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Proceedings Paper

Evaluation of NOAA-20 VIIRS reflective solar bands calibration performance using vicarious approaches
Author(s): A. Wu; K. Chiang; N. Lei; X. Xiong
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Paper Abstract

The newly launched polar-orbiting NOAA-20 satellite is the follow-on mission to the SNPP (Suomi National Polar-orbiting Partnership) satellite. Both satellites are in an afternoon orbit with a close equatorial cross time. The Visible Infrared Imaging Radiometer Suite (VIIRS) is a key sensor onboard NOAA-20 and SNPP. The two VIIRS sensors are within the same engineering design with nearly identical spectral ranges. Its on-board calibration components include a solar diffuser and a solar diffuser stability monitor for the reflective solar bands (RSB), a V-groove blackbody for the thermal emissive bands (TEB), and a space view as background reference. This study evaluates calibration performance of the NOAA-20 VIIRS RSB using the first internally released L1B data product by NASA Land SIPS, which has consistent calibration coefficient look up tables (LUT) throughout the entire mission. Several independent vicarious approaches are used to examine the stability and consistence of reflectance. The first approach is based on a double difference method by comparison with SNPP VIIRS using observations from simultaneous nadir overpasses (SNO) with Aqua MODIS. The second is based on the reflectance trends from 16-day repeatable orbits obtained over the widely used Liby-4 desert site so each data point has the nearly same viewing angles relative to the site. The third approach is to use the frequent overpasses over the Dome C snow site. Results of this study provide NOAA-20 VIIRS post-launch calibration stability performance and radiometric agreement with SNPP for the first 18 months of mission.

Paper Details

Date Published: 10 October 2019
PDF: 11 pages
Proc. SPIE 11151, Sensors, Systems, and Next-Generation Satellites XXIII, 1115125 (10 October 2019); doi: 10.1117/12.2532573
Show Author Affiliations
A. Wu, Science Systems and Applications, Inc. (United States)
K. Chiang, Science Systems and Applications, Inc. (United States)
N. Lei, Science Systems and Applications, Inc. (United States)
X. Xiong, NASA Goddard Space Flight Ctr. (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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