中文摘要：

阐述了GPS数据处理中基于Bootstrap的模糊度固定策略，在此基础上对二维法方程以及参数更新的算法进行改进，推导了更高效的三维法方程以及参数更新算法，能够提高解算速度，对GPS数据处理具有一定的参考价值。

英文摘要：

At first, this paper introduces the strategy of Bootstrap method of ambiguity-fixing in GPS precise positioning. And then, based on the this, the paper improves the algorithm which can update the two-dimensional normal equations and solution vector and develops a new algorithm which can efficiently update three-dimensional normal equations and solution vector. This algorithm can improve the calculation speed in integer ambiguity resolution and will have certain reference value.