An ERA5-based hourly global pressure, temperature, and relative humidity model
          temperature          pressure          atmospheric-modelling          gnss          humidity-values          relative-humidity          era5          pressure-model          temperature-model          atmospheric-delay          weighted-mean-temperature          hgpt-model          zenith-tropospheric-delay          total-tropospheric-delay      
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            Updated
            Feb 14, 2022 
- Fortran