The dataset is used in the publication:

Homogenization of integrated water vapour time series using twin GNSS stations and vertical step offsets
by

Tong Ning and Gunnar Elgered

Atmos. Meas. Tech. Discuss.,   

There are 20 sites. Each site has two stations, see the file station_coordinates.csv.

The station coordinate file include longitude in °E, latitude in °N, height in m.

There is one data file for each station and the station name is in the file name.

Columns in the data files:

1. Date and time (UTC), in the format yyyy-mm-dd hh-mm-ss
2. GPS-derived Integrated Water Vapour (IWV) (mm)
3. 1-sigma formal error of GPS-derived IWV (mm)
4. GPS-derived Zenith Wet Delay (ZWD) (mm)
5. GPS-derived Zenith Hydrostatic Delay (ZHD) (mm)
6. ERA5-derived IWV (mm)
7. ERA5-derived mean temperature (K)
8. ERA5-derived ground temperature (K)
9. ERA5-derived ground pressure (hPa)

September 03, 2026
tong.ning@lm.se