GetInitialSpectralUnit

Callable

• GetInitialSpectralUnit(type: SpectralType, headerUnit: string | undefined): SpectralUnit | null

---

• Get the initial unit of a spectral coordinate: the header unit if it is a supported unit of the type and not the standard base unit of the type (e.g. Angstrom for a wavelength axis), otherwise the default unit of the type (e.g. GHz for a frequency axis in Hz)

  ---

  Parameters

  • type: SpectralType

    spectral type of the axis

  • headerUnit: string | undefined

    CUNIT value of the axis

  Returns SpectralUnit | null