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

Xiaoxiong Xiong; Ashish Shrestha; Brian Wenny

doi:10.1117/12.2519000

14 May 2019 Assessments of MODIS thermal emissive bands on-orbit calibration performance using Dome C observations

Xiaoxiong Xiong, Ashish Shrestha, Brian Wenny

Proceedings Volume 10986, Algorithms, Technologies, and Applications for Multispectral and Hyperspectral Imagery XXV; 1098605 (2019) https://doi.org/10.1117/12.2519000
Event: SPIE Defense + Commercial Sensing, 2019, Baltimore, MD, United States

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.

Conference Presentation

Citation Download Citation

Xiaoxiong Xiong, Ashish Shrestha, and Brian Wenny "Assessments of MODIS thermal emissive bands on-orbit calibration performance using Dome C observations", Proc. SPIE 10986, Algorithms, Technologies, and Applications for Multispectral and Hyperspectral Imagery XXV, 1098605 (14 May 2019); https://doi.org/10.1117/12.2519000

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