无先验信息的改进目标函数单历元模糊度正确率分析

Single Epoch Ambiguity Resolution Success Rates Under Modified Objective Function Without Prior Baseline Information

基于C/A码和双频载波相位信息建立双差伪距和宽巷相位观测模型,以浮点变换方法生成模糊度备选空间,将改进的目标函数"L1相位残差平方和与L2相位残差平方和之和"替换传统的目标函数"浮点解与真解残差二次型"作为模糊度搜索的准则。18h实测静态数据的计算结果表明,在模糊度求解的正确率、可靠性和可用性方面,改进的目标函数优于传统的目标函数。

In this paper, the traditional objective function, the quadratic of difference of float ambigui- ty and integer ambiguity, is replaced by a modified function called sum of L1 and L2 pure carrier phase residua squares when searching for a correct integer ambiguity. The integer ambiguities search space is obtained by a floating transformation and building observation model with DD （double difference） C/A code range and wide lane carrier phase. The calculation results from 18-hour static GPS data indicate that the modified is better than the traditional objective function for reliability and usability with a higher success rate.