摘要
讨论了利用 GPS载波相位信号测量载体姿态中出现的周跳问题及解决方法。首先根据静态情况下 GPS载波相位信号的特点提出了一种基于外推法的周跳检测和修复方法。在此基础上又用故障检测的原理提出了一种利用冗余双差载波相位观测量的周跳检测和修复方法 ,该方法可以应用于动态情况 ,其适用条件是要求相邻历元至少有 4颗卫星锁定 ,并且整周模糊度已经固定。文中利用实测数据对提出的方法进行了验证 ,结果表明两种周跳检测及修复方法是有效的 ,在 GPS姿态系统中 ,综合运用这两种方法可大大减少系统的初始化次数。
The cycle slip problem and its solving method in GPS-based attitude determination system is discussed. According to the characteristics of GPS carrier phase signals under static conditions, a recursive algorithm for detection and recovery of cycle slips is proposed. And then, based on the theory of fault detection, a detection and recovery algorithm for cycle slips by using redundant double difference as measurements is proposed and it can be used under static and kinematic conditions. But this algorithm can be used only when more than 4 satellites are locked and integer ambiguities are fixed. Experimental results show that these algorithms are efficient. The algorithms can rapidly reduce the initialization number in GPS attitude determination system.
出处
《数据采集与处理》
CSCD
2002年第1期50-53,共4页
Journal of Data Acquisition and Processing
