Permanent VRS Network and Positioning Engine for Mass-Market Scalable Precise Navigation

Banque-Casanovas, Xavier; García-Fernández, Miquel; Giménez, Aleix Tejada; Delgado-Tejedor, Maria Elisa; Hoyas-Ester, Isaac; Siutkowska, Malgorzata

doi:10.33012/2022.18312

Cited by 1 publication

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“…However, during heavy rainfall or other severe weather conditions, tropospheric anomalies may occur, causing high spatial variation [ 3 , 4 ] of the tropospheric delay that cannot be easily mitigated, resulting in residual errors that can affect the navigation system’s accuracy and integrity. This is of particular concern for both the existing GNSS augmentation techniques, such as ground-based augmentation systems (GBAS) [ 5 , 6 ] that rely on correction generation based on local observations and modeling the effect on the user side, and the evolving high precision GNSS augmentation systems, such as the network real time kinematic (NRTK) implementations [ 7 , 8 ] aiming at integrity support to cover the needs of new user groups, e.g., in future autonomous transportation operations where the observed residuals are interpolated to the position of the user or a virtual reference station (VRS).…”

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confidence: 99%

Analysis of Spatial Decorrelation of Small-Scale Tropospheric Delay Using High-Resolution NWP Data

Håkegård

Sokolova

Morrison

2023

Sensors

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This paper contains results from a study where numerical weather product (NWP) data provided by MET Norway were used to estimate the differential zenith tropospheric delay (dZTD) for an area including Scandinavia, Finland and the Baltic countries. The NWP data have a high spatial resolution of 2.5×2.5 km, and the estimated dZTD for the grid positions allows for calculation of the tropospheric gradient on short baselines. The results give an indication of how large dZTD values for baselines of up to 20 km can be, and of where the largest events are located within the coverage area. One year of data were processed, and dZTD values up to 18 cm with baselines were detected. Preliminary results comparing the NWP-based results with GNSS-based results are included. The motivation for this investigation was to better understand the characteristics of this phenomenon as a preamble to a later investigation of how it might impact GNSS-based navigation systems with integrity support in these regions.

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