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Error Budget for a Calibration Demonstration System for the Reflected Solar Instrument for the Climate Absolute Radiance and Refractivity ObservatoryA goal of the Climate Absolute Radiance and Refractivity Observatory (CLARREO) mission is to observe highaccuracy, long-term climate change trends over decadal time scales. The key to such a goal is to improving the accuracy of SI traceable absolute calibration across infrared and reflected solar wavelengths allowing climate change to be separated from the limit of natural variability. The advances required to reach on-orbit absolute accuracy to allow climate change observations to survive data gaps exist at NIST in the laboratory, but still need demonstration that the advances can move successfully from to NASA and/or instrument vendor capabilities for spaceborne instruments. The current work describes the radiometric calibration error budget for the Solar, Lunar for Absolute Reflectance Imaging Spectroradiometer (SOLARIS) which is the calibration demonstration system (CDS) for the reflected solar portion of CLARREO. The goal of the CDS is to allow the 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. The resulting SI-traceable error budget for reflectance retrieval using solar irradiance as a reference and methods for laboratory-based, absolute calibration suitable for climatequality data collections is given. Key components in the error budget are geometry differences between the solar and earth views, knowledge of attenuator behavior when viewing the sun, and sensor behavior such as detector linearity and noise behavior. Methods for demonstrating this error budget are also presented.
Document ID
20150023302
Document Type
Conference Paper
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
December 18, 2015
Publication Date
September 23, 2013
Publication Information
Publication: SPIE Proceedings, Imaging Spectrometry XVIII, 887008
Volume: 8870
Subject Category
Geosciences (General)
Report/Patent Number
GSFC-E-DAA-TN26284
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Keywords
radiometric calibration
CLARREO
Preflight calibration

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