北斗三频中长基线模糊度解算研究

在推导TCAR模型基础上，研究制约TCAR快速固定中长基线模糊度的影响因素，提出一种基于三频无几何无电离层组合快速解算中长基线模糊度的新方法。然后利用北斗观测数据进行验证分析，TCAR算法能够解决北斗短基线模糊度快速固定问题，而新方法可以实现中长基线模糊度的快速、准确固定。

Research on BDS Triple-Frequency Medium and Long Baseline Ambiguity Resolution

Based on the introduction of the TCAR (three carrier ambiguity resolution) model, we analyze factors affecting the TCAR algorithm in the long baseline ambiguity resolution. The TCAR algorithm cannot get the correct ambiguity resolution, so a new method based on triple-frequency geometry-free ionosphere-free combinations is advanced to resolve the long baseline quick ambiguity. Finally, Beidou data are used to validate the new algorithm, showing that the TCAR algorithm can resolvethe short baseline ambiguity, and that the new method can resolve long baseline quick ambiguity.