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Calibration Improvements in the Detector-to-Detector Differences for the MODIS Ocean Color BandsThe Moderate Resolution Imaging Spectroradiometer (MODIS), a major instrument within NASAs Earth Observation System missions, has operated for over 16 and 14 years onboard the Terra and Aqua satellites, respectively. Its reflective solar bands (RSB) covering a spectral range from 0.4 to 2.1 micrometers are primarily calibrated using the on-board solar diffuser(SD), with its on-orbit degradation monitored using the Solar Diffuser Stability Monitor. RSB calibrations are supplemented by near-monthly lunar measurements acquired from the instruments space-view port. Nine bands (bands 8-16) in the visible to near infrared spectral range from 0.412 to 0.866 micrometers are primarily used for ocean color observations.During a recent reprocessing of ocean color products, performed by the NASA Ocean Biology Processing Group, detector-to-detector differences of up to 1.5% were observed in bands 13-16 of Terra MODIS. This paper provides an overview of the current approach to characterize the MODIS detector-to-detector differences. An alternative methodology was developed to mitigate the observed impacts for bands 13-16. The results indicated an improvement in the detector residuals and in turn are expected to improve the MODIS ocean color products. This paper also discusses the limitations,subsequent enhancements, and the improvements planned for future MODIS calibration collections.
Document ID
20170003532
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Li, Yonghong
(Science Systems and Applications, Inc. Greenbelt, MD, United States)
Angal, Amit
(Science Systems and Applications, Inc. Greenbelt, MD, United States)
Wu, Aisheng
(Science Systems and Applications, Inc. Greenbelt, MD, United States)
Geng, Xu
(Science Systems and Applications, Inc. Greenbelt, MD, United States)
Link, Daniel
(Science Systems and Applications, Inc. Greenbelt, MD, United States)
Xiong, Xiaoxiong
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Date Acquired
April 17, 2017
Publication Date
August 28, 2016
Publication Information
Publication: Proceedings of Society of Photo-Optical Instrumentation Engineers (SPIE)
Volume: 9972
ISSN: 0277-786X
Subject Category
Earth Resources And Remote Sensing
Report/Patent Number
GSFC-E-DAA-TN41672
Meeting Information
Earth Observing Systems Conference(San Diego, CA)
Distribution Limits
Public
Copyright
Other
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