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Solar absorptance and thermal emittance of some common spacecraft thermal-control coatings

Solar absorptance and thermal emittance of spacecraft materials are critical parameters in determining spacecraft temperature control. Because thickness, surface preparation, coatings formulation, manufacturing techniques, etc. affect these parameters, it is usually necessary to measure the absorptance and emittance of materials before they are used. Also, because most materials exhibit some amount of degradation due to outgassing, ultraviolet, and or particle damage, it is necessary to conduct laboratory testing on these materials before certifying them for use in space. This document contains absorptance and emittance data for many common types of thermal control coatings, together with some sample spectral data curves of absorptance. In cases for which ultraviolet and particle radiation data are available, the degraded absorptance and emittance values are also listed.

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