1. A method for standardizing the derivation of the temperature in the mesopause region from hydroxyl (OH*) airglow, in which method the intensities of three lines of OH* emission and of a basic position are measured during the night using ground-based IR spectrometers, characterized in that a) a noisy OH* spectrum is smoothed by filtering out white noise superimposed on the measured OH* intensities, by means of a spectral analysis method in the form of a harmonic analysis or by means of adaptation using the Voigt function carried out in the form of a combination of a Lorentz distribution and a Doppler distribution, b) on the basis of a smoothed spectrum, a discrimination of disturbed spectra is performed by a defined examination of the structure of each spectrum, and c) a decision is made on the quality of the adaptation of the obtained smoothed spectrum to the original spectrum, by use of statistical characteristic variables and by selecting one of the two methods, harmonic analysis function or Voigt function, and the temperature is thereby accurately determined.