Assessment of VIIRS DNB on-orbit calibration performance using Dome C observations

Ashish Shrestha; Xiaoxiong Xiong; Sherry Li; Truman Wilson

doi:10.1117/12.2633074

30 September 2022 Assessment of VIIRS DNB on-orbit calibration performance using Dome C observations

Ashish Shrestha, Xiaoxiong Xiong, Sherry Li, Truman Wilson

Proceedings Volume 12232, Earth Observing Systems XXVII; 122321E (2022) https://doi.org/10.1117/12.2633074
Event: SPIE Optical Engineering + Applications, 2022, San Diego, California, United States

Conference Poster

Abstract

The Visible Infrared Imaging Radiometer Suite (VIIRS) instruments onboard the Suomi National Polar-orbiting Partnership (SNPP) and NOAA-20 (N20) satellites have been operational since their launch on October 28, 2011 and November 18, 2017, respectively. VIIRS has 22 spectral bands with wavelengths ranging from visible (VIS) to long-wave infrared (LWIR). Observations from both the SNPP and N20 VIIRS sensors have been used to develop a wide range of data products that have benefited a number of studies of the Earth’s atmosphere, land, and oceans. Among these 22 VIIRS bands, the day/night band (DNB) is a visible/near-infrared panchromatic band. It has three gain stages: low-gain stage (LGS), medium-gain stage (MGS), and high-gain stage (HGS), which allows us to study the Earth at any time of day or night. With its HGS, the DNB can also observe reflected lunar radiances at night. This research uses numerous daily observations of the reflected lunar radiances at night from Dome-C to investigate the long-term calibration stability of the DNB and the calibration consistency between the two VIIRS sensors. The VIIRS DNB measured lunar radiances are compared to those predicted by the GIRO (GSICS Implementation of the ROLO) model.

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Ashish Shrestha, Xiaoxiong Xiong, Sherry Li, and Truman Wilson "Assessment of VIIRS DNB on-orbit calibration performance using Dome C observations", Proc. SPIE 12232, Earth Observing Systems XXVII, 122321E (30 September 2022); https://doi.org/10.1117/12.2633074

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