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| Description
| - Invited presentation at the EUREF 2014 Symposium. Abstract: The troposphere modelling is a limiting factor in GNSS positioning. The main difficulty resists in the modelling of 10 % of the total path delay, so called wet path delay, due to temporally and spatially variable moisture in the atmosphere. It can not be precisely modelled from in situ observations and additional information about the vertical profile is important, at least. Until recently, external meteorological data were not considered as helpful for the wet delay modelling in positioning. With recent improvements in quality and temporal and spatial resolution of numerical weather models, these might be suitable for a future support of kinematic GNSS positioning including airborne applications. In past decades, various models for zenith wet delay (ZWD) were derived, but the most commonly used one was developed 25 years ago by Askne and Nordius (1987). Their analytical formula is highly suitable for designing a tropospheric correcting model for geodetic positioning. The approach was adopted in the MOPS standard for the Wide Area Augmentation Systems. Recently, we have studied an optimal vertical approximation of ZWD and we defined a new parameterization. Using new formulation supporting more flexible parametrization, we demonstrated actually the best results in vertical approximation when compared with other existing approaches. Additionally, the new defined lapse rate was used for a significant improvement in the calculation of ZWD by the modification of the model by Askne and Nordius. Our method thus consists of two important enhancements – a) ZWD calculation itself by analytical formula and b) ZWD vertical reduction. We expect that the new ZWD model, in particular for its high flexibility with respect to meteorological input parameters, is well suited for developing future tropospheric augmentation models in support of positioning or various other related applications.
- Invited presentation at the EUREF 2014 Symposium. Abstract: The troposphere modelling is a limiting factor in GNSS positioning. The main difficulty resists in the modelling of 10 % of the total path delay, so called wet path delay, due to temporally and spatially variable moisture in the atmosphere. It can not be precisely modelled from in situ observations and additional information about the vertical profile is important, at least. Until recently, external meteorological data were not considered as helpful for the wet delay modelling in positioning. With recent improvements in quality and temporal and spatial resolution of numerical weather models, these might be suitable for a future support of kinematic GNSS positioning including airborne applications. In past decades, various models for zenith wet delay (ZWD) were derived, but the most commonly used one was developed 25 years ago by Askne and Nordius (1987). Their analytical formula is highly suitable for designing a tropospheric correcting model for geodetic positioning. The approach was adopted in the MOPS standard for the Wide Area Augmentation Systems. Recently, we have studied an optimal vertical approximation of ZWD and we defined a new parameterization. Using new formulation supporting more flexible parametrization, we demonstrated actually the best results in vertical approximation when compared with other existing approaches. Additionally, the new defined lapse rate was used for a significant improvement in the calculation of ZWD by the modification of the model by Askne and Nordius. Our method thus consists of two important enhancements – a) ZWD calculation itself by analytical formula and b) ZWD vertical reduction. We expect that the new ZWD model, in particular for its high flexibility with respect to meteorological input parameters, is well suited for developing future tropospheric augmentation models in support of positioning or various other related applications. (en)
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| Title
| - Enhanced zenith wet delay modelling for geodetic applications
- Enhanced zenith wet delay modelling for geodetic applications (en)
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| skos:prefLabel
| - Enhanced zenith wet delay modelling for geodetic applications
- Enhanced zenith wet delay modelling for geodetic applications (en)
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| skos:notation
| - RIV/00025615:_____/14:#0002094!RIV15-GA0-00025615
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
| - P(ED1.1.00/02.0090), P(GAP209/12/2207)
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/00025615:_____/14:#0002094
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - GNSS; Troposphere modelling (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...i/riv/kodPristupu
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...i/riv/mistoVydani
| - EUREF Symposium 2014, Vilnius, Lithuania
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...vavai/riv/projekt
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| http://linked.open...UplatneniVysledku
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| http://linked.open...iv/tvurceVysledku
| - Douša, Jan
- Eliaš, Michal
- Zus, Florian
|
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