Cycle-slip automatic detection and processing strategy for dynamic PPP
Cycle-slip automatic detection and processing strategy for dynamic PPP
复制标题
动态PPP的周跳自动检测及处理策略
DOI：
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发表时间：
2014
期刊：
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通讯作者：
Zhang Bao-Cheng
中科院分区：
文献类型：
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作者：
Chai Yan-Ju;Yang Ren-Gui;Zhang Bao-Cheng
周跳的自动检测和精确估计是动态PPP中的一个关键而又困难的问题。本文提出了一种利用L1、L2、L4、L5和多普勒观测值对周跳进行检测和定位的新方法。如果周跳被准确检测到，则对应的卫星被视为一颗新的上升卫星，这种处理策略的优点是：当卫星数不少于4颗时，动态PPP精度稳定，舰载实验结果表明，在强动态环境条件下，以双差基线长度为基准，动态PPP的定位精度可达0.1~ 0.2m。
Cycle-slip Automatic detection and accurate estimation is a key but difficult problem in dynamic PPP.A new method for detecting and locating the cycle-slip is presented by utilizing the L1,L2,L4,L5and Doppler observations.If the cycle slip is detected accurately,the corresponding satellite is treated as a new rising satellite,so its ambiguities must be re-initialized.The advantage of the processing strategy is that dynamic PPP precision is stable if the number of the satellites is no less than four,because integer slip cycles needn't be calculated and repaired which is very difficult in dynamic PPP.The shipborne experimental results show that dynamic PPP precision reaches 0.1~0.2meters by taking the double difference baseline length as a reference on the heavy dynamic environment condition.