基于动态更新检验的高采样率下双频GPS周跳探测方法  

Dual-Frequency GPS Cycle Slip Detection Method Based on Dynamic Update Test at High Sampling Rate

作　　者：王建英 黄德武 WANG Jianying;HUANG Dewu(School of Engineering,Yunnan College of Business Management,Kunming 650106,China;City College,Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[1]云南经济管理学院工程学院,云南昆明650106 [2]昆明理工大学城市学院,云南昆明650500

出　　处：《昆明理工大学学报（自然科学版）》2023年第5期66-77,共12页Journal of Kunming University of Science and Technology(Natural Science)

基　　金：第二批教育部新工科研究与实践项目(E-TMJZSLHY20202148);云南经济管理学院学科建设基金项目(2022XKJS06)。

摘　　要：GPS周跳是影响定位成果精度的重要因素之一,如何解决各个频率上周跳大小尤为关键.依据双频相位和伪距观测值,利用无几何距离观测方程Δ?=ΔN_(1)-(λ_(2)/λ_(1))ΔN_(2),通过伪距组建3种不同模型,提出了一种动态检验ΔN_(1)、ΔN_(2)异常值的方法,且不断更新ΔN_(1)、ΔN_(2)的标准差大小,约束双频上周跳的范围来确定周跳.通过采样率为1 s的GPS数据验证,本文3种方法中,在探测成功率方面,φ_(1)φ_(2)R_(1)R_(2)法最高,达95%以上,φ_(1)φ_(2)R_(1)法居中,达94%以上,φ_(1)φ_(2)R_(2)法最低,87%以上;误探率方面,φ_(1)φ_(2)R_(2)法最大,为3.45%,φ_(1)φ_(2)R_(1)法居中,为1.38%,φ_(1)φ_(2)R_(1)R_(2)为0.3种方法均能有效探测出周跳.GPS cycle slip is one of the important factors affecting positioning accuracy,and how to resolve the size of cycle slips at various frequencies is particularly crucial.According to the double frequency phase and pseudo range observation,three different models are constructed by using the geometry-free observation equation Δ?=ΔN_1-(λ_2/λ_1)ΔN_(2) through pseudo range,proposes a method to dynamically test the outliers of ΔN_1、ΔN_2,and constantly updates the standard deviation of ΔN_1、ΔN_(2) to determine the cycle slip by constraining the range of the cycle slip of the dual-frequency.Through the verification of GPS data with a sampling rate of 1 s,in the three methods in this paper,in terms of detection success rate,φ_1φ_2R_1R_(2) is the highest,reaching more than 95%,φ_1φ_2R_(1) is in the middle,reaching more than 94%,φ_1φ_2R_(2) is the lowest,more than 87%;In terms of false detection rate,φ_1φ_2R_(2) is 3.45%,φ_1φ_2R_(1) is in the middle,1.38%,φ_1φ_2R_1R_(2) is 0.Three methods can effectively detect cycle slip.

关 键 词：双频GPS 周跳 无几何距离 动态检验 GPS定位 

分 类 号：P228.4[天文地球—大地测量学与测量工程]