...
Table 1: Average IPW bias and RMSD between IGS data and co-located techniques.Anchor table1 table1
Comparison | No. of co-located sites | Avg. points per site | Bias | RMSD | ||
Avg. [mm] | Range [mm] | Avg. [mm] | Range [mm] | |||
ERA5–IGS daily | 18 | 46 894 | 0.15 | -0.9 to 0.93 | 1.46 | 0.93 to 2.6 |
GRUAN RS–IGS daily | 2 | 704 | 0.23 | 0.11 to 0.36 | 0.91 | 0.6 to 1.23 |
IGRA–IGS daily | 15 | 2 054 | 0.43 | -0.9 to 1.84 | 1.64 | 0.73 to 2.27 |
MWR–IGS daily | 1 | 3 120 | 0.64 | – | 1.21 | – |
| Anchor | ||||
|---|---|---|---|---|
|
Figure 5: IPW differences in IGRA−IGS daily, ERA5−IGS daily, MWR−IGS daily, and GRUAN RS−IGS daily co-location datasets.
...
IGS and EPN dataset tabular description
Table 2. Metadata table
standard name | description |
report_id | This parameter starts from 1 for the first data report provided in the data file, and is incremented for each new report. |
| report_timestamp | Observation date time UTC |
| station_name | GNSS station identifier |
| city | City name |
| latitude | Latitude deg. North |
| longitude | Longitude deg. East |
| height_of_station_above_sea_level | Altitude above mean sea level |
Table 3. Data table
standard name | description |
| zenith_total_delay | It is one of the final products from geodetic GNSS data processing software, characterizing a delay of the GNSS signal on the path from a satellite to the receiver due to atmospheric refraction and bending, mapped into zenith direction. The numerical value of the zenith total delay correlates with the amount of total column water vapour (i.e., not including liquid water and/or ice) overhead the GNSS receiver antenna. |
| uncertainty_value1 | Rough estimate of standard uncertainty equivalent to 1-sigma uncertainty of zenith total delay |
| total_column_water_vapour | Total column water vapour derived from ZTD and ancillary meteorological data |
| uncertainty_value5 | Total uncertainty of GNSS total column water vapour |
| total_column_water_vapour_era5 | Total column water vapour retrieved from ERA5 at the station coordinates and altitude |
Product Availability and data licenses
...
Jupyter notebook(s) at the following location provide examples on how to read, plot, and reorganize the data:
Jupyter Viewer
References
| Anchor | ||||
|---|---|---|---|---|
|
...