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In page CLARREO:

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CLARREO could make highly accurate decadal change observations that are traceable to International Systems of Units (SI) standards. For example, at solar wavelengths this is intended to be confirmed after launch using comparison of actual data to theoretical simulations of lunar/solar radiance generated within a high-fidelity sensor model,[1] although it is unclear how such a non-experimental approach will ensure SI traceability.[citation needed] The Earth observations then made by CLARREO have sensitivity to the most critical but least understood climate radiative forcings, responses, and feedbacks, such as: