GPS单历元双差整周模糊度确定主辅频相关算法研究  

GPS MAXCOM Algorithm of Single Epoch Double-Difference Integer Ambiguity Resolution

作　　者：周命端 解乾龙 姬旭 徐翔 崔立锟 白岩松 ZHOU Mingduan;XIE Qianlong;JI Xu;XU Xiang;CUI Likun;BAI Yansong(School of Geomatics and Urban Spatial Informatics,Beijing University of Civil Engineering and Architecture,Beijing 102616,China)

机构地区：[1]北京建筑大学测绘与城市空间信息学院,北京102616

出　　处：《大地测量与地球动力学》2024年第10期991-996,共6页Journal of Geodesy and Geodynamics

基　　金：中国高等教育学会2022年度高等教育科学研究规划课题(22CJRH0404);北京建筑大学研究生教育教学质量提升项目(J2023003)。

摘　　要：针对GPS现代化增加的L_(5)频率观测值,提出一种GPS单历元双差整周模糊度确定新算法,称为GPS主辅频相关算法。该算法仅采用GPS单历元数据的伪距观测值及主频率与辅频率的相位观测值,通过扩展双频相关法思想,将L_(1)设为主频率、L_(2)或L_(5)选为辅频率,建立GPS主频率与辅频率的双差相位观测值内在相关关系模型,在观测值平差值域和模糊度值域作交叉搜索,并利用Ratio显著性检验法单历元确认GPS主频率双差整周模糊度。算例表明,针对GPS现代化后可观测的L_(1)、L_(2)和L_(5)三种原始相位观测值,优选L_(5)为算法辅频率在模糊度解算效率及成功率上均略优于L_(2),本文算法是行之有效的。For the GPS modernization by adding L_(5) frequency observable values,we propose a new algorithm of GPS single epoch double-difference integer ambiguity resolution called GPS Main and Auxiliary Frequency Correlation Algorithm(MAXCOM).We use only GPS single epoch data,including pseudo-range observation values and phase observation values of main-frequency and auxiliary-frequency for the algorithm.We set L_(1) is set as the main-frequency and L_(2) or L_(5) as the auxiliary-frequency by expanding the idea of dual frequency correlation method to establish an internal-correlation model between double-difference phase observation values of GPS main-frequency and auxiliary-frequency.We conduct a cross-search between the adjustment value-domain of observation values and the value-domain of ambiguity,and then use the ratio significance test method to determine the double-difference integer ambiguity of GPS main-frequency.The example shows that for the three original phase observations of L_(1),L_(2) and L_(5) frequency after GPS modernization,selecting L_(5) as auxiliary-frequency of the algorithm is slightly better than L_(2) in terms of efficiency and success-rate of ambiguity resolution.The proposed algorithm is effective.

关 键 词：单历元RTK定位 双差整周模糊度 主辅频相关算法 L_(5)频率观测值 

分 类 号：P228[天文地球—大地测量学与测量工程]