radiometric calibration using SD and moon. Even though there have been some studies and publications to explain these differences, the differences were assumed to be the viewing angle differences to the SD. Using a Surface Roughness-induced Rayleigh Scattering (SRRS), we tested the current SD degradation estimation algorithms and found that the center wavelength based current SD estimation algorithm over-estimated SD degradations up to one percent level in the shortest wavelength band after two years of operation. Instead of using the center wavelength approach, the correct SD degradation was estimated by using the Relative Spectral Response (RSR) function of the SDSM detectors. After applying the correct SD degradation, the on-orbit calibration coefficients were very consistent with the moon based calibration.
Source:

Earth Observing Systems XXVI, 118, 29
DOI:

https://doi.org/10.1117/12.2593935
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pdf
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SPIE
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Journal Article
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urn:sha-512:68486c33d35d04d081cdb296046d6ae958c4314b2106da03934ca13a6e7667115ba7b0c802583188c5a94ad640bd39c4f310c75f8f9cd4a4127d6b2fd88644e0
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The effects of NOAA-20 VIIRS solar diffuser stability monitor (SDSM) relative spectral response (RSR) on the solar diffuser (SD) degradation estimations

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