Effect of the SDSM detector relative spectral response in determining the degradation coefficient of the SNPP VIIRS solar diffuser reflectance

Ning Lei; Zhipeng Wang; Jon Fulbright; Xiaoxiong Xiong

doi:10.1117/12.2024415

23 September 2013 Effect of the SDSM detector relative spectral response in determining the degradation coefficient of the SNPP VIIRS solar diffuser reflectance

Ning Lei, Zhipeng Wang, Jon Fulbright, Xiaoxiong Xiong

Author Affiliations +

Proceedings Volume 8866, Earth Observing Systems XVIII; 88661I (2013) https://doi.org/10.1117/12.2024415
Event: SPIE Optical Engineering + Applications, 2013, San Diego, California, United States

Abstract

The Visible/Infrared Imager Radiometer Suite (VIIRS) instrument aboard the Suomi National Polarorbiting Partnership (SNPP) satellite performs its radiometric calibration in the reflective solar bands (RSB) wavelength region primarily through observing the sunlight scattered from the onboard Solar Diffuser (SD). The degradation (over time) of the SD reflectance is determined by the onboard Solar Diffuser Stability Monitor (SDSM). The SDSM detector relative spectral response (RSR) over the out-ofband (OOB) wavelength region leads to a non-negligible bias to the originally determined SD degradation coefficient over wavelengths from 412 nm to 488 nm. In this Proceeding, we consider the out-of-band contribution to determine the bias. Our computation shows that the bias to the degradation coefficient is larger at a shorter wavelength and increases with time. On the 564th day after launch (~ orbit 8000), at a wavelength of 412 nm, the bias (OOB-corrected – not-OOB-corrected) has a mean of -0.021, and at a wavelength of 445 nm, the bias has a mean of -0.009.

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Ning Lei, Zhipeng Wang, Jon Fulbright, and Xiaoxiong Xiong "Effect of the SDSM detector relative spectral response in determining the degradation coefficient of the SNPP VIIRS solar diffuser reflectance", Proc. SPIE 8866, Earth Observing Systems XVIII, 88661I (23 September 2013); https://doi.org/10.1117/12.2024415

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