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Demonstrating the Error Budget for the Climate Absolute Radiance and Refractivity Observatory Through Solar Irradiance MeasurementsThe Climate Absolute Radiance and Refractivity Observatory (CLARREO) mission addresses the need to observe highaccuracy, long-term climate change trends and to use decadal change observations as a method to determine the accuracy of climate change. A CLARREO objective is to improve the accuracy of SI-traceable, absolute calibration at infrared and reflected solar wavelengths to reach on-orbit accuracies required to allow climate change observations to survive data gaps and observe climate change at the limit of natural variability. Such an effort will also demonstrate National Institute of Standards and Technology (NIST) approaches for use in future spaceborne instruments. The current work describes the results of laboratory and field measurements with the Solar, Lunar for Absolute Reflectance Imaging Spectroradiometer (SOLARIS) which is the calibration demonstration system (CDS) for the reflected solar portion of CLARREO. SOLARIS allows testing and evaluation of calibration approaches, alternate design and/or implementation approaches and components for the CLARREO mission. SOLARIS also provides a test-bed for detector technologies, non-linearity determination and uncertainties, and application of future technology developments and suggested spacecraft instrument design modifications. Results of laboratory calibration measurements are provided to demonstrate key assumptions about instrument behavior that are needed to achieve CLARREO's climate measurement requirements. Absolute radiometric response is determined using laser-based calibration sources and applied to direct solar views for comparison with accepted solar irradiance models to demonstrate accuracy values giving confidence in the error budget for the CLARREO reflectance retrieval.
Document ID
20160005178
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Thome, Kurtis
(NASA Goddard Space Flight Center Greenbelt, MD United States)
McCorkel, Joel
(NASA Goddard Space Flight Center Greenbelt, MD United States)
McAndrew, Brendan
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Date Acquired
April 19, 2016
Publication Date
January 1, 2016
Publication Information
Publication: Proceedings of SPIE
Publisher: SPIE
Volume: 9607
Subject Category
Instrumentation And Photography
Meteorology And Climatology
Report/Patent Number
GSFC-E-DAA-TN31283
Distribution Limits
Public
Copyright
Other
Keywords
CLARREO
radiometric calibration
preflight calibration

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