Table 1 The fitting error of piecewise function and exponential function
From: Refining the ERA5-based global model for vertical adjustment of zenith tropospheric delay
Coordinate | RMS of piecewise function and exponential function (mm) | ||||
|---|---|---|---|---|---|
|  | 0–3 km | 3–8 km | 8–16 km |  > 16 km | Exponential function |
70°N,40°E | 7.2 | 2.8 | 8.4 | 3.2 | 22.6 |
70°N,80°E | 8.7 | 2.9 | 9.8 | 3.0 | 21.8 |
40°N,140°W | 9.8 | 0.5 | 8.4 | 3.2 | 16.9 |
40°N,100°W | 9.8 | 1.0 | 7.9 | 2.9 | 25.1 |
40°S,40°E | 12.5 | 1.9 | 8.1 | 3.1 | 19.3 |
40°S,80°E | 9.8 | 2.3 | 7.4 | 3.1 | 24.0 |
70°S,140°W | 8.2 | 2.0 | 9.8 | 3.0 | 15.5 |
70°S,100°W | 10.6 | 3.2 | 9.7 | 3.0 | 22.5 |
Mean over the globe | 10.4 | 2.7 | 9.0 | 3.1 | 20.7 |