Excerpt from Space Simulation: Proceedings of a Conference Held at Nbs Gaithersburg, Maryland, September 14-16, 1970 If the mass accretion upon an optically transmissive surface is sufficient, it can reduce optical and near infrared transmittance to 18 um region) This may result in the degradation of the output of solar-cell arrays, the loss of sensitivity of optical experiments or sensors, or the Toss of vision, as in the case of the Gemini 11 where severe clouding of the spacecraft Window occurred (2) About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.