一个模糊度解算的新概念

A new concept of ambiguity resolution

比较了现有的GPS载波相位模糊度解算方法。模糊度实数解估计可以应用包括站星几何图形的模型,也可应用不包括站星几何图形的模型,从而建立相应的模糊度搜索空间。通过数值分析发现这两个空间存在差异,但在两个空间中搜索到的模糊度整数解是一致的,从而判断两个空间有部分重叠,提出了双空间模糊度搜索概念。

A comprehensive comparison of the algorithms of GPS carrier phase ambiguity resolution is discussed. The float solution can be estimated by two kinds of models which may have the relative receiver?satellite geometry included (called 'geometry?based') or excluded ('geometry?free'), and construct corresponding two kinds of ambiguity search spaces. Numerical analysis shows that there exists some differenes between two spaces, but the integer solution of ambiguity searched in both cases is consistent, so it is judged that two spaces have only partial superposition. And a new concept of ambiguity resolution, called dual?space ambiguity resolution appproach(DARA), i.e., searching in two spaces at the same time, is presented.