Wavelength registration of high resolution oxygen A-band spectral measurements

A wavelength registration algorithm has been developed for the high resolution oxygen A-band spectrometer (HABS). The concept of this algorithm is to extract the location of specific absorption features from the HABS measured oxygen A-band spectrum in pixel space and register them to the wavelengths corresponding to those features of the standard or reference spectrum in wavelength space. The dependence of the location of specific absorption features on airmass has been discussed and taken into account. The whole spectrum is then obtained by fitting the relationship between the known wavelengths and the corresponding pixels. This algorithm can register each measured spectrum individually and fast. The application on the measurements of two days demonstrates that this wavelength registration algorithm is feasible and accurate for the wavelength registration of the HABS high resolution spectra.

► We have developed a wavelength registration algorithm for the high resolution oxygen A-band spectrometer. ► This algorithm utilizes the absorption features of the oxygen A-band spectrum to register pixels into wavelength space. ► The dependence of the location of specific absorption features on airmass has been discussed and taken into account. ► This algorithm can register each measured spectrum individually and fast. ► This algorithm has been validated and evaluated based on the measurements of a field campaign.