Abstract
Thermal control coatings on spacecraft will be increasingly important as spacecraft grow smaller and more compact. New thermal control coatings will be needed to meet the demanding requirements of next generation spacecraft. Computer programs are now available to design optical coatings, and one such program was used to design several thermal control coatings consisting of alternating layers of WO3 and SiO2. The coatings were subsequently manufactured with electron beam evaporation and characterized with both optical and thermal techniques. Optical data were collected in both the visible region of the spectrum and the infrared. Solar absorptance values were predicted in the range of 0.177–0.196 and were observed in the range of 0.155–0.228. Infrared emittance values were predicted in the range of 0.074–0.083 and were observed optically in the range 0.048–0.093 and calorimetrically in the range of 0.069–0.100.
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