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Proceedings Paper

Using the moon and stars for VIIRS day/night band on-orbit calibration
Author(s): Xiaoxiong Xiong; Truman Wilson; Amit Angal; Junqiang Sun
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Paper Abstract

Two VIIRS instruments are currently operated in space; one on-board the S-NPP satellite launched in October, 2011 and another on-board the NOAA-20 satellite launched in November, 2017. The VIIRS design has included a unique day/night band (DNB), which can make both daytime and nighttime observations in the reflective solar spectral region. It has a broad spectral response, covering wavelengths from 500 to 900 nm, and an extremely large dynamic range. The DNB collects data in three gain stages: LGS, MGS, and HGS for low, mid, and high gain stage, respectively. Its HGS has excellent low-light sensitivity and is capable of detecting bright stars through the instrument space view port. Similar to other reflective solar bands (RSB), the DNB LGS and MGS responses to the Moon can be used to monitor their on-orbit calibration stability. This paper describes various strategies that we have developed to use the moon and stars for the DNB on-orbit calibration and calibration inter-comparisons and presents the results for the S-NPP and NOAA-20 VIIRS. Key technical issues, such as identifying the stars and processing data collected at different gain stages and aggregation modes, are also discussed, along with the efforts planned for future improvements.

Paper Details

Date Published: 10 October 2019
PDF: 10 pages
Proc. SPIE 11151, Sensors, Systems, and Next-Generation Satellites XXIII, 111511Q (10 October 2019); doi: 10.1117/12.2532977
Show Author Affiliations
Xiaoxiong Xiong, NASA Goddard Space Flight Ctr. (United States)
Truman Wilson, Science Systems and Applications, Inc. (United States)
Amit Angal, Science Systems and Applications, Inc. (United States)
Junqiang Sun, Science Systems and Applications, Inc. (United States)

Published in SPIE Proceedings Vol. 11151:
Sensors, Systems, and Next-Generation Satellites XXIII
Steven P. Neeck; Philippe Martimort; Toshiyoshi Kimura, Editor(s)

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