TUNE_AIRTOVAC

Type: _LOGICAL
Determines whether the wavelength scales in output datafiles are converted from air to to vacuum wavelengths.

If set to YES, then the vacuum wavelengths are converted using the procedure:

$$\begin{eqnarray*} wavm & = & {( {\rm old_{wavelength}} \times 10^{-4} )}^{-2} \... ...& = & {\rm old_{wavelength}} \times ( 1.0 + 10^{-4} \times sum ) \end{eqnarray*}$$

Only the wavelength scales in the output file are effected; the reduction database wavelength scales remain unchanged.

Initial suggested value: NO.