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Proceedings Paper

Theoretical sensitivity of CERES measured radiances to uncertainties in calibration sources and the spectral response of the instrument
Author(s): Ira J. Sorensen; Maria Cristina Sanchez; Kory J. Priestley; J. Robert Mahan
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Paper Abstract

The objective of the current research is to study the theoretical uncertainty of the CERES ERBE-like level 1 and level 2 instantaneous filtered and unfiltered radiance data products. The instrument views incident radiation from an Earth scene, which is then focused on a blackened thermistor bolometer, where it is converted to an electrical output. The measured digital counts are converted to a filtered radiance by means of instrument calibration coefficients. The filtered radiance is then converted to an unfiltered radiance with an algorithm that utilizes the instrument's spectral response function. Uncertainties in the calibration sources and the spectral response function of the instrument can negatively affect the quality of the final data products. A statistical study of the data products' sensitivity to various instrument and calibration parameters is performed using high-fidelity first-principle numerical models of the CERES instrument. Once the key parameters are identified, fidelity intervals of the data products are calculated using nominal parameter values and uncertainty distributions.

Paper Details

Date Published: 18 January 2002
PDF: 11 pages
Proc. SPIE 4483, Earth Observing Systems VI, (18 January 2002); doi: 10.1117/12.453472
Show Author Affiliations
Ira J. Sorensen, NASA Langley Research Ctr. (United States)
Maria Cristina Sanchez, Virginia Polytechnic Institute and State Univ. (United States)
Kory J. Priestley, NASA Langley Research Ctr. (United States)
J. Robert Mahan, Virginia Polytechnic Institute and State Univ. (United States)

Published in SPIE Proceedings Vol. 4483:
Earth Observing Systems VI
William L. Barnes, Editor(s)

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