J. Stutz et U. Platt, NUMERICAL-ANALYSIS AND ESTIMATION OF THE STATISTICAL ERROR OF DIFFERENTIAL OPTICAL-ABSORPTION SPECTROSCOPY MEASUREMENTS WITH LEAST-SQUARES METHODS, Applied optics, 35(30), 1996, pp. 6041-6053
Differential optical absorption spectroscopy (DOAS) has become a widel
y used method to measure trace gases in the atmosphere. Their concentr
ation is retrieved by a numerical analysis of the atmospheric absorpti
on spectra, which often are a combination of overlapping absorption st
ructures of several trace gases. A new analysis procedure was develope
d, modeling atmospheric spectra with the absorption structures of the
individual trace gases, to determine their concentrations. The procedu
re also corrects differences in the wavelength-pixel mapping of these
spectra. A new method to estimate the error of the concentrations cons
iders the uncertainty of this correction and the influence of random r
esidual structures in the absorption spectra. (C) 1996 Optical Society
of America