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Proceedings Paper

Assessments of MODIS thermal emissive bands on-orbit calibration performance using Dome C observations
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Paper Abstract

MODIS (MODerate Resolution Imaging Spectroradiometer) instruments are key contributors to the NASA’s Earth Observing System (EOS) Terra and Aqua missions. Launched in December 1999 and May 2002, Terra and Aqua MODIS have successfully operated for more than 19 and 17 years, respectively. MODIS has 36 spectral bands covering wavelengths from visible (VIS) to long-wave infrared (LWIR). Observations from both Terra and Aqua MODIS instruments have been used to generate a wide range of data products that have enabled many studies of the Earth’s atmosphere, land, and oceans. Sixteen of the 36 MODIS spectral bands, with wavelengths ranging from 3.7 μm to 14.4 μm, are referred to as the Thermal Emissive Bands (TEBs). Key calibration parameters that are related to detector gains of the MODIS TEBs are calibrated on a scan-by-scan basis using an on-board blackbody. As both sensors continue to operate beyond their specified design lifetime of 6 years, it has become increasingly important to constantly monitor and evaluate the on-orbit performance and calibration consistency of their long-term data records. In this study, we examine the long-term calibration stability of each sensor and the calibration consistency between two MODIS instruments using multiple daily (nadir) observations over Dome Concordia. The near-surface temperature measurements from an Automatic Weather Station (AWS) are used as a proxy reference to help determine the calibration stability and relative bias between the Terra and Aqua MODIS TEBs.

Paper Details

Date Published: 14 May 2019
PDF: 11 pages
Proc. SPIE 10986, Algorithms, Technologies, and Applications for Multispectral and Hyperspectral Imagery XXV, 1098605 (14 May 2019); doi: 10.1117/12.2519000
Show Author Affiliations
Xiaoxiong Xiong, NASA Goddard Space Flight Ctr. (United States)
Ashish Shrestha, Science Systems and Applications, Inc. (United States)
Brian Wenny, Science Systems and Applications, Inc. (United States)

Published in SPIE Proceedings Vol. 10986:
Algorithms, Technologies, and Applications for Multispectral and Hyperspectral Imagery XXV
Miguel Velez-Reyes; David W. Messinger, Editor(s)

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