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Table 3
Initial parameters for molecfit on each night based on Allart et al. (2017).
| Initial parameters | Values | Commentary |
|---|---|---|
| ftol | 10−9 | χ2 convergence criterion |
| xtol | 10−9 | Parameter convergence criterion |
| Molecules | H2O | For the spectral order of sodium |
| ncont | 1 | Polynomial degree for the continuum |
| a0 | 1.2, 3, 2a | Constant offset of the continuum in 103 |
| Calib. λ | Air | Type of wavelength calibration |
| nλ | 3 | Chebyschev degree of wavelength calibration |
| b0 | 0 | Constant offset for wavelength calibration |
| ωgaussian | 3.5 | FWHM in pixel |
| Kernel size | 15 | |
| Pixel scale | 0.16 | in arcsec pixel−1 |
| Slit width | 1.0 | in arcsec |
| MIPAS profile | equ.atm | Equatorial profile |
| Atmospheric profile | 0 | Natural profile |
| PWV | − 1 | No value taken into account |
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