GPS三频无几何相位组合周跳探测与修复

随着GPS现代化的实施和L5频率的开设,GPS进入了三频时代。相对于双频观测数据三频观测值线性组合可以形成更多长波长、弱电离层、低噪声的组合。本文分析了GPS三频无几何相位组合的特性,利用两个GPS三频无几何相位组合和一个三频伪距载波组合组成观测矩阵探测周跳,并采用搜索方法确保周跳修复的正确。最后利用模拟的L5观测数据进行验证,结果表明该算法可以有效地探测并修复周跳。

GPS Triple-frequency Geometry-free Phase Combination for Cycle-slip Detection and Correction

With the implementation of GPS Modernization and L5 frequency broadcast, GPS into three frequency era.Compared with the dual-frequency observation data, triple -frequency observation linear combination can be formed more long wavelength, low noise, low abscission layer.This paper analyzes the features of GPS triple-frequency geometry-free phase combination firstly,then uses two triple-frequency geometry-free phase combinations and a pseudo-range minus phase linear combination to detect cycle slip and combines a searching method to ensure the correct repair cycle slip .Finally using the simulate L5observation data verifica -tion, the results show that the algorithm can effectively detect and repair the cycle slip.