现代飞行器运动特性复杂，其姿态变化引起的天线对空覆盖特性改变，使得天线前端接收的信号增益变化。传统GPS信号仿真，在处理其信号增益上没有考虑上述影响。为此，综合天线波瓣图、坐标系转换以及飞行器的姿态，导出GPS信号增益模型，实现飞行器姿态在GPS信号仿真上的体现，对于深化卫星信号仿真技术具有工程上的指导意义。

Motion features of the modern aircraft are becoming much more complex.The change of antenna coverage properties caused by the change of aircraft attitude may result the change of signal gain in the antenna frontend.The traditional method of GPS signal simulation did not take the above effects into consideration.In order to reflect the influence of carrier attitude on GPS signal,the antenna lobe pattern, coordinate system transformation and aircraft attitude were integrated together to deduce the model of GPS signal gain.This study can provide a reference for the engineering application of satellite signal simulation.