Estimation of the end-of-life optical properties of Z-93 thermal control coating for the Space Station FreedomThis paper describes an approach to estimating the 30-year end-of-life optical properties of Z-93 white, thermal control coating on the Space Station Freedom. Estimations of the 30-year end-of-life properties of thermal control coatings are necessary for sizing the thermal radiators. The available flight and ground data and computer generated contamination models are used to predict the effects of ground handling, exposure to UV radiation, and on-orbit contamination on the optical properties of Z-93. The solar absorptance for portions of the thermal control system radiator surfaces is predicted to change from 0.15 to 0.36 after 30 years of low earth orbit environmental exposure. The infrared emittance is predicted to change from 0.92 to 0.90.
Document ID
19920048673
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hasegawa, Mark M. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Babel, Hank W. (McDonnell Douglas Space Systems Co. Huntington Beach, CA, United States)