摘要
针对网络RTK实现高精度实时动态定位中参考站整周模糊度的实时快速准确确定的问题,该文提出一种GPS网络RTK参考站间整周模糊度的实时快速解算方法:首先利用L1、L2频率的伪距和载波相位观测值,计算参考站间的双差宽巷模糊度,并使用严格的整周模糊度固定准则确定双差宽巷整周模糊度;然后通过L1、L2双差载波相位整周模糊度间的整数线性关系选择模糊度备选值,并将宽巷整周模糊度作为L1、L2双差载波相位整周模糊度的约束关系用于确定双差载波相位整周模糊度。经CORS网实测数据的实验验证,该方法可以实时准确确定参考站间L1、L2双差载波相位整周模糊度,并且是以单个模糊度参数为对象进行计算,计算量小,模糊度解算效率高。
The real time rapid integer ambiguity resolution of reference stations is the key problem of high precision real time dynamic positioning by Network RTK.The method of real time rapid integer ambiguity resolution between GPS Network RTK reference stations was introduced in this paper.The double difference wide lane ambiguities between reference stations were calculated by pseudo range and carrier phase observation of double frequency.The strict guidelines were used to fix double difference wide lane integer ambiguities.Then ambiguity candidates were selected by the linear relationship of double difference carrier phase ambiguities of L1 and L2 frequency.The wide lane ambiguity was used as restricted relationship to fix double difference carrier phase ambiguities.The test was done by the data of CORS net.The results of test indicate that this method can fix the double difference carrier phase ambiguities of L1 and L2 frequency.And the computing object is the single ambiguity,so the amount of calculation is small and this method has high efficiency of ambiguity resolution.
引文
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