Mitigation of multipath effect in GNSS short baseline positioning by the multipath hemispherical map

被引:1
|
作者
D. Dong
M. Wang
W. Chen
Z. Zeng
L. Song
Q. Zhang
M. Cai
Y. Cheng
J. Lv
机构
[1] East China Normal University,Shanghai Key Laboratory of Multidimensional Information Processing
[2] Tongji University,College of Surveying and Geo
来源
Journal of Geodesy | 2016年 / 90卷
关键词
GPS; Multipath; Real-time reduction; Spatiotemporal repeatability;
D O I
暂无
中图分类号
学科分类号
摘要
Multipath is one major error source in high-accuracy GNSS positioning. Various hardware and software approaches are developed to mitigate the multipath effect. Among them the MHM (multipath hemispherical map) and sidereal filtering (SF)/advanced SF (ASF) approaches utilize the spatiotemporal repeatability of multipath effect under static environment, hence they can be implemented to generate multipath correction model for real-time GNSS data processing. We focus on the spatial–temporal repeatability-based MHM and SF/ASF approaches and compare their performances for multipath reduction. Comparisons indicate that both MHM and ASF approaches perform well with residual variance reduction (50 %) for short span (next 5 days) and maintains roughly 45 % reduction level for longer span (next 6–25 days). The ASF model is more suitable for high frequency multipath reduction, such as high-rate GNSS applications. The MHM model is easier to implement for real-time multipath mitigation when the overall multipath regime is medium to low frequency.
引用
收藏
页码:255 / 262
页数:7
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