GPS定向中利用码相位和载波相位组合建模的研究

摘要

GPS carrier observation matrix rank is deficient for single epoch that exists on conventional GPS orientation determination models. The mixed module with both carrier observation and code observation is a way to get a float ambiguity solution module, using weighting, linear plus elimination process. The results of this study indicate the precision of float ambiguity solutions obtained by the mixed module is in 5 cycles, which can quickly help LAMBDA algorithm estimate correct integer ambiguity resolution.%传统GPS定向多采用载波观测量建立观测模型,但其在单历元情况下存在秩亏问题.为避免此问题,文章提出将载波相位和码相位加权后的线性组合用于建立观测模型,在新的GPS定向观测模型中,采用消元处理得到整周模糊度浮点解.实验结果表明该模型可以使整周模糊度浮点解的精度在5周以内,能辅助LAMBDA算法快速确定整周模糊度.