airtovac¶
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pydl.goddard.astro.
airtovac
(air)[source]¶ Convert air wavelengths to wavelengths in vacuum.
Parameters: air : array-like
Values of wavelength in air in Angstroms.
Returns: array-like
Values of wavelength in vacuum in Angstroms.
Notes
- Formula from P. E. Ciddor, Applied Optics, 35, 1566 (1996).
- Values of wavelength below 2000 Å are not converted.