【作者】 温亚鑫； 戴吾蛟；

【Author】 Yaxin Wen;Wujiao Dai;Department of Survey Engineering and Geomatics, Central South University;

【机构】 中南大学地球科学与信息物理学院；

【摘要】 为了弥补当前已有单历元模糊度解算算法只适用于短基线的不足,提出一种利用GPS双频观测值实现长基线下单历元模糊度固定的算法。首先,利用电离层约束法得到双差模糊度之间的线性约束条件;其次,利用变形监测中监测站点坐标近似已知的条件进行约束获得近似模糊度;最后,根据监测站点的最大变形给出搜索空间,搜索固定模糊度。试验结果表明:该方法可以在长基线也实现单历元的模糊度固定,对于实时的变形监测具有一定的参考价值。更多还原

【Abstract】 To compensate for the current lack of existing single-epoch algorithm to resolve ambiguity is only suitable for short baseline, proposed a algorithm with dual-frequency GPS observations to achieve medium and long baseline single-epoch ambiguity fixing. First, we use the ionosphere constraint method to obtain the linear constraints between the double-difference ambiguities. Second, the approximate ambiguities are obtained by using the known conditions of monitoring station coordinates in deformation monitoring. Finally, the search space is given according to the deformation characteristics of the monitoring stations, and the fixed ambiguities are searched. The experimental results show that this method can fix the ambiguity of single epoch at long baseline, which is of certain reference value for real-time deformation monitoring.更多还原