arxivphysics.ao-phcs.LGphysics.geo-ph2026-07-06
Integrating GNSS-Derived Zenith Wet Delay into a Weather Foundation Model Improves Precipitation Forecasting
Leonardo Trentini, Fanny Lehmann, Laura Crocetti, Benedikt Soja
Global Navigation Satellite Systems (GNSS), best known for positioning, also serve weather science, as atmospheric water vapour delays their signals. This delay, the Zenith Wet Delay (ZWD), is a direct, all-weather measure of column moisture. Although assimilated into numerical w…