A fusion ZTD grid model utilizing ERA5 and GNSS raw observations for enhancing PPP and optimizing PWV forecasts under extreme weather conditions

Key Points

• Enhancing precise point positioning (PPP) leads to more accurate weather predictions, especially under extreme conditions.
• The model utilizes ERA5 and GNSS raw observations to optimize precipitable water vapor (PWV) forecasting techniques.
• Analysis integrates innovative grid modeling approaches to effectively manage weather data from various sources.
• Implications may aid meteorological services in providing timely and precise forecasts during severe weather events.