整周模糊度搜索空间确定方法研究

The Study on Integer Ambiguity Searching Space

高精度GPS定位需要解算双差分载波相位的整周模糊度值。模糊度搜索空间的合理确定对整周模糊度计算的正确率和计算效率至关重要。通过比较几种常见的动态整周模糊度搜索方法,提出一种直接通过浮点模糊度方差阵确定整周模糊度搜索空间的方法。进行了基于实测数据的实验与分析。实验结果表明,该算法计算量小,且具有较高的正确率。该方法可使模糊度搜索效率得到提高,相应的定位精度明显改善。

The precise GPS positioning in navigation needs solving integer ambiguity from double differenced observations.The rationality of searching space is very important for accuracy and efficiency of searching integer ambiguity in ambiguity space.Several dynamic integer ambiguity searching methods were compared.A simple method was introduced to determine the ambiguity searching space by analyzing the covariance matrix directly.The experiment indicates that this method is accurate and efficient.This method can improve efficiency of integer ambiguity searching and positioning precision.