关键词: 航空、航天科学技术, 星地激光通信, 斜程大气信道, 云层, STK, 可通率

Abstract: The Accessible time and elevation angle of satellite-to-ground link were simulated by using STK program. The effects of atmospheric transmittance, cirrocumulus, intensity scintillation and angle-of-arrival fluctuation were analyzed for different paths from two GEO satellites to three ground stations. Under the visibility of 5 km in city aerosol, weak turbulence and clouds, an adaptive optimal threshold method was proposed to establish the model of communicable probability of the link. The simulation results show that the average available probability of GEO in longitude 75° to Hainan ground station is best, the communicable probability attained near 93% in clear day and 66.7% in cirrocumulus cover day. The analysis on this paper will be helpful for experiments of satellite-to-ground laser communication.

Key words: aeronautic and astronautic technology, satellite-to-ground laser communication, slant path atmospheric turbulence, clouds, satellite-tool-kit, available probability