Stray-light correction and prediction for Suomi National Polar-orbiting Partnership visible infrared imaging radiometer suite day-night band

Hongda Chen; Xiaoxiong Xiong; Xu Geng; Kevin A. Twedt

doi:10.1117/1.JRS.13.024521

29 May 2019 Stray-light correction and prediction for Suomi National Polar-orbiting Partnership visible infrared imaging radiometer suite day-night band

Hongda Chen, Xiaoxiong Xiong, Xu Geng, Kevin A. Twedt

Author Affiliations +

Journal of Applied Remote Sensing, Vol. 13, Issue 2, 024521 (May 2019). https://doi.org/10.1117/1.JRS.13.024521

Abstract

The Suomi National Polar-orbiting Partnership visible infrared imaging radiometer suite instrument has successfully operated since its launch in October 2011. Stray-light contamination is much larger than prelaunch expectations, and it causes a major decrease in quality of the day-night band night imagery when the spacecraft is crossing the Northern or Southern day-night terminators. The stray light can be operationally estimated using Earth-view data that are measured over dark surfaces during the new moon each month. More than 7 years of nighttime images have demonstrated that the stray-light contamination mainly depends on the Earth–Sun–spacecraft geometry, so its intensity is generally estimated as a function of the satellite zenith angle. In practice, stray-light contamination is also detector- and scan-angle-dependent. Previous methods of stray-light prediction generally rely on using the known stray light level from the same month in the previous year, when the Earth–Sun–spacecraft geometries had been similar. We propose a new method to predict stray-light contamination. The Kullback–Leibler similarity metric is used as a method to combine data from multiple years with appropriate adjustments for degradation and geometry drifts in order to calculate a fused stray-light contamination correction. The new method provides an improved prediction of stray-light contamination compared to the existing methods and may be considered for future use in the real-time NASA Level-1B products.

Citation Download Citation

Hongda Chen, Xiaoxiong Xiong, Xu Geng, and Kevin A. Twedt "Stray-light correction and prediction for Suomi National Polar-orbiting Partnership visible infrared imaging radiometer suite day-night band," Journal of Applied Remote Sensing 13(2), 024521 (29 May 2019). https://doi.org/10.1117/1.JRS.13.024521

Received: 9 November 2018; Accepted: 10 May 2019; Published: 29 May 2019

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