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GNSS Zenith Total Delay (ZTD) estimates in real time
Douša, Jan ; Bezděka, Petr ; Kala, Michael ; Václavovic, Pavel

Publication type: anotace

Global Navigation Satellite System (GNSS) is an established atmospheric monitoring technique delivering water vapor data in near-real time (NRT) with a time resolution of 60 minutes and a latency of 90 minutes for operational Numerical Weather Prediction in Europe within the EUMETNET EIG GNSS Water Vapor Programe (E-GVAP). Recently, the GNSS processing has been advanced towards real-time Zenith Tropospheric Delays (ZTDs) estimates comparable in quality to the standard NRT solution. Contrary to NRT, the RT solution provides a product with a 5-min temporal resolution and the latency lower than 5 minutes, hence being suitable for for severe weather monitoring and nowcasting. The new service has been established at Geodetic Observatory Pecny of the Research Institute of Geodesy, Topography and Cartography for high-resolution RT GNSS ZTD production. The Precise Point Positioning (PPP) method operated in real time has been conducted with the G-Nut software since 2020 for more than 200 stations in Europe and worldwide. The evaluation of the RT ZTDs is regularly performed using final GNSS tropospheric products, and the results achieved root-mean-square errors bellow 5-9 mm. Actual visualizations of the product is available at

Citation: BEZDĚKA, Petr, Jan DOUŠA, Michael KALA a Pavel VÁCLAVOVIC. GNSS Zenith Total Delay (ZTD) estimates in real time. 2021. Dostupné také z:

The record appears in these collections:
Focus on VÚGTK > VÚGTK Departments > Geodesy and Geodynamics
Focus on VÚGTK > Researchers > Pavel Václavovic
Focus on VÚGTK > Researchers > Petr Bezděka
Focus on VÚGTK > Researchers > Michael Kala
Focus on VÚGTK > Researchers > Jan Douša
Documents of VÚGTK > Articles VÚGTK
Focus on VÚGTK > RIV

 Record created 2022-06-06, last modified 2022-06-07

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