【摘 要】
：
导航卫星采用单自由度太阳帆板，通过动态偏航控制，保证发射天线指向地球的同时太阳帆板法向指向太阳。但动态偏航控制使得卫星发射天线绕卫星位置矢量转动，造成发射信号的相
【机 构】
：
北京卫星导航中心 北京 中国 100094
论文部分内容阅读
导航卫星采用单自由度太阳帆板，通过动态偏航控制，保证发射天线指向地球的同时太阳帆板法向指向太阳。但动态偏航控制使得卫星发射天线绕卫星位置矢量转动，造成发射信号的相位缠绕。特别是地影期间，卫星在正午和子夜时的偏航转动速率达到最大，相位缠绕影响最大。在精密定位时，需要考虑卫星发射天线的相位中心变化，卫星偏航姿态控制带来的相位缠绕问题也必须考虑。如果采用二自由度太阳帆板，卫星本体不需要进行动态偏航控制，只对帆板进行动态偏航控制，在惯性系内卫星发射天线相对于卫星位置矢量不发生转动，就可以减轻相位缠绕问题，用户也可以方便地补偿卫星发射信号的相位缠绕。
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