Influence Of Sky Background Light For Floor Space Laser Communication System Performance

Sky background light is produced by scattering and refraction of the sun light from atmosphere. For ground space laser communication systems, the noise caused by the sky background light cannot be underestimated. Because of the capture/coarse tracking link and larger field of view of communication link, integration time is longer, by the interference of sky background light is most serious.This paper according to the sky background light source, emphatically analyzed the parameter characteristics and trends. And use the sun radiometer CE318 observed the sky background radiation intensity. Then according to the working principle of space laser communication system and the characteristics of the capture / coarse tracking link and the communication link, and also on the basis of the actual data,I analyz the sky background light space laser measured communication system.At last I put forward the effective measures to improve sky background light.