Optical Environment in Gemini Space Flights

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Science  25 Aug 1967:
Vol. 157, Issue 3791, pp. 917-919
DOI: 10.1126/science.157.3791.917


The optical environment of spacecraft is discussed in terms of sky luminance, spacecraft corona, spacecraft scattered light, and glare sources. Rocket data show that sky luminance is not normally a significant factor; that spacecraft corona may be important at times; and that scattering from spacecraft protrusions and glare sources may be very significant. The range of effects for the scattered light sources is very broad and will depend on spacecraft geometry. An alternative approach in terms of primary sources is used to emphasize the overriding importance of sunlight scattered directly or indirectly.