摘要
全球导航卫星系统(GNSS)接收机的高精度定位主要依靠载波相位观测值,但在城市、高山、高架桥等复杂环境中,部分卫星信号遮挡及多路径效应对GNSS接收机载波相位观测值的影响十分显著,已成为高精度定位的主要误差来源之一。真实应用场景下,GNSS接收机载波相位观测的评估存在复现性差、试验成本高、受时空限制等问题。本文基于环形试验平台,通过部分卫星信号遮挡、卫星载波信号直达波与时延波相叠加两种方法,实现真实复杂场景下卫星信号遮挡和多路径效应的模拟,并提出了模拟复杂场景下GNSS接收机载波相位观测值精度的评估方法。实验结果表明,模拟复杂场景下GNSS接收机载波相位观测值精度的复现性较好,基于环形试验平台模拟GNSS接收机所处的不同真实复杂环境具有可行性。
High-precision positioning using global navigation satellite system(GNSS)receivers primarily relies on carrier phase observations.However,in complex environments such as cities,mountains,and elevated bridges,the effects of satel⁃lite signal blockage and multipath interference on GNSS receiver carrier phase observation values are significant,becoming one of the main sources of error for high-precision positioning.In real-world application scenarios,evaluating GNSS receiver carrier phase observations faces challenges such as poor repeatability,high testing costs,and constraints in time and space.Based on a circular experimental platform and using two methods—satellite signal blockage and the superposition of direct and delayed satellite carrier signals,this paper simulated satellite signal obstruction and multipath effects in real-world complex scenarios.Additionally,an evaluation method for the accuracy of GNSS receiver carrier phase observations in simu⁃lated complex scenarios was presented.Experimental results show that the repeatability of accuracy for GNSS receiver carrier phase observations in simulated complex scenarios is good.The use of the circular experimental platform for simulating GNSS receiver performance in various real-world complex environments is feasible.
作者
宋潇
洪卫
何浩鹏
彭友志
汪洋舰
SONG Xiao;HONG Wei;HE Haopeng;PENG Youzhi;WANG Yangjian(Wuhan Seismic Metrological Verification&Surveying Engineering Institute Company Limited,Wuhan,Hubei 430071,China;Key Laboratory of Earthquake Geodesy,China Earthquake Administration,Wuhan,Hubei 430071,China)
出处
《北京测绘》
2025年第9期1399-1404,共6页
Beijing Surveying and Mapping
基金
湖北省自然科学基金(2021CFB515)。
关键词
复杂场景
多路径
环形试验平台
三差载波相位观测值
载波相位观测值精度
complex scenario
multipath
circular experimental platform
triple-difference carrier phase observations
carrier phase observation accuracy
