Table 3 Coefficients and performance evaluations of LRM for fitting ERA5 surface pressure and GNSS-ZHD data
GNSS stations | Model coefficients (with 95% confidence bounds) | Goodness of fit | Degree of freedom (DF)\(n = 2\) | ||
|---|---|---|---|---|---|
\(a_{1}\) | \(a_{2}\) | RMS (mm) | \(R^{2}\) | ||
ABUZ | 0.01859 ± 0.00020 | 391.5 ± 18.7 | 2.3086 | 0.7336 | 12,088 |
BJCO | 0.01742 ± 0.00013 | 547.3 ± 12.6 | 2.1029 | 0.7533 | 24,687 |
BKFP | 0.01906 ± 0.00015 | 368.1 ± 14.0 | 2.3359 | 0.8164 | 15,488 |
FUTY | 0.01456 ± 0.00013 | 810.5 ± 12.5 | 2.2488 | 0.7565 | 16,164 |
OSGF | 0.01656 ± 0.00029 | 588.1 ± 27.4 | 2.3077 | 0.6891 | 5866 |
UNEC | 0.01742 ± 0.00019 | 521 ± 18.4 | 2.3722 | 0.7552 | 10,986 |
Average | 0.01727 ± 0.00018 | 537.75 ± 17.3 | 2.2794 | 0.7507 |  |