title: Optical Environment about the OGO-III Satellite.
abstract: 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.
authors.forename: C
authors.initials: C
authors.lastname: Wolff