基准站模糊度固定是网络RTK系统初始化的前提条件。文中使用非组合方法来固定基准站间模糊度。该方法相对于传统组合方法而言具有以下3个优点：1)基于非组合观测值，避免了观测噪声的放大；2)将L2模糊度变换为L1与宽巷模糊度WL( Wide￣Lane)模糊度的差值，同步求解WL和L1模糊度浮点解，简化了计算过程；3) WL模糊度由平差得到，部分模糊度固定后，加快了其他WL模糊度的固定速度。实验结果表明，非组合方法相对于传统方法而言，WL模糊度固定速度提高了24.5％； L1模糊度固定正确率提高了7.9％。可以认为，在网络RTK初始化方面，非组合方法要优于传统方法。%Base stations Ambiguity Resolution AR is the precondition of Network RTK initialization. The uncom￣bined method is applied to fix the base stations ambiguities compared with the traditional combined method there are three advantages as follows Firstly uncombined observations are used which avoid the noise to be ampli￣fied. Secondly L2 ambiguities are transformed into Wide￣Lane WL and L1 ambiguities so that the two types of ambiguities can be estimated simultaneously which reduces the complexity. Thirdly WL ambiguities are calculated by adjustment if partial ambiguities have been fixed the fixed speed of remained WL ambiguities will be im￣proved. The experiment results show that the AR speed of wide￣lane ambiguities obtained by uncombined method is 24.5% faster than that obtained by traditional method. The uncombined method s correct rate of L1 ambiguities resolution is 7.9% higher than traditional method. It can be concluded that the uncombined method is better than traditional algorithm in network RTK initialization field.
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