Open Access
Table 1
Datasets used.
| HARPS dataset | ETC dataset | Generative ETC dataset | |
|---|---|---|---|
| Data acquisition | Oct. 24, 2003–Mar. 12, 2020 | Simulated using ATLAS9, Autokur, ETC | Same as ETC |
| Total spectra | 267 361 | 44 000 | 1960 |
| Spectral resolving power | R ≈ 115 000 | Matched to HARPS | Same as ETC |
| Wavelength range | 380–690 nm (3 nm gap) | Matched to HARPS | Same as ETC |
| Training–validation–testing split | 90–5–5% | 42 000–1000–1000 | 0–980–980 |
| Data augmentation | None | Radial velocity & u penalization | Radial velocity |
| Utilization | Real and mixed dataset; training, validation and testing | ETC and mixed dataset; training and testing | Computation of GIS from Eq. (17) |
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