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为了分析太阳辐射对卫星光通信系统造成的影响,利用太阳常数和微元法计算了辐照到目标物体表面的太阳辐射功率。结合地面通信终端的接收信号功率,分析了在太阳辐射影响下的系统信噪比和误码率,并给出了满足系统误码率10-9条件下,发射信号功率、俯仰角以及跟瞄误差之间的关系。结果表明对日俯仰角需要被限制在一个很小的变化范围,而增大信号发射功率和减小系统跟瞄误差都是提高卫星光通信系统可靠性的有效途径。
In order to analyze the influence of solar radiation on the satellite optical communication system, the solar radiation power irradiated to the surface of the target object is calculated by the solar constant and the micro-element method. Combined with the received signal power of terrestrial communication terminal, the signal to noise ratio and bit error rate of the system under the influence of solar radiation are analyzed. The power, pitch angle and aiming of transmitting signal are given under the condition of meeting the system error rate of 10-9. The relationship between errors. The results show that the pitch angle needs to be limited to a small range, and increasing the signal transmission power and reducing the tracking error are all effective ways to improve the reliability of satellite optical communication system.