Share Email Print
cover

Proceedings Paper • new

NOAA-20 VIIRS initial on-orbit radiometric calibration using scheduled lunar observations
Author(s): Taeyoung Choi; Xi Shao; Slawomir Blonski; Wenhui Wang; Sirish Uprety; Changyong Cao
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

The scheduled lunar observations by the NOAA-20 VIIRS provide an independent source of calibration for the Reflective Solar Bands (RSB). Spacecraft roll maneuver is typically conducted to ensure that the moon observation is recorded at the Space View (SV) scan angle. VIIRS Earth View sector is shifted at the time of the lunar data collection to cover the SV scan angle and ensure spectral band co-registration. The lunar observation is performed monthly at nearly the same lunar phase angle with the exception of ~3-4 months each year. This paper analyzes scheduled lunar observations data from December 2017 to May 2019. For each lunar collection, the Global Space-based Inter-Calibration System (GSICS) Implementation of ROLO (GIRO) model is used to predict the expected lunar irradiance, and the ratio between the GIRO modeled and observed lunar irradiance is derived as the VIIRS lunar F-factor (or inverse of the gain factor). The lunar Ffactors are compared to the Solar Diffuser (SD) based F-factors that are used in the operational production of VIIRS Sensor Data Records (SDR) at NOAA. These two on-orbit calibration methods provide independent trending of the radiometric response degradations in the RSBs of VIIRS. In this paper, we present SD and lunar F-factor comparison results for NOAA-20 VIIRS RSBs.

Paper Details

Date Published: 9 September 2019
PDF: 11 pages
Proc. SPIE 11127, Earth Observing Systems XXIV, 111271Z (9 September 2019); doi: 10.1117/12.2528459
Show Author Affiliations
Taeyoung Choi, Global Science & Technology, Inc. (United States)
NOAA National Environmental Satellite, Data, and Information Service (United States)
Xi Shao, Univ. of Maryland, College Park (United States)
NOAA National Environmental Satellite, Data, and Information Service (United States)
Slawomir Blonski, Global Science & Technology, Inc. (United States)
NOAA National Environmental Satellite, Data, and Information Service (United States)
Wenhui Wang, Global Science & Technology, Inc. (United States)
NOAA National Environmental Satellite, Data, and Information Service (United States)
Sirish Uprety, Univ. of Maryland, College Park (United States)
NOAA National Environmental Satellite, Data, and Information Service (United States)
Changyong Cao, NOAA National Environmental Satellite, Data, and Information Service (United States)


Published in SPIE Proceedings Vol. 11127:
Earth Observing Systems XXIV
James J. Butler; Xiaoxiong (Jack) Xiong; Xingfa Gu, Editor(s)

© SPIE. Terms of Use
Back to Top