Restoration of degraded Suomi-NPP VIIRS DNB nighttime imagery induced by electronic bias change

Yalong Gu; Slawomir Blonski; Xi Shao; Sirish Uprety; Changyong Cao

doi:10.1117/12.2593739

1 August 2021 Restoration of degraded Suomi-NPP VIIRS DNB nighttime imagery induced by electronic bias change

Yalong Gu, Slawomir Blonski, Xi Shao, Sirish Uprety, Changyong Cao

Proceedings Volume 11829, Earth Observing Systems XXVI; 118290V (2021) https://doi.org/10.1117/12.2593739
Event: SPIE Optical Engineering + Applications, 2021, San Diego, California, United States

Abstract

Increased striping was observed in Suomi-NPP VIIRS DNB nighttime imagery after a flight software update on January 8, 2020. It occurred after an onboard computer reboot, resulting in a sudden change in the HGS dark offset. The sudden change made the HGS DN0 (dark offset) LUT outdated, eventually degrading the nighttime imagery. Analysis of the DNB monthly calibration data collected before and after the flight software update indicated that the sudden change in the HGS dark offset was induced by an unexpected change of the HGS electronic bias after an onboard computer reboot during the flight software update. An algorithm capable of correcting the sudden change while also eliminating star light contamination has been adopted for determining the DN0 LUT since the DNB monthly calibration starting in late January 2020. Nighttime image quality affected by the electronic bias change has been restored after the LUT update.

Conference Presentation

Citation Download Citation

Yalong Gu, Slawomir Blonski, Xi Shao, Sirish Uprety, and Changyong Cao "Restoration of degraded Suomi-NPP VIIRS DNB nighttime imagery induced by electronic bias change", Proc. SPIE 11829, Earth Observing Systems XXVI, 118290V (1 August 2021); https://doi.org/10.1117/12.2593739

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