Optical Environment about the OGO-III Satellite

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Science  24 Nov 1967:
Vol. 158, Issue 3804, pp. 1045-1046
DOI: 10.1126/science.158.3804.1045


An upper limit to the brightness of the daytime sky near a large unmanned satellite has been obtained; it is some 30 times less than the darkest daytime sky yet reported by an astronaut. However, there still remains the danger that this background light (less than 5 x 10-13 as bright as the sun) will interfere with observations of the solar corona and zodiacal light.