An Approach-Search Algorithm Used in GPS Single Frequency Kinematic Relative Positioning
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摘要: 针对目前实时动态定位(RTK)中常用搜索解法可靠度不高的缺点,利用各历元诸双差方程所形成的法方程,对其进行解耦处理以便于实时计算.在此基础上综合了逼近、搜索两种解法各自的局部优势,构成了逼近/搜索的联合解法.实际测试表明,该算法在单频全球定位系统(GPS)载波相位差分的动态相对定位过程中,用2~3min的时间即可可靠地在航解算出整周模糊度.Abstract: To compensate the low reliability of normal search algorithm of Real Time Kinematic positioning(RTK) technology, an approach-search algorithm is proposed. This algorithm is based on a set of double difference equation of each epoch. By decomposing these equations, this real-time algorithm can integrate the merits of approaching and searching methods, and so can be used to solve the problem of ambiguity resolution in difference kinematic relative positioning with GPS single frequency carrier phase. Real test shows that the ambiguity can be accurately determined in 2~3 minutes with the present algorithm.
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Key words:
- satellite navigation /
- relative measurement /
- quick astrofix /
- real time kinematics (RTK)
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