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Proceedings Paper

Electronic crosstalk characterization and correction for MODIS bands 1 and 2 using lunar observations
Author(s): Truman Wilson; Xiaoxiong Xiong
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Paper Abstract

Electronic crosstalk is an issue that has affected several bands on the MODIS instruments on board the Terra and Aqua platforms. For bands 1 and 2 in MODIS, electronic crosstalk signal contamination is observed at relatively consistent levels throughout the entire mission for each instrument. As in many previous efforts, including the correction of electronic crosstalk in Terra MODIS bands 27 − 30 in Collection 6.1, regularly scheduled lunar observations are used in order to identify the source of the crosstalk contamination as well as derive the correction coefficients throughout the mission. For each detector in bands 1 and 2, the source of the contamination follows a pattern determined by the band and detector being sampled from bands 13−19 at approximately the same time. These bands are on the same focal plane assembly but are sampled on a different electronic output than bands 1 and 2. The contamination was found to be non-linear as a function of the sending signal and will be shown to occur before the analog-to-digital conversion of the signal. In this work, we will derive quadratic crosstalk correction coefficients for bands 1 and 2 in both Aqua and Terra MODIS. The correction will be applied to the lunar and solar diffuser calibration data and then applied to the Earth-view imagery. While the correction to the lunar data shows an improvement to the calibration and spatial characterization results, the solar diffuser and Earth-view data corrections are complicated by signal saturation in the sending bands.

Paper Details

Date Published: 9 September 2019
PDF: 12 pages
Proc. SPIE 11127, Earth Observing Systems XXIV, 111271X (9 September 2019); doi: 10.1117/12.2527893
Show Author Affiliations
Truman Wilson, Science Systems and Applications, Inc. (United States)
Xiaoxiong Xiong, NASA Goddard Space Flight Ctr. (United States)

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

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