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An Early Assessment of JPSS-1/NOAA-20 VIIRS Day-Night Band On-Orbit Calibration and PerformanceThe JPSS-1 (now named NOAA-20) VIIRS instrument has been successfully operating on orbit since November 28th, 2017. The Day-Night Band (DNB) is a panchromatic channel covering wavelengths from 0.5 to 0.9 m that is capable of observing the Earth scene in visible/near-Infrared spectral range at spatial resolution of 750 m. The DNB operates at low, mid, or high radiometric gain stages, and it uses an onboard solar diffuser (SD) panel for low gain stage calibration. The SD observations also provide a mean to compute gain ratios between low-to-mid and mid-to-high gain stages. With their large dynamic range and high sensitivity, the DNB detectors can make observations during both daytime and nighttime. This paper provides an early assessment of the DNB on-orbit performance and behavior in the first 90-day post launch test (PLT) period and beyond. The calibration methodology used by the VIIRS Characterization Support Team (VCST) in support of the NASA earth science community will be presented. The trending of OBC dark-offsets, SD gains and gain ratios, and signal-to-noise ratio (SNR) at minimum radiance have been analyzed, especially during key events such as the Nadir and Cryo-cooler doors opening. Furthermore, we performed inter-comparison studies between SNPP and JPSS-1 instruments and evaluated DNB radiometric calibration and characterization, including the SD degradation, detector gains and gain ratios, as well as the calibration comparison between the IDPS LUTs and our VCST delivery results.
Document ID
20190000658
Document Type
Conference Paper
Authors
Chen, H. (Science Systems and Applications, Inc. Lanham, MD, United States)
Oudrari, H. (Science Systems and Applications, Inc. Lanham, MD, United States)
Sun, C. (Global Science and Technology, Inc. Greenbelt, MD, United States)
Schwarting, T. (Science Systems and Applications, Inc. Lanham, MD, United States)
Xiong, X. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
February 12, 2019
Publication Date
September 10, 2018
Subject Category
Earth Resources and Remote Sensing
Report/Patent Number
GSFC-E-DAA-TN64671
Meeting Information
SPIE Remote Sensing(Berlin)
Funding Number(s)
CONTRACT_GRANT: NNG15HQ01C
Distribution Limits
Public
Copyright
Public Use Permitted.

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