Assessment of BeiDou’s Tropospheric Model (IGGtrop) for tropospheric delay correction in northern hemisphere
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Ashraf Farah
Abstract
Satellite navigation systems face different types of errors that affect the positioning accuracy. The tropospheric delay considers one of the major sources of error for the transmitted signal that could face a tropospheric delay of over 2 m at zenith and 20 m at lower satellite elevation angles. A positioning error of 10 m could result from inaccurate mitigation of the tropospheric delay. Two types of models are available; surface meteorological models and global empirical models. Surface meteorological models use surface meteorological data to give accurate mitigation while the global empirical models use global standard atmospheres. Global empirical models are favorable for satellite based augmentation systems such as EGNOS model for the EGNOS augmentation system. Several hybrid neutral atmosphere delay models have been developed (UNB1 through UNB4). The IGGtrop model is initially developed to provide tropospheric delay corrections for the users of Chinese BeiDou Navigation Satellite System (BDS) and its augmentation system. This paper presents an assessment study for the behaviour of IGGtrop model comparing with (EGNOS, UNB3M) models. The behavior of the three models is compared with IGS-tropospheric estimations for two different-latitude IGS stations; (bhr1 and eil1) in the northern hemisphere. This study recommends using IGGtrop model for estimating the zenith tropospheric delay correction for low-latitude regions in northern hemisphere for all seasons with an average zenith tropospheric difference of 0.75 cm. IGGtrop model is also recommended to be used for estimating the zenith tropospheric delay correction for high-latitude geographic regions in northern hemisphere during autumn and spring seasons with an average zenith tropospheric difference of 0.75 cm. While UNB3M model is the best choice for tropospheric delay correction for high-latitude geographic regions in northern hemisphere during winter and summer seasons with an average zenith tropospheric difference of 1.1 cm.
Acknowledgment
The author is grateful for prof. Wei Li (Chinese Academy of Sciences, Institute of Geodesy and Geophysics) for providing the IGGtrop model.
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© 2020 Walter de Gruyter GmbH, Berlin/Boston
Artikel in diesem Heft
- Frontmatter
- Research Articles
- Utilization of geographically weighted regression for geoid modelling in Egypt
- Assessment of inner reliability in the Gauss-Helmert model
- Assessment of BeiDou’s Tropospheric Model (IGGtrop) for tropospheric delay correction in northern hemisphere
- On the applicability of a scan-based mobile mapping system for monitoring the planarity and subsidence of road surfaces – Pilot study on the A44n motorway in Germany
- Solution method for ill-conditioned problems based on a new improved fruit fly optimization algorithm
- Statistical inference and residual analysis for the evaluation of datum transformation models developed on 3D coordinate data
- Assessment of ArcGIS based extraction of geoidal undulation compared to National Geospatial Intelligence Agency (NGA) model – A case study
- Research on the method of three-dimensional surface displacements of Tianjin area based on combined multi-source measurements
- Quality assessment of Locata positioning system
- Subsidence is determined in the heart of the Central Valley using Post Processed Static and Precise Point Positioning techniques
Artikel in diesem Heft
- Frontmatter
- Research Articles
- Utilization of geographically weighted regression for geoid modelling in Egypt
- Assessment of inner reliability in the Gauss-Helmert model
- Assessment of BeiDou’s Tropospheric Model (IGGtrop) for tropospheric delay correction in northern hemisphere
- On the applicability of a scan-based mobile mapping system for monitoring the planarity and subsidence of road surfaces – Pilot study on the A44n motorway in Germany
- Solution method for ill-conditioned problems based on a new improved fruit fly optimization algorithm
- Statistical inference and residual analysis for the evaluation of datum transformation models developed on 3D coordinate data
- Assessment of ArcGIS based extraction of geoidal undulation compared to National Geospatial Intelligence Agency (NGA) model – A case study
- Research on the method of three-dimensional surface displacements of Tianjin area based on combined multi-source measurements
- Quality assessment of Locata positioning system
- Subsidence is determined in the heart of the Central Valley using Post Processed Static and Precise Point Positioning techniques
