Table 4 The performance of the GZTD-P model and GPT3 model with different resolutions in the ZTD vertical interpolation of radiosonde data
From: Refining the ERA5-based global model for vertical adjustment of zenith tropospheric delay
Models | Number of parameters | Bias specifications (cm) | RMS specifications (cm) | ||||
|---|---|---|---|---|---|---|---|
| Â | Â | Max | Min | Mean | Max | Min | Mean |
GZTD-P-2 | 324 000 | 7.39 |  − 9.66 | 0.64 | 12.48 | 1.72 | 3.20 |
GPT3-1 | 1 296 000 | 5.27 |  − 13.35 |  − 1.78 | 15.76 | 1.53 | 4.16 |
GZTD-P-5 | 51 840 | 7.04 |  − 10.17 | 0.62 | 12.96 | 1.65 | 3.21 |
GPT3-5 | 51 840 | 5.11 |  − 13.42 |  − 1.89 | 15.53 | 1.46 | 4.21 |