北斗三频无几何相位组合周跳探测与修复

推导了Compass三频无几何组合周跳探测的理论模型，并分析了探测精度。通过多频组合理论构造了较优的无几何周跳探测检验量，并对存在的不敏感周跳组合进行了分析。为了保证探测的完备性，联合运用两个合适的无几何组合作为探测检验组合进行周跳探测，并筛选了较优的探测检验组合。针对无几何组合最多只能两个线性无关，无法修复三个频点上的周跳的问题，探索了无几何探测检验组合联合一个伪距/载波组合进行周跳修复的方法。最后利用Compass三频实测数据,选用了无几何探测检验组合(-1,-1,2)与(-1,2,-1)和伪距/载波组合(1,3,-4)进行了验证分析。试验表明，该方法能够探测出所有大小的周跳，并且可以单历元修复周跳值，可适用于动态导航定位，有一定的实用性。

BeiDou Triple-frequency Geometry-Free Phase Combination for Cycle-slip Detection and Correction

The theory model of Compass triple-frequency geometry-free combination used for cycle-slip detection is deduced, and the detection accuracy is analyzed. Based on the theory of multi-frequency combination, some optimal geometry-free combinations for detecting cycle-slip have been constructed, the insensitive cycle-slip groups of the detection observables have been analyzed. In order to detect all the cycle-slips, two proper geometry-free combinations are simultaneously used to be as the detection observable combination, the better detection observable combinations have been selected. Because the cycle-slips on the three frequencies observations cannot be determined by two linear independence geometry-free combinations, the method of cycle-slip correction by geometry-free detection observable combination and one combination of pseudo range and carrier phase observations has been explored. Using the real Compass triple-frequency data, finally several experiments have been made to test the effect of using (-1,-1,2) ,(-1,2,-1) geometry-free combinations and the (1,3,-4) combination of pseudo range and carrier phase observations. Experiment results show that this method is effective，practical and can be used to the kinematic navigation positioning which can detect all the cycle-slips, no matter the small one or the big, and can correct the cycle-slip based on single epoch.