| 基于多接收机模糊度关联的动态PPP快速重新收敛方法 |
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| 引用本文： | 宋超,郝金明.基于多接收机模糊度关联的动态PPP快速重新收敛方法[J].武汉大学学报(信息科学版),2017,42(5):595. |
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| 作者姓名： | 宋超 郝金明 |
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| 作者单位： | 1.信息工程大学导航与空天目标工程学院, 河南 郑州, 450001 |
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| 摘 要： | 针对由于遮挡等原因造成卫星信号中断后精密单点定位（precise point positioning，PPP）需要重新收敛的问题，提出了一种基于多接收机模糊度关联的动态PPP快速重新收敛方法。以远海地区精密定位为背景，充分利用了远海地区实践应用中经常在测量船的不同位置上架设多台接收机的基本特点，建立不同接收机的模糊度之间的关系，获取发生数据中断的接收机的先验模糊度，进而完成动态PPP的快速重新收敛。实验结果表明，附加基线长度约束的两个接收机单历元固定双差模糊度的成功率在99%以上；在单历元固定双差模糊度的情况下，无论数据中断多长时间，所提算法都可以单历元完成动态PPP的重新收敛，并且收敛后的定位精度同数据中断前的定位精度相同。
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| 关 键 词： | 动态PPP 重新收敛 双差模糊度 基线长度约束 先验模糊度 |
| 收稿时间： | 2015-03-18 |
Instantaneous Re-convergence of Kinematic PPP by the Use of Relationship Between Multiple Receiver Ambiguity |
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| Affiliation: | 1.Institute of Navigation and Aerospace, Information Engineering University, Zhengzhou 450001, China |
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| Abstract: | This paper proposes a new method based on relationship of multiple receiver ambiguity to solve the re-convergence problem in kinematic PPP due to the satellite signals interruption. The method makes full use of multiple receivers located in different locations of the survey vessel. Because of the different locations, the signal interruption may be not simultaneous for different receivers. The method establishes the relationships of ambiguity between different receivers and then obtains the priori ambiguity of the receiver that need re-convergence, and then completes the re-convergence of kinematic PPP. Experiments show that the success rate when fixing double-differenced ambiguity with baseline length constraint is more than 99%; when fixing double-differenced ambiguity, no matter how long the satellite signal is interrupted, the proposed method can complete re-convergence of kinematic PPP in one epoch. Moreover, the positioning accuracy after re-convergence is as same as the before. |
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