Improved NOAA-20 Visible Infrared Imaging Radiometer Suite Day/Night Band Image Quality by Upgraded Gain Calibration

Due to complex radiometric calibration, the imagery collected by the Day/Night Band (DNB) of the Visible Infrared Imaging Radiometer Suite (VIIRS) onboard the Suomi National Polar Partnership (Suomi-NPP) and the NOAA-20 follow-on satellite is subject to artifacts such as striping, which eventually a...

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Published inRemote sensing (Basel, Switzerland) Vol. 13; no. 13; p. 2509
Main Authors Gu, Yalong, Blonski, Slawomir, Wang, Wenhui, Uprety, Sirish, Choi, Taeyoung, Shao, Xi, Zhang, Bin, Cao, Changyong
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.07.2021
Subjects
Calibration
detector nonlinearity
Diffusers
Flaw detection
High gain
Image quality
Imaging radiometers
Infrared imaging
Infrared radiometers
Light
Night
NOAA-20
Nonlinear systems
Prelaunch tests
radiometric calibration
Radiometry
regression analysis
Remote sensing
satellites
Sensors
striping
Systematic errors
VIIRS DNB
Online AccessGet full text
ISSN2072-4292
2072-4292
DOI10.3390/rs13132509

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Summary:Due to complex radiometric calibration, the imagery collected by the Day/Night Band (DNB) of the Visible Infrared Imaging Radiometer Suite (VIIRS) onboard the Suomi National Polar Partnership (Suomi-NPP) and the NOAA-20 follow-on satellite is subject to artifacts such as striping, which eventually affect Earth remote sensing applications. Through comprehensive analysis using the NOAA-20 VIIRS DNB prelaunch-test and on-orbit data, it is revealed that the striping results from flaws in the calibration process. In particular, a discrepancy between the low-gain stage (LGS) Earth view (EV) gain and the onboard calibrator solar diffuser view gain makes the operational LGS gain coefficients of a few aggregation modes and detectors biased. Detector nonlinearity at low radiance level also induces errors to the mid-gain stage (MGS) and high-gain stage (HGS) gain through the biased gain ratios. These systematic errors are corrected by scaling the operational LGS gains using the factors derived from the NOAA-20 VIIRS DNB prelaunch test data and by adopting linear regression for evaluating the gain ratios. Striping in the NOAA-20 VIIRS DNB imagery is visibly reduced after the upgraded gain calibration process was implemented in the operational calibration.
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ISSN:2072-4292
2072-4292
DOI:10.3390/rs13132509