Theoretical sensitivity of CERES measured radiances to uncertainties in calibration sources and the spectral response of the instrument

Ira J. Sorensen; Maria Cristina Sanchez; Kory J. Priestley; J. Robert Mahan

doi:10.1117/12.453472

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18 January 2002 Theoretical sensitivity of CERES measured radiances to uncertainties in calibration sources and the spectral response of the instrument

Ira J. Sorensen, Maria Cristina Sanchez, Kory J. Priestley, J. Robert Mahan

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Proceedings Volume 4483, Earth Observing Systems VI; (2002) https://doi.org/10.1117/12.453472
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

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.

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Ira J. Sorensen, Maria Cristina Sanchez, Kory J. Priestley, and J. Robert Mahan "Theoretical sensitivity of CERES measured radiances to uncertainties in calibration sources and the spectral response of the instrument", Proc. SPIE 4483, Earth Observing Systems VI, (18 January 2002); https://doi.org/10.1117/12.453472

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