Print Email Facebook Twitter The effect of function-based and voxel-based tropospheric tomography techniques on the GNSS positioning accuracy Title The effect of function-based and voxel-based tropospheric tomography techniques on the GNSS positioning accuracy Author Haji Aghajany, S. (TU Delft Mathematical Geodesy and Positioning; K.N. Toosi University of Technology) Amerian, Yazdan (K.N. Toosi University of Technology) Verhagen, S. (TU Delft Mathematical Geodesy and Positioning) Rohm, Witold (Wroclaw University of Environmental and Life Sciences) Schuh, Harald (VolcanoTectonics Junior Research Group; Technical University of Berlin) Date 2021 Abstract Tropospheric wet delay, the main source of which is water vapor, is one of the major factors affecting the accuracy of positioning techniques using microwave. Tropospheric tomography is a powerful method to reconstruct the water vapor content in four-dimensional (4D) space. This paper studies the effect of using function-based and voxel-based tropospheric tomography methods on the positioning accuracy. This examination is performed on the static and kinematic positioning modes using Global Navigation Satellite Systems (GNSS) stations under different weather conditions. After validating the results of tomography methods using radiosonde observations, the tomography-based positioning solutions, including function-based and voxel-based approaches, are compared with the positions obtained using tropospheric models. The results of two GPS stations show that the accuracy increases when applying tomography approaches. The function-based tomography is able to increase the accuracy of the up component of the static and kinematic modes by about 0.42 and 0.79 cm, respectively, compared to the voxel-based method. In addition, the use of the function-based tropospheric tomography can decrease the convergence time of the kinematic Precise Point Positioning (PPP) solution. Subject Function-basedGNSSPrecise Point PositioningTropospheric tomographyVoxel-based To reference this document use: http://resolver.tudelft.nl/uuid:be3431ab-5518-41de-bce4-3ea2be9e6168 DOI https://doi.org/10.1007/s00190-021-01528-2 Embargo date 2022-06-24 ISSN 0949-7714 Source Journal of Geodesy, 95 (7) Part of collection Institutional Repository Document type journal article Rights © 2021 S. Haji Aghajany, Yazdan Amerian, S. Verhagen, Witold Rohm, Harald Schuh Files PDF PostPrint_10.1007s00190_0 ... 1528_2.pdf 2.26 MB Close viewer /islandora/object/uuid:be3431ab-5518-41de-bce4-3ea2be9e6168/datastream/OBJ/view