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Table 2.
Comparison of the modelling parametrization of the telluric correction methods.
| Characteristics | Molecfit | TelFit | TAPAS |
|---|---|---|---|
| Wavelength coverage (μm) | 0.3–30 | 0.3–2.4 | 0.35–2.5 |
| Radiative transfer code | LBLRTM | LBLRTM | LBLRTM |
| Spectroscopic database | HITRAN 2008/12 | HITRAN 2008/12 | HITRAN |
| Weather models database | GDAS | GDAS | ETHER |
| Default atmospheric profile | Merged | Mid-latitude | Arletty |
| Other atmospheric profiles | Equatorial, Mid-latitude | GDAS | Equatorial, Mid-latitude |
| Automatic download profile | ✔ | ✘ | ✘ |
| Fitting atmospheric transmission | ✔ | ✔ | ✘ |
| Atmospheric transmission options: | |||
| Molecules: H2O, CO2, O3, N2O, CH4, O2 | ✔ | ✔ | ✔ |
| CO, NO, SO2, NO2, NH3, HNO3 | ✔ +11 others | ✔ | ✘ |
| Transmission spectrum of individual molecule | ✘ | ✘ | ✔ |
| Resolution | ✘ | ✔ | ✔ |
| Gaussian line shape | ✔ | ✔ | ✔ |
| Lorentzian line shape | ✔ | ✘ | ✘ |
| Voigt line shape | ✔ | ✘ | ✘ |
| Singular value decomposition | ✘ | ✔ | ✘ |
| Fitting parameters: | |||
| Molecule | ✔ | ✔ | (. . .) |
| Resolution/line shape | ✔ | ✔ | (. . .) |
| Wavelength correction | ✔ | ✔ | (. . .) |
| Continuum correction | ✔ | ✔ | (. . .) |
| Telescope background emission | ✔ | ✘ | (. . .) |
Notes.Molecfit and TelFit packages allow for fitting the atmospheric transmission to the target spectrum.
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