The determination of tropopause height (TPH) is crucial for atmospheric research and the improvement of Global Navigation Satellite System (GNSS) meteorological models. While TPH determination from ground-based GNSS zenith tropospheric delay (ZTD) offers high spatiotemporal resolution and all-weather continuity, it requires precise calibration of the zenith hydrostatic delay above the tropopause (ZHDTPH). This calibration is typically derived from meteorological reanalysis products using the Saa